{"id":66,"date":"2020-08-20T11:04:12","date_gmt":"2020-08-20T03:04:12","guid":{"rendered":"http:\/\/47.108.144.50\/?p=66"},"modified":"2020-08-20T11:04:12","modified_gmt":"2020-08-20T03:04:12","slug":"%e4%bb%8e%e5%bc%80%e5%a7%8b%e5%88%b0%e7%bb%93%e6%9d%9f%e7%9a%84fuzzafl","status":"publish","type":"post","link":"http:\/\/pareto.fun\/?p=66","title":{"rendered":"\u4ece\u5f00\u59cb\u5230\u7ed3\u675f\u7684fuzz(AFL)"},"content":{"rendered":"\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5e0c\u671b\u4ece\u5934\u5230\u5c3e\u5b8c\u6210\u4e00\u9879\u6a21\u7cca\u7684\u5de5\u4f5c\u3002 \u8fd9\u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d\uff1f 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yaml-cpp\u7684README\u6587\u4ef6\u4e2d\u7684\u4e00\u4e2a\u6709\u8da3\u6ce8\u91ca\u662f\uff0c\u5b83\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u6784\u5efa\u4e00\u4e2a\u9759\u6001\u5e93\uff0c\u8fd9\u5bf9\u6211\u4eec\u6765\u8bf4\u662f\u5b8c\u7f8e\u7684\uff0c\u56e0\u4e3a\u6211\u4eec\u5e0c\u671b\u4e3aAFL\u63d0\u4f9b\u4e00\u4e2a\u9759\u6001\u7f16\u8bd1\u548c\u68c0\u6d4b\u5230\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/li><\/ul><\/li><li>\u6709\u793a\u4f8b\u4ee3\u7801\u5417\uff1f<ul><li>\u5728\u9879\u76ee\u6839\u76ee\u5f55\uff08<a href=\"https:\/\/github.com\/jbeder\/yaml-cpp\/tree\/master\/util%EF%BC%89%E7%9A%84util%E6%96%87%E4%BB%B6%E5%A4%B9%E4%B8%AD%EF%BC%8C%E6%9C%89%E4%B8%80%E4%BA%9B%E5%B0%8F%E7%9A%84cpp%E6%96%87%E4%BB%B6%EF%BC%8C%E5%AE%83%E4%BB%AC%E6%98%AF%E7%AE%80%E6%98%8E%E7%9A%84%E5%AE%9E%E7%94%A8%E7%A8%8B%E5%BA%8F%EF%BC%8C%E5%B1%95%E7%A4%BA%E4%BA%86%E4%BB%A5%E4%B8%8B%E5%8A%9F%E8%83%BD%EF%BC%9A\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/github.com\/jbeder\/yaml-cpp\/tree\/master\/util\uff09\u7684util\u6587\u4ef6\u5939\u4e2d\uff0c\u6709\u4e00\u4e9b\u5c0f\u7684cpp\u6587\u4ef6\uff0c\u5b83\u4eec\u662f\u7b80\u660e\u7684\u5b9e\u7528\u7a0b\u5e8f\uff0c\u5c55\u793a\u4e86\u4ee5\u4e0b\u529f\u80fd\uff1a<\/a>&nbsp;yaml-cpp\u5e93\u3002 \u7279\u522b\u611f\u5174\u8da3\u7684\u662fparse.cpp\u6587\u4ef6\u3002 \u8fd9\u4e2aparse.cpp\u6587\u4ef6\u975e\u5e38\u5b8c\u7f8e\uff0c\u56e0\u4e3a\u5b83\u5df2\u7ecf\u88ab\u7f16\u5199\u4e3a\u53ef\u4ee5\u63a5\u6536\u6765\u81eastdin\u7684\u6570\u636e\uff0c\u5e76\u4e14\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u4f7f\u5176\u9002\u5e94AFL\u7684\u6301\u4e45\u6a21\u5f0f\uff0c\u8fd9\u5c06\u5927\u5927\u63d0\u9ad8\u901f\u5ea6\u3002<\/li><\/ul><\/li><li>\u6709\u5bb9\u6613\u83b7\u5f97\u7684\u548c\u72ec\u7279\/\u6709\u8da3\u7684\u6d4b\u8bd5\u7528\u4f8b\u5417\uff1f<ul><li>\u5728\u9879\u76ee\u6839\u76ee\u5f55\u7684test\u6587\u4ef6\u5939\u4e2d\uff0c\u6709\u4e00\u4e2a\u540d\u4e3aspecexamples.h\u7684\u6587\u4ef6\uff0c\u5176\u4e2d\u5305\u542b\u8bb8\u591a\u72ec\u7279\u800c\u6709\u8da3\u7684YAML\u6d4b\u8bd5\u7528\u4f8b\uff0c\u6bcf\u4e2a\u7528\u4f8b\u4f3c\u4e4e\u90fd\u5728yaml-cpp\u5e93\u4e2d\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u6bb5\u3002 \u540c\u6837\uff0c\u5bf9\u4e8e\u6211\u4eec\u6765\u8bf4\uff0c\u8fd9\u975e\u5e38\u9002\u5408\u4f5c\u4e3a\u6a21\u7cca\u6d4b\u8bd5\u7684\u79cd\u5b50\u3002<\/li><\/ul><\/li><\/ol>\n\n\n\n<p>\u7a0b\u5e8f\u770b\u8d77\u6765\u5f88\u7b80\u5355\u6765\u5f00\u59cbfuzz \u6d4b\u8bd5\uff0clets\u2018s do it\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-1\">\u5f00\u59cbfuzz<\/h1>\n\n\n\n<p>\u6211\u4eec\u5c06\u4e0d\u4ecb\u7ecd\u5b89\u88c5\u6216\u8bbe\u7f6eAFL\uff0c\u56e0\u4e3a\u6211\u4eec\u5047\u5b9a\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002 \u6211\u4eec\u8fd8\u5047\u8bbe\u8fd8\u5df2\u7ecf\u6784\u5efa\u5e76\u5b89\u88c5\u4e86afl-clang-fast\u548cafl-clang-fast ++\u3002 \u5c3d\u7ba1afl-g ++\u5e94\u8be5\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\uff08\u5c3d\u7ba1\u60a8\u4e0d\u4f1a\u4f7f\u7528\u51fa\u8272\u7684\u6301\u4e45\u6a21\u5f0f\uff09\uff0c\u4f46afl-clang-fast ++\u65e0\u7591\u662f\u9996\u9009\u3002 \u8ba9\u6211\u4eec\u83b7\u53d6yaml-cpp\u4ee3\u7801\u5e93\uff0c\u5e76\u4f7f\u7528AFL\u8fdb\u884c\u6784\u5efa\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># git clone https:\/\/github.com\/jbeder\/yaml-cpp.git\n# cd yaml-cpp\n# mkdir build\n# cd build\n# cmake -DCMAKE_CXX_COMPILER=afl-clang-fast++ ..\n# make<\/code><\/pre>\n\n\n\n<p>or afl-g++<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cmake -DCMAKE_CXX_COMPILER=afl-g++<\/code><\/pre>\n\n\n\n<p>\u4e00\u65e6\u6211\u4eec\u77e5\u9053\u4e00\u5207\u90fd\u53ef\u4ee5\u6210\u529f\u6784\u5efa\uff0c\u5c31\u53ef\u4ee5\u5bf9\u67d0\u4e9b\u6e90\u4ee3\u7801\u8fdb\u884c\u4e00\u4e9b\u66f4\u6539\uff0c\u4ee5\u4fbfAFL\u53ef\u4ee5\u63d0\u9ad8\u901f\u5ea6\u3002 \u4ece\u9879\u76ee\u7684\u6839\u76ee\u5f55\/util\/parse.cpp\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u65b0main()\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main(int argc, char** argv) {\n  Params p = ParseArgs(argc, argv);\n\n  if (argc > 1) {\n    std::ifstream fin;\n    fin.open(argv&#91;1]);\n    parse(fin);\n  } else {\n    parse(std::cin);\n  }\n\n  return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\u8fd9\u4e2a\u7b80\u5355\u7684main\uff08\uff09\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u65b0if\u8bed\u53e5\u7684else\u5b50\u53e5\uff0c\u4ee5\u5305\u62ec\u4e00\u4e2awhile\u5faa\u73af\u548c\u4e00\u4e2a\u79f0\u4e3a__AFL_LOOP\uff08\uff09\u7684\u7279\u6b8aAFL\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4f7fAFL\u53ef\u4ee5\u901a\u8fc7\u67d0\u79cd\u5185\u5b58\u5411\u5bfc\u57fa\u672c\u4e0a\u5bf9\u8fdb\u7a0b\u4e2d\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u8fdb\u884c\u6a21\u7cca\u5904\u7406\u3002 \uff0c\u800c\u4e0d\u662f\u4e3a\u6211\u4eec\u8981\u6d4b\u8bd5\u7684\u6bcf\u4e2a\u65b0\u6d4b\u8bd5\u7528\u4f8b\u542f\u52a8\u4e00\u4e2a\u65b0\u6d41\u7a0b\u3002 \u8ba9\u6211\u4eec\u770b\u770b\u4f1a\u662f\u4ec0\u4e48\u6837\u5b50\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if (argc > 1) {\n  std::ifstream fin;\n  fin.open(argv&#91;1]);\n  parse(fin);\n} else {\n  while (__AFL_LOOP(1000)) {\n    parse(std::cin);\n  }\n}<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610felse\u5b50\u53e5\u4e2d\u7684\u65b0while\u5faa\u73af\uff0c\u6211\u4eec\u5c061000\u4f20\u9012\u7ed9__AFL_LOOP\uff08\uff09\u51fd\u6570\u3002 \u8fd9\u544a\u8bc9AFL\u5728\u542f\u52a8\u4e00\u4e2a\u65b0\u7684\u8fc7\u7a0b\u4ee5\u8fdb\u884c\u540c\u6837\u7684\u6d4b\u8bd5\u4e4b\u524d\uff0c\u6700\u591a\u8981\u6a21\u7cca\u5904\u74061000\u4e2a\u6d4b\u8bd5\u7528\u4f8b\u3002 \u901a\u8fc7\u6307\u5b9a\u66f4\u5927\u6216\u66f4\u5c0f\u7684\u6570\u5b57\uff0c\u60a8\u53ef\u4ee5\u589e\u52a0\u6267\u884c\u6b21\u6570\uff0c\u4f46\u4ee5\u727a\u7272\u5185\u5b58\u4f7f\u7528\u4e3a\u4ee3\u4ef7\uff08\u6216\u8005\u53d7\u5185\u5b58\u6cc4\u6f0f\u7684\u652f\u914d\uff09\uff0c\u5e76\u4e14\u53ef\u4ee5\u6839\u636e\u6b63\u5728\u4f7f\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u9ad8\u5ea6\u53ef\u8c03\u3002 \u6dfb\u52a0\u8fd9\u79cd\u7c7b\u578b\u7684\u4ee3\u7801\u4ee5\u542f\u7528\u6301\u4e45\u6a21\u5f0f\u4e5f\u4e0d\u603b\u662f\u90a3\u4e48\u5bb9\u6613\u3002 \u7531\u4e8e\u542f\u52a8\u671f\u95f4\u4ea7\u751f\u7684\u8d44\u6e90\u6216\u5176\u4ed6\u56e0\u7d20\uff0c\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u53ef\u80fd\u6ca1\u6709\u652f\u6301\u8f7b\u677e\u6dfb\u52a0while\u5faa\u73af\u7684\u4f53\u7cfb\u7ed3\u6784\u3002<\/p>\n\n\n\n<p>\u56de\u5230build\u76ee\u5f55\uff0c\u91cd\u65b0\u7f16\u8bd1 \u3002 \u91cd\u65b0\u7f16\u8bd1\u9047\u5230\u95ee\u9898 afl-clang-fast++ compile \u5931\u8d25\uff0cerror 003 \u3002 \u7d22\u6027\u76f4\u63a5\u7528afl-g++<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-2\">\u6d4b\u8bd5\u4e8c\u8fdb\u5236\u6587\u4ef6<\/h1>\n\n\n\n<p>\u7a0b\u5e8f\u7f16\u8bd1\u597d\u4ee5\u540e\u53ef\u4ee5\u4f7f\u7528afl\u9644\u52a0\u7684\u5de5\u5177afl-showmap\uff0cafl-showmap \u4f1a\u8fd0\u884c\u4e00\u4e2a\u7ed9\u5b9a\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u901a\u8fc7\u6807\u51c6\u8f93\u5165\u5c06\u8f93\u5165\u4f20\u7ed9\u4e8c\u8fdb\u5236\u6587\u4ef6\uff09\u5e76\u4e14\u6253\u5370\u7a0b\u5e8f\u8fd0\u884c\u671f\u95f4\u7684\u53cd\u9988\u62a5\u544a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># afl-showmap -o \/dev\/null -- .\/parse &lt; &lt;(echo hi)\nafl-showmap 2.56b by &lt;lcamtuf@google.com>\n&#91;*] Executing '.\/parse'...\n\n-- Program output begins --\nhi\n-- Program output ends --\n&#91;+] Captured 1748 tuples in '\/dev\/null'.<\/code><\/pre>\n\n\n\n<p>\u901a\u8fc7\u5c06\u8f93\u5165\u66f4\u6539\u4e3a\u5e94\u8be5\u4f7f\u7528\u65b0\u4ee3\u7801\u8def\u5f84\u7684\u5185\u5bb9\uff0c\u4f60\u4f1a\u770b\u5230\u62a5\u544a\u672b\u5c3e\u51fa\u73b0\u7684\u5143\u7ec4\u6570\u91cf\u589e\u52a0\u6216\u51cf\u5c11\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># afl-showmap -o \/dev\/null -- .\/parse &lt; &lt;(echo hi:blah)\nafl-showmap 2.56b by &lt;lcamtuf@google.com>\n&#91;*] Executing '.\/parse'...\n\n-- Program output begins --\nhi:blah\n-- Program output ends --\n&#91;+] Captured 1771 tuples in '\/dev\/null'.<\/code><\/pre>\n\n\n\n<p>\u6b63\u5982\u6240\u770b\u5230\u7684\uff0c \u53d1\u9001\u4e86\u4e00\u4e2ayaml \u952e hi \u5c55\u793a\u4e861748\u4e2a\u53cd\u9988\u5143\u7956\uff0c\u7b2c\u4e8c\u6b21\u53d1\u9001\u4e86 hi:blah \u5c55\u793a\u4e861771\u4e2a\u53cd\u9988\u5143\u7956\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-3\">\u4f7f\u7528\u66f4\u597d\u7684\u6d4b\u8bd5\u7528\u4f8b<\/h1>\n\n\n\n<p>\u6700\u521d\u4e3a\u60a8\u7684Fuzzer\u6ce8\u5165\u6d4b\u8bd5\u7684\u7528\u4f8b\u662f\uff08\u5982\u679c\u4e0d\u662f\uff09\u6700\u91cd\u8981\u7684\u65b9\u9762\u4e4b\u4e00\uff0c\u5373\u662f\u5426\u4f1a\u770b\u5230Fuzz\u8fd0\u884c\u662f\u5426\u5bfc\u81f4\u4e00\u4e9b\u826f\u597d\u7684\u5d29\u6e83\u3002 \u5982\u524d\u6240\u8ff0\uff0cyaml-cpp\u6d4b\u8bd5\u76ee\u5f55\u4e2d\u7684specexamples.h\u6587\u4ef6\u5177\u6709\u51fa\u8272\u7684\u6d4b\u8bd5\u7528\u4f8b\uff0c\u4f9b\u6211\u4eec\u5f00\u59cb\u4f7f\u7528\uff0c\u4f46\u5b83\u4eec\u751a\u81f3\u53ef\u4ee5\u66f4\u597d\u3002 \u4e3a\u6b64\uff0c\u6211\u624b\u52a8\u5c06\u793a\u4f8b\u4ece\u5934\u6587\u4ef6\u590d\u5236\u5e76\u7c98\u8d34\u5230\u6d4b\u8bd5\u7528\u4f8b\u4e2d\uff0c\u4ee5\u8282\u7701\u8bfb\u8005\u7684\u65f6\u95f4\uff0c\u6b64\u5904\u94fe\u63a5\u7684\u662f\u6211\u7528\u4e8e\u590d\u5236\u76ee\u7684\u7684\u539f\u59cb\u79cd\u5b50\u6587\u4ef6\u3002<\/p>\n\n\n\n<p>afl \u9644\u5e26\u7684\u4e24\u4e2a\u5de5\u5177\u6211\u4eec\u53ef\u4ee5\u7528\u6765\u786e\u5b9a\uff1a<\/p>\n\n\n\n<ul><li>\u6d4b\u8bd5\u8bed\u6599\u5e93\u4e2d\u7684\u6587\u4ef6\u5c3d\u53ef\u80fd\u6709\u6548\u5730\u552f\u4e00<\/li><li>\u6bcf\u4e2a\u6d4b\u8bd5\u6587\u4ef6\u90fd\u5c3d\u53ef\u80fd\u6709\u6548\u5730\u8868\u793a\u5176\u552f\u4e00\u7684\u4ee3\u7801\u8def\u5f84<\/li><\/ul>\n\n\n\n<p>afl-cmin\u548cafl-tmin\u8fd9\u4e24\u4e2a\u5de5\u5177\u5b8c\u6210\u6240\u8c13\u7684\u201c\u6700\u5c0f\u5316\u201d\u3002 afl-cmin\u63d0\u53d6\u7ed9\u5b9a\u7684\u6f5c\u5728\u6d4b\u8bd5\u7528\u4f8b\u6587\u4ef6\u5939\uff0c\u7136\u540e\u8fd0\u884c\u6bcf\u4e2a\u7528\u4f8b\u5e76\u5c06\u63a5\u6536\u5230\u7684\u53cd\u9988\u4e0e\u6240\u6709\u5176\u4f59\u6d4b\u8bd5\u7528\u4f8b\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u627e\u5230\u6700\u4f73\u7684\u6d4b\u8bd5\u7528\u4f8b\u3002 \u6709\u6548\u5730\u8868\u8fbe\u6700\u72ec\u7279\u7684\u4ee3\u7801\u8def\u5f84\u3002 \u6700\u597d\u7684\u6d4b\u8bd5\u7528\u4f8b\u5c06\u4fdd\u5b58\u5230\u65b0\u76ee\u5f55\u3002<\/p>\n\n\n\n<p>\u53e6\u4e00\u65b9\u9762\uff0cafl-tmin\u5de5\u5177\u4ec5\u9002\u7528\u4e8e\u6307\u5b9a\u7684\u6587\u4ef6\u3002 \u5728\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\u65f6\uff0c\u6211\u4eec\u4e0d\u60f3\u6d6a\u8d39CPU\u5468\u671f\u6765\u6446\u5f04\u76f8\u5bf9\u4e8e\u6d4b\u8bd5\u7528\u4f8b\u53ef\u80fd\u8868\u793a\u7684\u4ee3\u7801\u8def\u5f84\u65e0\u7528\u7684\u4f4d\u548c\u5b57\u8282\u3002 \u4e3a\u4e86\u5c06\u6bcf\u4e2a\u6d4b\u8bd5\u7528\u4f8b\u6700\u5c0f\u5316\u5230\u8868\u793a\u4e0e\u539f\u59cb\u6d4b\u8bd5\u7528\u4f8b\u76f8\u540c\u7684\u4ee3\u7801\u8def\u5f84\u6240\u9700\u7684\u6700\u4f4e\u9650\u5ea6\uff0cafl-tmin\u904d\u5386\u6d4b\u8bd5\u7528\u4f8b\u4e2d\u7684\u5b9e\u9645\u5b57\u8282\uff0c\u9010\u6e10\u5220\u9664\u8d8a\u6765\u8d8a\u5c0f\u7684\u6570\u636e\u5757\uff0c\u76f4\u5230\u5220\u9664\u4e86\u6240\u6709 \u4e0d\u5f71\u54cd\u6240\u91c7\u7528\u7684\u4ee3\u7801\u8def\u5f84\u3002 \u6709\u70b9\u591a\uff0c\u4f46\u662f\u8fd9\u4e9b\u662f\u6709\u6548\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\u7684\u975e\u5e38\u91cd\u8981\u7684\u6b65\u9aa4\uff0c\u662f\u9700\u8981\u7406\u89e3\u7684\u91cd\u8981\u6982\u5ff5\u3002 \u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n\n\n\n<p>git\u4ed3\u5e93\u4e2d\u6211\u521b\u5efa\u4e86\u4ecespecexample.h\u6587\u4ef6\u4e2d\u7684\u539f\u59cb\u6d4b\u8bd5\u7528\u4f8b\uff0c \u6211\u4eec\u7528\u4e24\u4e2a\u6587\u4ef6\u6765\u5f00\u59cb\u3002<\/p>\n\n\n\n<p>1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Mark McGwire\nSammy Sosa\nKen Griffey<\/code><\/pre>\n\n\n\n<p>2<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>hr:  65    # Home runs\navg: 0.278 # Batting average\nrbi: 147   # Runs Batted In<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># afl-tmin -i in\/1 -o in\/1.min -- .\/parse\nafl-tmin 2.56b by &lt;lcamtuf@google.com>\n\n&#91;+] Read 36 bytes from 'in\/1'.\n&#91;*] Performing dry run (mem limit = 50 MB, timeout = 1000 ms)...\n&#91;+] Program terminates normally, minimizing in instrumented mode.\n&#91;*] Stage #0: One-time block normalization...\n&#91;+] Block normalization complete, 12 bytes replaced.\n&#91;*] --- Pass #1 ---\n&#91;*] Stage #1: Removing blocks of data...\n    Block length = 2, remaining size = 36\n    Block length = 1, remaining size = 36\n&#91;+] Block removal complete, 0 bytes deleted.\n&#91;*] Stage #2: Minimizing symbols (16 code points)...\n&#91;+] Symbol minimization finished, 13 symbols (18 bytes) replaced.\n&#91;*] Stage #3: Character minimization...\n&#91;+] Character minimization done, 0 bytes replaced.\n&#91;*] --- Pass #2 ---\n&#91;*] Stage #1: Removing blocks of data...\n    Block length = 2, remaining size = 36\n    Block length = 1, remaining size = 36\n&#91;+] Block removal complete, 0 bytes deleted.\n\n     File size reduced by : 0.00% (to 36 bytes)\n    Characters simplified : 83.33%\n     Number of execs done : 96\n          Fruitless execs : path=79 crash=0 hang=0\n\n&#91;*] Writing output to 'in\/1.min'...\n&#91;+] We're done here. Have a nice day!\n\n# cat 1.min\n0000 0000000\n00000 0000\n000 0000000<\/code><\/pre>\n\n\n\n<p>\u8fd9\u662fAFL\u529f\u80fd\u5f3a\u5927\u7684\u4e00\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50\u3002 AFL\u4e0d\u77e5\u9053YAML\u662f\u4ec0\u4e48\u6216\u5b83\u7684\u8bed\u6cd5\u662f\u4ec0\u4e48\uff0c\u4f46\u662f\u5b83\u5b9e\u9645\u4e0a\u80fd\u591f\u5c06\u4e0d\u662f\u7528\u4e8e\u8868\u793a\u952e\u503c\u5bf9\u7684\u7279\u6b8aYAML\u5b57\u7b26\u7684\u6240\u6709\u5b57\u7b26\u5f52\u96f6\u3002 \u901a\u8fc7\u786e\u5b9a\u66f4\u6539\u8fd9\u4e9b\u7279\u5b9a\u5b57\u7b26\u5c06\u6781\u5927\u5730\u6539\u53d8\u5df2\u68c0\u6d4b\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u53cd\u9988\uff0c\u4fbf\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u5e76\u4e14\u5e94\u5c06\u5b83\u4eec\u5355\u72ec\u653e\u7f6e\u3002 \u5b83\u8fd8\u4ece\u539f\u59cb\u6587\u4ef6\u4e2d\u5220\u9664\u4e86\u56db\u4e2a\u5b57\u8282\uff0c\u8fd9\u4e9b\u5b57\u8282\u4e0d\u4f1a\u5f71\u54cd\u6240\u91c7\u7528\u7684\u4ee3\u7801\u8def\u5f84\uff0c\u56e0\u6b64\uff0c\u8fd9\u5c06\u51cf\u5c11\u56db\u4e2a\u5b57\u8282\uff0c\u8fd9\u5c06\u6d6a\u8d39CPU\u5468\u671f\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u5feb\u901f\u6700\u5c0f\u5316\u5f00\u59cb\u7684\u6d4b\u8bd5\u8bed\u6599\u5e93\uff0c\u6211\u901a\u5e38\u4f7f\u7528quick for\u5faa\u73af\u5c06\u6bcf\u4e2a\u6700\u5c0f\u5316\u4e3a\u4e00\u4e2a\u65b0\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u6269\u5c55\u4e3a.min\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># for i in *; do afl-tmin -i $i -o $i.min -- ~\/parse; done;\n# mkdir ~\/testcases &amp;&amp; cp *.min ~\/testcases<\/code><\/pre>\n\n\n\n<p>\u6b64for\u5faa\u73af\u5c06\u904d\u5386\u5f53\u524d\u76ee\u5f55\u4e2d\u7684\u6bcf\u4e2a\u6587\u4ef6\uff0c\u5e76\u4f7f\u7528afl-tmin\u5c06\u5176\u6700\u5c0f\u5316\u4e3a\u4e00\u4e2a\u4e0e\u7b2c\u4e00\u4e2a\u6587\u4ef6\u540c\u540d\u7684\u65b0\u6587\u4ef6\uff0c\u53ea\u662f\u5728\u6587\u4ef6\u540e\u6dfb\u52a0.min\u3002 \u8fd9\u6837\uff0c\u6211\u53ef\u4ee5\u4ec5\u5c06cp * .min cp\u5230\u7528\u4e8e\u5c06AFL\u7528\u4f5c\u79cd\u5b50\u7684\u6587\u4ef6\u5939\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-4\">\u5f00\u59cbfuzz<\/h1>\n\n\n\n<p>\u8fd9\u662f\u5927\u591a\u6570\u4ee4\u4eba\u8d39\u89e3\u7684\u6f14\u7ec3\u7684\u7ed3\u5c3e\u90e8\u5206\uff0c\u4f46\u662f\u6211\u5411\u60a8\u4fdd\u8bc1\uff0c\u8fd9\u4ec5\u4ec5\u662f\u5f00\u59cb\uff01\u65e2\u7136\u6211\u4eec\u5df2\u7ecf\u6709\u4e86\u4e00\u5957\u9ad8\u8d28\u91cf\u7684\u6d4b\u8bd5\u7528\u4f8b\u6765\u4f5c\u4e3aAFL\u7684\u79cd\u5b50\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5f00\u59cb\u4e86\u3002\u53ef\u9009\u5730\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5229\u7528\u5b57\u5178\u6807\u8bb0\u529f\u80fd\u4e3aYFL\u7279\u6b8a\u5b57\u7b26\u6dfb\u52a0AFL\u79cd\u5b50\uff0c\u4ee5\u589e\u52a0\u6548\u529b\uff0c\u4f46\u6211\u5c06\u5176\u4f5c\u4e3a\u7ec3\u4e60\u7559\u7ed9\u8bfb\u8005\u3002<\/p>\n\n\n\n<p>AFL\u6709\u4e24\u79cd\u6a21\u7cca\u6d4b\u8bd5\u7b56\u7565\uff0c\u4e00\u79cd\u662f\u786e\u5b9a\u6027\u7b56\u7565\uff0c\u53e6\u4e00\u79cd\u662f\u968f\u673a\u4e14\u6df7\u4e71\u7684\u7b56\u7565\u3002\u542f\u52a8afl-fuzz\u5b9e\u4f8b\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u5e0c\u671b\u8be5fuzz\u5b9e\u4f8b\u9075\u5faa\u7684\u7b56\u7565\u7c7b\u578b\u3002\u4e00\u822c\u800c\u8a00\uff0c\u60a8\u53ea\u9700\u8981\u4e00\u4e2a\u786e\u5b9a\u6027\uff08\u6216\u4e3b\uff09\u6a21\u7cca\u5668\uff0c\u4f46\u662f\u60a8\u53ef\u4ee5\u4f7f\u7528\u76d2\u5b50\u53ef\u4ee5\u5904\u7406\u7684\u4efb\u610f\u6570\u91cf\uff08\u6216\u4ece\u5c5e\uff09\u6a21\u7cca\u5668\u3002\u5982\u679c\u60a8\u8fc7\u53bb\u66fe\u7ecf\u4f7f\u7528\u8fc7AFL\uff0c\u4f46\u4e0d\u77e5\u9053\u8fd9\u662f\u5728\u8bf4\u4ec0\u4e48\uff0c\u90a3\u4e48\u60a8\u4ee5\u524d\u53ef\u80fd\u53ea\u8fd0\u884c\u8fc7\u4e00\u4e2aafl-fuzz\u5b9e\u4f8b\u3002\u5982\u679c\u672a\u6307\u5b9a\u6a21\u7cca\u6d4b\u8bd5\u7b56\u7565\uff0c\u5219afl-fuzz\u5b9e\u4f8b\u5c06\u5728\u6bcf\u4e2a\u7b56\u7565\u4e4b\u95f4\u6765\u56de\u5207\u6362\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>afl-fuzz -i in -o out .\/parse -M fuzzer1 -- .\/parse\nafl-fuzz -i in -o out .\/parse -S fuzzer2 -- .\/parse<\/code><\/pre>\n\n\n\n<p>\u547d\u4ee4\u4e2d\u4f7f\u7528\u7684\u53c2\u6570-M\u548c-S\u3002 \u901a\u8fc7\u5c06-M fuzzer1\u4f20\u9012\u7ed9afl-fuzz\uff0c\u6211\u544a\u8bc9\u5b83\u662fMaster fuzzer\uff08\u4f7f\u7528\u786e\u5b9a\u6027\u7b56\u7565\uff09\uff0c\u5e76\u4e14fuzz\u5b9e\u4f8b\u7684\u540d\u79f0\u4e3afuzzer1\u3002 \u53e6\u4e00\u65b9\u9762\uff0c\u4f20\u9012\u7ed9\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u7684-S fuzzer2\u8868\u793a\u4f7f\u7528\u968f\u673a\uff0c\u6df7\u4e71\u7684\u7b56\u7565\u5e76\u4ee5fuzzer2\u7684\u540d\u79f0\u8fd0\u884c\u5b9e\u4f8b\u3002 \u8fd9\u4e24\u4e2a\u6a21\u7cca\u5668\u5c06\u5f7c\u6b64\u914d\u5408\u5de5\u4f5c\uff0c\u5e76\u5728\u53d1\u73b0\u65b0\u7684\u4ee3\u7801\u8def\u5f84\u65f6\u6765\u56de\u4f20\u9012\u65b0\u7684\u6d4b\u8bd5\u7528\u4f8b\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-5\">\u4ec0\u4e48\u65f6\u5019\u7ed3\u675f<\/h1>\n\n\n\n<p>\u4e00\u65e6\u6a21\u7cca\u6d4b\u8bd5\u5668\u8fd0\u884c\u4e86\u76f8\u5bf9\u8f83\u957f\u7684\u65f6\u95f4\uff08\u6211\u60f3\u7b49\u5230\u4e3b\u6a21\u7cca\u6d4b\u8bd5\u5668\u81f3\u5c11\u5b8c\u6210\u5b83\u7684\u7b2c\u4e00\u4e2a\u5468\u671f\uff0c\u4ece\u5c5e\u5b9e\u4f8b\u901a\u5e38\u5230\u90a3\u65f6\u624d\u5b8c\u6210\u8bb8\u591a\u5468\u671f\uff09\uff0c\u6211\u4eec\u4e0d\u5e94\u8be5\u53ea\u662f\u505c\u6b62\u5de5\u4f5c\u5e76\u5f00\u59cb\u67e5\u770b\u5d29\u6e83\u3002\u5728\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\u65f6\uff0cAFL\u6709\u671b\u521b\u5efa\u5927\u91cf\u65b0\u7684\u6d4b\u8bd5\u7528\u4f8b\u96c6\uff0c\u5176\u4e2d\u4ecd\u7136\u53ef\u80fd\u5b58\u5728\u6f0f\u6d1e\u3002\u6211\u4eec\u5e94\u8be5\u5c3d\u53ef\u80fd\u5730\u51cf\u5c11\u8fd9\u79cd\u65b0\u8bed\u6599\uff0c\u7136\u540e\u91cd\u65b0\u64ad\u79cd\u6211\u4eec\u7684\u6a21\u7cca\u5668\uff0c\u8ba9\u5b83\u4eec\u8fd0\u884c\u66f4\u591a\u3002\u8fd9\u662f\u6ca1\u6709\u6f14\u7ec3\u8ba8\u8bba\u7684\u8fc7\u7a0b\uff0c\u56e0\u4e3a\u5b83\u5f88\u65e0\u804a\uff0c\u4e4f\u5473\u5e76\u4e14\u53ef\u80fd\u9700\u8981\u5f88\u957f\u65f6\u95f4\uff0c\u4f46\u662f\u5bf9\u4e8e\u9ad8\u6548\u7684\u6a21\u7cca\u6d4b\u8bd5\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<p>yaml-cpp\u89e3\u6790\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u4e3b\u6a21\u7cca\u5668\u5b8c\u6210\u7b2c\u4e00\u4e2a\u5468\u671f\uff08\u5bf9\u6211\u6765\u8bf4\uff0c\u8fd9\u5927\u7ea6\u82b1\u4e8610\u4e2a\u5c0f\u65f6\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u666e\u901a\u7684\u5de5\u4f5c\u7ad9\u6765\u8bf4\uff0c\u5b83\u53ef\u80fd\u8981\u82b124\u4e2a\u5c0f\u65f6\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u5e76\u505c\u6b62\u6211\u4eec\u7684afl-fuzz\u5b9e\u4f8b\u3002\u6211\u4eec\u9700\u8981\u5408\u5e76\u5e76\u6700\u5c0f\u5316\u6bcf\u4e2a\u5b9e\u4f8b\u7684\u961f\u5217\uff0c\u7136\u540e\u518d\u6b21\u91cd\u65b0\u5f00\u59cb\u6a21\u7cca\u6d4b\u8bd5\u3002\u5f53\u4f7f\u7528\u591a\u4e2a\u6a21\u7cca\u6d4b\u8bd5\u5b9e\u4f8b\u8fd0\u884c\u65f6\uff0cAFL\u5c06\u5728\u60a8\u6307\u5b9a\u4e3aafl-fuzz\u7684\u53c2\u6570\u7684\u8f93\u51fa\u6587\u4ef6\u5185\u90e8\u4e3a\u6bcf\u4e2a\u6a21\u7cca\u6d4b\u8bd5\u7ef4\u62a4\u4e00\u4e2a\u5355\u72ec\u7684\u540c\u6b65\u76ee\u5f55\u3002\u6bcf\u4e2a\u5355\u72ec\u7684\u6a21\u7cca\u5668\u8f93\u51fa\u6587\u4ef6\u90fd\u5305\u542b\u4e00\u4e2a\u961f\u5217\u76ee\u5f55\uff0c\u5176\u4e2d\u5305\u542bAFL\u80fd\u591f\u751f\u6210\u7684\u6240\u6709\u6d4b\u8bd5\u7528\u4f8b\uff0c\u8fd9\u4e9b\u6d4b\u8bd5\u7528\u4f8b\u5bfc\u81f4\u4e86\u503c\u5f97\u68c0\u67e5\u7684\u65b0\u4ee3\u7801\u8def\u5f84\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u9700\u8981\u5408\u5e76\u6bcf\u4e2a\u6a21\u7cca\u5b9e\u4f8b\u7684\u961f\u5217\u76ee\u5f55\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f1a\u6709\u5f88\u591a\u91cd\u53e0\uff0c\u7136\u540e\u5c06\u8fd9\u7ec4\u65b0\u7684\u6d4b\u8bd5\u6570\u636e\u6700\u5c0f\u5316\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># cd out\n# ls\nfuzzer1 fuzzer2\n# mkdir queue_all\n# afl-cmin -i queue_all\/ -o queue_cmin -- ..\/parse\ncorpus minimization tool for afl-fuzz by &lt;lcamtuf@google.com>\n\n&#91;*] Testing the target binary...\n&#91;+] OK, 1780 tuples recorded.\n&#91;*] Obtaining traces for input files in 'queue_all\/'...\n    Processing file 7483\/7483... \n&#91;*] Sorting trace sets (this may take a while)...\n&#91;+] Found 37265 unique tuples across 7483 files.\n&#91;*] Finding best candidates for each tuple...\n    Processing file 7483\/7483... \n&#91;*] Sorting candidate list (be patient)...\n&#91;*] Processing candidates and writing output files...\n    Processing tuple 37265\/37265... \n&#91;+] Narrowed down to 1252 files, saved in 'queue_cmin'.<\/code><\/pre>\n\n\n\n<p>\u901a\u8fc7afl-cmin\u8fd0\u884c\u751f\u6210\u7684\u961f\u5217\u540e\uff0c\u6211\u4eec\u9700\u8981\u6700\u5c0f\u5316\u6bcf\u4e2a\u751f\u6210\u7684\u6587\u4ef6\uff0c\u4ee5\u514d\u5c06CPU\u5468\u671f\u6d6a\u8d39\u5728\u4e0d\u9700\u8981\u7684\u5b57\u8282\u4e0a\u3002 \u4f46\u662f\uff0c\u4e0e\u4ec5\u4ec5\u6700\u5c0f\u5316\u5f00\u59cb\u7684\u6d4b\u8bd5\u7528\u4f8b\u76f8\u6bd4\uff0c\u73b0\u5728\u7684\u6587\u4ef6\u8981\u591a\u5f97\u591a\u3002 \u4e00\u4e2a\u7528\u4e8e\u6700\u5c0f\u5316\u6570\u5343\u4e2a\u6587\u4ef6\u7684\u7b80\u5355for\u5faa\u73af\u53ef\u80fd\u9700\u8981\u51e0\u5929\u7684\u65f6\u95f4\uff0c\u800c\u4e14\u6ca1\u6709\u4eba\u6709\u65f6\u95f4\u8fd9\u6837\u505a\u3002 \u968f\u7740\u65f6\u95f4\u7684\u6d41\u901d\uff0c\u6211\u5199\u4e86\u4e00\u4e2a\u53eb\u505aafl-ptmin\u7684\u5c0f\u578bbash\u811a\u672c\uff0c\u8be5\u811a\u672c\u5c06afl-tmin\u5e76\u884c\u5316\u4e3a\u4e00\u5b9a\u6570\u91cf\u7684\u8fdb\u7a0b\uff0c\u5e76\u88ab\u8bc1\u660e\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u901f\u5ea6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#!\/bin\/bash\n\ncores=$1\ninputdir=$2\noutputdir=$3\npids=\"\"\ntotal=`ls $inputdir | wc -l`\n\nfor k in `seq 1 $cores $total`\ndo\n  for i in `seq 0 $(expr $cores - 1)`\n  do\n    file=`ls -Sr $inputdir | sed $(expr $i + $k)\"q;d\"`\n    echo $file\n    afl-tmin -i $inputdir\/$file -o $outputdir\/$file -- ~\/parse &amp;\n  done\n\n  wait\ndone<\/code><\/pre>\n\n\n\n<p>\u4e0eafl-fuzz\u5b9e\u4f8b\u4e00\u6837\uff0c\u6211\u5efa\u8bae\u4ecd\u5728\u5c4f\u5e55\u4f1a\u8bdd\u4e2d\u8fd0\u884c\u6b64\u5b9e\u4f8b\uff0c\u4ee5\u514d\u7f51\u7edc\u6545\u969c\u6216\u5173\u95ed\u7684\u7ec8\u7aef\u5f15\u8d77\u60a8\u7684\u75db\u82e6\u548c\u75db\u82e6\u3002 \u5b83\u7684\u7528\u6cd5\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u4e09\u4e2a\u53c2\u6570\uff0c\u5373\u8981\u542f\u52a8\u7684\u8fdb\u7a0b\u6570\uff0c\u8981\u6700\u5c0f\u5316\u6d4b\u8bd5\u7528\u4f8b\u7684\u76ee\u5f55\u4ee5\u53ca\u8981\u5199\u5165\u6700\u5c0f\u5316\u7684\u6d4b\u8bd5\u7528\u4f8b\u7684\u8f93\u51fa\u76ee\u5f55\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>~\/afl-ptmin 8 .\/queue_cmin\/ .\/queue\/<\/code><\/pre>\n\n\n\n<p>\u5373\u4f7f\u8fdb\u884c\u4e86\u5e76\u884c\u5316\uff0c\u6b64\u8fc7\u7a0b\u4ecd\u53ef\u80fd\u9700\u8981\u4e00\u6bb5\u65f6\u95f4\uff0824\u5c0f\u65f6\u4ee5\u4e0a\uff09\u3002 \u5bf9\u4e8e\u4f7f\u7528yaml-cpp\u751f\u6210\u7684\u8bed\u6599\u5e93\uff0c\u5b83\u5e94\u8be5\u80fd\u591f\u5728\u4e00\u4e2a\u5c0f\u65f6\u5de6\u53f3\u5185\u5b8c\u6210\u3002 \u5b8c\u6210\u540e\uff0c\u6211\u4eec\u5e94\u8be5\u4ece\u5404\u4e2a\u6a21\u7cca\u5668syncdir\u4e2d\u5220\u9664\u5148\u524d\u7684\u961f\u5217\u76ee\u5f55\uff0c\u7136\u540e\u590d\u5236\u961f\u5217\/\u6587\u4ef6\u5939\u4ee5\u66ff\u6362\u65e7\u7684\u961f\u5217\u6587\u4ef6\u5939\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># rm -rf fuzzer1\/queue\n# rm -rf fuzzer2\/queue\n# cp -r queue\/ fuzzer1\/queue\n# cp -r queue\/ fuzzer2\/queue<\/code><\/pre>\n\n\n\n<p>\u5f53\u6709\u4e86\u65b0\u7684\u961f\u5217\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u91cd\u65b0\u5f00\u59cbfuzz.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#afl-fuzz -i- -o syncdir\/ -S fuzzer2 -- .\/parse\n#afl-fuzz -i- -o syncdir\/ -M fuzzer1 -- .\/parse<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u60a8\u6ce8\u610f\u5230\u4e86\uff0c\u6211\u4eec\u6ca1\u6709\u5728\u6bcf\u6b21\u8c03\u7528afl-fuzz\u65f6\u90fd\u5c06-i\u53c2\u6570\u4f20\u9012\u7ed9\u76ee\u5f55\u4ee5\u8bfb\u53d6\u6d4b\u8bd5\u7528\u4f8b\uff0c\u800c\u662f\u7b80\u5355\u5730\u4f20\u9012\u4e86\u4e00\u4e2a\u8fde\u5b57\u7b26\u3002 \u8fd9\u544a\u8bc9AFL\u4ec5\u5c06\u8be5\u6a21\u7cca\u5668\u7684syncdir\u4e2d\u7684queue \/\u76ee\u5f55\u7528\u4f5c\u79cd\u5b50\u76ee\u5f55\uff0c\u7136\u540e\u4ece\u90a3\u91cc\u5f00\u59cb\u5907\u4efd\u3002<\/p>\n\n\n\n<p>\u6574\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u542f\u52a8\u6a21\u7cca\u6d4b\u8bd5\u4f5c\u4e1a\uff0c\u7136\u540e\u505c\u6b62\u4ee5\u6700\u5c0f\u5316\u961f\u5217\uff0c\u7136\u540e\u91cd\u65b0\u542f\u52a8\u4f5c\u4e1a\uff0c\u53ef\u4ee5\u6839\u636e\u60a8\u7684\u9700\u8981\u8fdb\u884c\u591a\u6b21\uff08\u901a\u5e38\u76f4\u5230\u611f\u5230\u65e0\u804a\u6216\u505c\u6b62\u5bfb\u627e\u65b0\u7684\u4ee3\u7801\u8def\u5f84\u4e3a\u6b62\uff09\u3002 \u8fd8\u5e94\u8be5\u7ecf\u5e38\u8fd9\u6837\u505a\uff0c\u56e0\u4e3a\u5426\u5219\u60a8\u5c06\u6d6a\u8d39\u7535\u8d39\uff0c\u6d6a\u8d39\u5b57\u8282\uff0c\u4ee5\u540e\u518d\u4e5f\u4e0d\u4f1a\u4ed8\u7ed9\u60a8\u4efb\u4f55\u8d39\u7528\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-6\">\u5d29\u6e83\u5206\u7c7b<\/h1>\n\n\n\n<p>\u6a21\u7cca\u6d4b\u8bd5\u751f\u547d\u5468\u671f\u4e2d\u53e6\u4e00\u4e2a\u4f20\u7edf\u4e4f\u5473\u7684\u90e8\u5206\u662f\u5bf9\u60a8\u7684\u53d1\u73b0\u8fdb\u884c\u5206\u7c7b\u3002 \u5e78\u8fd0\u7684\u662f\uff0c\u5df2\u7ecf\u7f16\u5199\u4e86\u4e00\u4e9b\u5f88\u68d2\u7684\u5de5\u5177\u6765\u5e2e\u52a9\u6211\u4eec\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u5f88\u597d\u7684\u5de5\u5177 crashwalk \uff08by @rantyben\uff09\uff0c \u5b83\u4f1a\u81ea\u52a8\u6267\u884cgdb\u548c\u4e00\u4e2a\u7279\u6b8a\u7684gdb\u63d2\u4ef6\uff0c\u4ee5\u5feb\u901f\u786e\u5b9a\u54ea\u4e9b\u5d29\u6e83\u53ef\u80fd\u5bfc\u81f4\u53ef\u5229\u7528\u7684\u6761\u4ef6\uff0c\u4e5f\u53ef\u80fd\u4e0d\u4f1a\u5bfc\u81f4\u53ef\u5229\u7528\u7684\u6761\u4ef6\u3002 \u65e0\u8bba\u5982\u4f55\uff0c\u8fd9\u5e76\u4e0d\u662f\u4e07\u65e0\u4e00\u5931\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u786e\u5b9e\u53ef\u4ee5\u8ba9\u60a8\u6709\u4e00\u4e9b\u5148\u53d1\u5236\u4eba\u7684\u673a\u4f1a\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9996\u5148\u8981\u96c6\u4e2d\u7cbe\u529b\u5e94\u5bf9\u5d29\u6e83\u3002 \u5b89\u88c5\u5b83\u76f8\u5bf9\u7b80\u5355\uff0c\u4f46\u662f\u6211\u4eec\u9996\u5148\u9700\u8981\u4e00\u4e9b\u4f9d\u8d56\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># apt-get install gdb golang\n# mkdir src\n# cd src\n# git clone https:\/\/github.com\/jfoote\/exploitable.git\n# cd &amp;&amp; mkdir go\n# export GOPATH=~\/go\n# go get -u github.com\/bnagy\/crashwalk\/cmd\/\u2026<\/code><\/pre>\n\n\n\n<p>\u5f53crashwalk \u5b89\u88c5\u5728 ~\/go\/bin\/ , \u6211\u4eec\u53ef\u4ee5\u5206\u6790\u6587\u4ef6\u770b\u5b83\u662f\u5426\u53ef\u80fd\u6709\u53ef\u5229\u7528\u7684bug\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># ~\/go\/bin\/cwtriage -root syncdir\/fuzzer1\/crashes\/ -match id -- ~\/parse @@<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-7\">\u786e\u5b9a\u6709\u6548\u6027\u548c\u4ee3\u7801\u8986\u76d6\u7387<\/h1>\n\n\n\n<p>\u67e5\u627e\u5d29\u6e83\u662f\u4e00\u4ef6\u975e\u5e38\u6709\u8da3\u7684\u4e8b\u60c5\uff0c\u4f46\u662f\uff0c\u5982\u679c\u65e0\u6cd5\u91cf\u5316\u4e8c\u8fdb\u5236\u6587\u4ef6\u4e2d\u53ef\u7528\u4ee3\u7801\u8def\u5f84\u7684\u8fd0\u884c\u72b6\u51b5\uff0c\u5c31\u50cf\u5728\u9ed1\u6697\u4e2d\u62cd\u7167\u4e00\u6837\u3002\u901a\u8fc7\u786e\u8ba4\u4ee3\u7801\u7684\u54ea\u4e2a\u4f60\u6ca1\u6709\u5230\u8fbe\u4f60\u53ef\u4ee5\u66f4\u597d\u7684\u8c03\u6574\u6d4b\u8bd5\u7528\u4f8b\u6765\u8fbe\u5230\u4f60\u6ca1\u5230\u8fbe\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<p>\u4e00\u6b3e\u540d\u4e3aafl-cov \u7684\u51fa\u8272\u5de5\u5177\uff08by @michaelrash \uff09 \uff0c \u4ee5\u901a\u8fc7\u5728\u67e5\u627e\u65b0\u8def\u5f84\u65f6\u89c2\u5bdf\u6a21\u7cca\u76ee\u5f55\u5e76\u7acb\u5373\u8fd0\u884c\u6d4b\u8bd5\u7528\u4f8b\u6765\u67e5\u627e\u60a8\u53ef\u80fd\u9047\u5230\u7684\u4ee3\u7801\u5e93\u7684\u65b0\u8986\u76d6\u8303\u56f4\uff0c\u4ece\u800c\u5e2e\u52a9\u60a8\u89e3\u51b3\u6b64\u786e\u5207\u95ee\u9898\u3002\u5b83\u4f7f\u7528lcov\u5b8c\u6210\u6b64\u64cd\u4f5c\uff0c\u56e0\u6b64\u5728\u7ee7\u7eed\u4e4b\u524d\uff0c\u6211\u4eec\u5b9e\u9645\u4e0a\u5fc5\u987b\u4f7f\u7528\u4e00\u4e9b\u7279\u6b8a\u9009\u9879\u91cd\u65b0\u7f16\u8bd1\u89e3\u6790\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># cd ~\/yaml-cpp\/build\/\n# rm -rf .\/*\n# cmake -DCMAKE_CXX_FLAGS=\"-O0 -fprofile-arcs -ftest-coverage\" \\\n-DCMAKE_EXE_LINKER_FLAGS=\"-fprofile-arcs -ftest-coverage\" ..\n# make\n# cp util\/parse ~\/parse_cov<\/code><\/pre>\n\n\n\n<p>\u6709\u4e86\u8fd9\u4e2a\u65b0\u7684\u89e3\u6790\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0cafl-cov\u53ef\u4ee5\u5c06\u7ed9\u5b9a\u8f93\u5165\u4e2d\u4e8c\u8fdb\u5236\u6587\u4ef6\u4e2d\u91c7\u7528\u7684\u4ee3\u7801\u8def\u5f84\u4e0e\u6587\u4ef6\u7cfb\u7edf\u4e0a\u7684\u4ee3\u7801\u94fe\u63a5\u8d77\u6765\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>afl-cov\/afl-cov -d ~\/syncdir\/ --live --coverage-cmd \"~\/parse_cov AFL_FILE\" --code-dir ~\/yaml-cpp\/<\/code><\/pre>\n\n\n\n<p>\u5b8c\u6210\u540e\uff0cafl-cov\u5728\u540d\u4e3acov\u7684\u76ee\u5f55\u4e2d\u7684\u6839syncdir\u4e2d\u751f\u6210\u62a5\u544a\u4fe1\u606f\u3002 \u8fd9\u5305\u62ec\u53ef\u4ee5\u5728Web\u6d4f\u89c8\u5668\u4e2d\u8f7b\u677e\u67e5\u770b\u7684HTML\u6587\u4ef6\uff0c\u5176\u4e2d\u8be6\u7ec6\u8bf4\u660e\u4e86\u54ea\u4e9b\u529f\u80fd\u548c\u4ee3\u7801\u884c\u88ab\u547d\u4e2d\uff0c\u4ee5\u53ca\u54ea\u4e9b\u529f\u80fd\u548c\u4ee3\u7801\u884c\u672a\u88ab\u547d\u4e2d\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-8\">\u6700\u540e<\/h1>\n\n\n\n<p>\u5728\u82b1\u4e86\u4e09\u5929\u7684\u65f6\u95f4\u5145\u5b9e\u4e86\u8fd9\u4e9b\u4e4b\u540e\uff0c\u6211\u53d1\u73b0yaml-cpp\u4e2d\u6ca1\u6709\u6f5c\u5728\u7684\u53ef\u5229\u7528\u9519\u8bef\u3002 \u8fd9\u662f\u5426\u610f\u5473\u7740\u4e0d\u5b58\u5728\u4efb\u4f55\u9519\u8bef\uff0c\u4e5f\u4e0d\u503c\u5f97\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\uff1f \u5f53\u7136\u4e0d\u662f\u3002 \u5728\u6211\u4eec\u7684\u884c\u4e1a\u4e2d\uff0c\u6211\u8ba4\u4e3a\u5173\u4e8e\u6f0f\u6d1e\u53d1\u73b0\u65b9\u9762\u7684\u5931\u8d25\uff0c\u6211\u4eec\u53d1\u8868\u7684\u6587\u7ae0\u4e0d\u591f\u591a\u3002 \u8bb8\u591a\u4eba\u53ef\u80fd\u4e0d\u60f3\u627f\u8ba4\u4ed6\u4eec\u4ed8\u51fa\u4e86\u5f88\u591a\u7cbe\u529b\u548c\u65f6\u95f4\u6765\u5b8c\u6210\u67d0\u4e9b\u4e8b\u60c5\uff0c\u800c\u5176\u4ed6\u4eba\u53ef\u80fd\u8ba4\u4e3a\u8fd9\u662f\u5f92\u52b3\u7684\u3002 \u672c\u7740\u5f00\u653e\u7684\u7cbe\u795e\uff0c\u4e0b\u9762\u94fe\u63a5\u7684\u662f\u6240\u6709\u751f\u6210\u7684\u8bed\u6599\u5e93\uff08\u5b8c\u5168\u6700\u5c0f\u5316\uff09\uff0c\u79cd\u5b50\u548c\u4ee3\u7801\u8986\u76d6\u7387\u7ed3\u679c\uff08\u7ea670\uff05\u7684\u4ee3\u7801\u8986\u76d6\u7387\uff09\uff0c\u4ee5\u4fbf\u5176\u4ed6\u4eba\u53ef\u4ee5\u4f7f\u7528\u5b83\u4eec\u5e76\u786e\u5b9a\u662f\u5426\u503c\u5f97\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5 \u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p><a href=\"https:\/\/github.com\/brandonprry\/yaml-fuzz\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/github.com\/brandonprry\/yaml-fuzz<\/a><\/p><p><a href=\"https:\/\/foxglovesecurity.com\/2016\/03\/15\/fuzzing-workflows-a-fuzz-job-from-start-to-finish\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/foxglovesecurity.com\/2016\/03\/15\/fuzzing-workflows-a-fuzz-job-from-start-to-finish\/<\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5e0c\u671b\u4ece\u5934\u5230\u5c3e\u5b8c\u6210\u4e00\u9879\u6a21\u7cca\u7684\u5de5\u4f5c\u3002 \u8fd9\u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d\uff1f \u9996\u5148\uff0c\u5373\u4f7f\u627e\u5230\u4e00\u4e2a\u597d\u7684\u8f6f\u4ef6\u6765 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7,6],"tags":[],"_links":{"self":[{"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/posts\/66"}],"collection":[{"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pareto.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=66"}],"version-history":[{"count":1,"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions"}],"predecessor-version":[{"id":67,"href":"http:\/\/pareto.fun\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions\/67"}],"wp:attachment":[{"href":"http:\/\/pareto.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=66"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pareto.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=66"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pareto.fun\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=66"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}