{"id":6340,"date":"2023-11-15T20:43:26","date_gmt":"2023-11-15T11:58:26","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=6340"},"modified":"2023-11-15T20:43:26","modified_gmt":"2023-11-15T11:58:26","slug":"%e3%80%90%e8%ae%ba%e6%96%87%e5%88%86%e4%ba%ab%e3%80%91fuzzing-sgx-enclaves-via-host-program-mutations","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=6340","title":{"rendered":"\u3010\u8bba\u6587\u5206\u4eab\u3011Fuzzing SGX Enclaves via Host Program Mutations"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u672c\u6b21\u4ecb\u7ecd\u7684\u8bba\u6587\u4f7f\u7528\u7a0b\u5e8f\u53d8\u5f02\uff08program mutation\uff09\u7ed3\u5408\u6a21\u7cca\u6d4b\u8bd5\uff08fuzzing\uff09\u7684\u65b9\u6cd5\uff0c\u9488\u5bf9\u82f1\u7279\u5c14\u53ef\u4fe1\u6267\u884c\u73af\u5883SGX\u5e94\u7528\u8fdb\u884c\u6f0f\u6d1e\u6316\u6398\u3002\u8bba\u6587\u53d1\u8868\u4e8eEuro S&amp;P 2023\uff0c\u4f5c\u8005\u56e2\u961f\u6765\u81ea\u4e8e\u666e\u6e21\u5927\u5b66\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">01 <strong>\u7814\u7a76\u80cc\u666f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u968f\u7740\u6f0f\u6d1e\u6316\u6398\u6280\u672f\u548c\u653b\u51fb\u624b\u6cd5\u7684\u4e0d\u65ad\u8fed\u4ee3\uff0c\u653b\u51fb\u8005\u5f80\u5f80\u53ef\u4ee5\u901a\u8fc7\u653b\u7834\u9ad8\u6743\u9650\u4ee3\u7801\uff08\u7cfb\u7edf\u5185\u6838\u3001\u865a\u62df\u673a\u76d1\u89c6\u5668\u7b49\uff09\u7a83\u53d6\u7528\u6237\u7684\u673a\u5bc6\u6570\u636e\u3002\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u79cd\u5a01\u80c1\uff0c\u5382\u5546\u63d0\u51fa\u4e86\u53ef\u884c\u6267\u884c\u73af\u5883\uff08TEE\uff0cTrusted Execution Environment\uff09\u6280\u672f\uff0c\u5176\u672c\u8d28\u662f\u4e00\u79cd\u9694\u79bb\u7684\u8fd0\u884c\u65f6\u73af\u5883\uff0c\u786e\u4fdd\u4e86\u7528\u6237\u6570\u636e\u3001\u4ee3\u7801\u5728\u53ef\u4fe1\u6267\u884c\u73af\u5883\u4e2d\u7684\u673a\u5bc6\u6027\u548c\u5b8c\u6574\u6027\u3002SGX\uff08Software Guard Extensions\uff09\u662fIntel\u516c\u53f8\u5f00\u53d1\u7684\u4e00\u79cdTEE\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002SGX\u63d0\u4f9b\u4e86\u4e00\u79cd\u673a\u5236\uff08\u5176\u672c\u8d28\u4e3a\u4e00\u7ec4\u6307\u4ee4\uff09\uff0c\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u79f0\u4e3aEnclave\uff08enclave\uff09\u7684\u5b89\u5168\u533a\u57df\u3002\u8fd9\u4e9bEnclave\u5728\u7269\u7406\u5185\u5b58\u4e2d\u6709\u4e13\u95e8\u7684\u533a\u57df\uff0c\u5373\u4f7f\u5728\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u906d\u5230\u7834\u574f\uff0c\u5176\u4e2d\u7684\u6570\u636e\u548c\u4ee3\u7801\u4e5f\u80fd\u4fdd\u6301\u5b89\u5168\u3002Enclave\u5185\u7684\u4ee3\u7801\u548c\u6570\u636e\u5bf9\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u3001\u865a\u62df\u673a\u7ba1\u7406\u7a0b\u5e8f\uff08hypervisor\uff09\u548c\u751a\u81f3\u662f\u5177\u6709root\u6743\u9650\u7684\u7528\u6237\u6765\u8bf4\uff0c\u90fd\u662f\u4e0d\u53ef\u89c1\u7684\u3002\u5c3d\u7ba1SGX\u63d0\u4f9b\u4e86\u8ba1\u7b97\u65f6\u6570\u636e\u548c\u4ee3\u7801\u7684\u5b89\u5168\u6027\uff0c\u4f46Enclave\u7684\u5b9e\u73b0\u901a\u5e38\u4f7f\u7528\u5185\u5b58\u4e0d\u5b89\u5168\u548c\u7c7b\u578b\u4e0d\u5b89\u5168\u7684\u8bed\u8a00\uff08\u5982C\/C++\uff09\u7f16\u5199\uff0c\u589e\u52a0\u4e86\u5b89\u5168\u98ce\u9669\u3002\u56e0\u6b64Enclave\u5b9e\u73b0\u7684\u5b89\u5168\u6027\u5f97\u5230\u4e86\u7814\u7a76\u8005\u5e7f\u6cdb\u7684\u5173\u6ce8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u63d0\u51fa\u4e86\u4e00\u79cd\u57fa\u4e8e\u8f93\u5165\u548c\u7a0b\u5e8f\u53d8\u5f02\u7684\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\uff0c\u4e13\u4e3aIntel SGX Enclave\u5b9e\u73b0\u800c\u8bbe\u8ba1\u3002FUZZSGX\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6a21\u7cca\u6d4b\u8bd5\u8fd0\u884c\u65f6\u73af\u5883\uff0c\u5373FUZZSGX RUNTIME\uff0c\u8fd9\u662f\u4e00\u4e2a\u517c\u5bb9Intel SGX SDK\u7684\u5e93\uff0c\u5b83\u80fd\u591f\u5728Enclave\u5185\u90e8\u5b9e\u73b0\u4ee3\u7801\u8986\u76d6\u7387\u548c\u5185\u5b58\u6f0f\u6d1e\u68c0\u6d4b\u7684\u529f\u80fd\u3002\u8fdb\u4e00\u6b65\uff0c\u4e3a\u4e86\u63a2\u7d22\u5bbf\u4e3b\u5e94\u7528\u4e0eEnclave\u7684\u8fb9\u754c\u4fe1\u606f\uff0cFUZZSGX\u5bf9\u73b0\u6709\u7684\u5bbf\u4e3b\u5e94\u7528\u548cEnclave\u5b9e\u73b0\u8fdb\u884c\u9759\u6001\u5206\u6790\u548c\u7b26\u53f7\u6267\u884c\uff0c\u4ee5\u81ea\u52a8\u5316\u751f\u6210\u6d4b\u8bd5\u7a0b\u5e8f\u3002\u5728\u5b9e\u9a8c\u4e2d\uff0c\u4f5c\u8005\u572830\u4e2a\u6d41\u884c\u7684SGX\u5e94\u7528\u4e0a\u8bc4\u4f30\u4e86FUZZSGX\u7684\u6a21\u7cca\u6d4b\u8bd5\u6548\u679c\uff0c\u5e76\u5728\u8fd9\u4e9bSGX\u9879\u76ee\u4e2d\u627e\u5230\u4e8693\u4e2a\u6f0f\u6d1e\uff0c\u5305\u62ec\u6570\u636e\u7ade\u4e89\u3001\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u3001\u8d8a\u754c\u8bbf\u95ee\u7b49\u9519\u8bef\u3002\u901a\u8fc7\u9488\u5bf9\u6027\u5730\u5bf9\u5bbf\u4e3b\u5e94\u7528\u4e0eEnclave\u8fb9\u754c\u8fdb\u884c\u6d4b\u8bd5\uff0cFUZZSGX\u5b9e\u73b0\u4e863.2\u500d\u7684\u4ee3\u7801\u8986\u76d6\u7387\u63d0\u5347\uff0c\u5e76\u53d1\u73b0\u4e8648.2%\u66f4\u591a\u7684\u6f0f\u6d1e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">02<strong>\u7814\u7a76\u6311\u6218<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5bf9SGXEnclave\u5b9e\u73b0\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\u65f6\uff0c\u4e3b\u8981\u9762\u4e34\u4e24\u5927\u56f0\u96be\uff1a\u8fd0\u884c\u65f6\u73af\u5883\u53d7\u9650\uff08Runtime Challenges\uff09\u548c\u5df2\u6709\u6a21\u7cca\u6d4b\u8bd5\u65b9\u6848\u65e0\u6cd5\u9ad8\u6548\u63a2\u7d22Enclave\u5185\u90e8\u7684\u4ee3\u7801\uff08Fuzzing Challenges\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd0\u884c\u65f6\u6311\u6218\uff08Runtime Challenges\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. \u6709\u9650\u8d44\u6e90\uff08Limited Resources\uff09\uff1aSGXEnclave\u63d0\u4f9b\u7684\u8d44\u6e90\u662f\u6709\u9650\u7684\uff0c\u5927\u591a\u6570\u5b9e\u73b0\u4ec5\u63d0\u4f9b128MB\u7684EPC\uff08Enclave Page Cache\uff09\u5185\u5b58\uff0c\u8fd9\u5728\u7cfb\u7edf\u4e2d\u662f\u5168\u5c40\u5171\u4eab\u7684\u3002\u7531\u4e8e\u6a21\u7cca\u6d4b\u8bd5\u5f80\u5f80\u9700\u8981\u540c\u65f6\u8fd0\u884c\u591a\u4e2a\u76ee\u6807\u7a0b\u5e8f\u5b9e\u4f8b\uff0c\u9ad8\u541e\u5410\u91cf\u7684\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\u5f88\u5feb\u5c31\u4f1a\u8017\u5c3d\u8fd9\u4e9b\u5185\u5b58\u8d44\u6e90\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. \u4e0d\u53ef\u7528\u7684\u64cd\u4f5c\u7cfb\u7edf\u670d\u52a1\uff08Unavailable OS Services\uff09\uff1a\u5728SGXEnclave\u5185\u90e8\u65e0\u6cd5\u4f7f\u7528\u4efb\u4f55\u64cd\u4f5c\u7cfb\u7edf\u670d\u52a1\uff0c\u5982\u7cfb\u7edf\u8c03\u7528\u3002\u73b0\u6709\u7684\u6a21\u7cca\u6d4b\u8bd5\u89e3\u51b3\u65b9\u6848\uff0c\u5982AFL\uff0c\u9ad8\u5ea6\u4f9d\u8d56\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u670d\u52a1\uff0c\u56e0\u6b64\u65e0\u6cd5\u76f4\u63a5\u5e94\u7528\u4e8eSGX\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. \u65e0\u6cd5\u5bfc\u51fa\u4ee3\u7801\u8986\u76d6\u7387\uff08No Code Coverage Export\uff09\uff1a\u7531\u4e8eSGXEnclave\u5185\u5b58\u5904\u4e8e\u88ab\u4fdd\u62a4\u7684\u533a\u57df\uff0c\u73b0\u6709\u7684\u6a21\u7cca\u6d4b\u8bd5\u65b9\u6848\u65e0\u6cd5\u4eceEnclave\u5185\u90e8\u83b7\u53d6\u66f4\u65b0\u4fe1\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. \u7f3a\u5c11\u5730\u5740Sanitizer\uff08Missing Sanitizers\uff09\uff1a\u6a21\u7cca\u6d4b\u8bd5\u9ad8\u5ea6\u4f9d\u8d56\u4e8esanitizer\u6765\u53d1\u73b0\u5e38\u89c1\u7684\u5185\u5b58\u9519\u8bef\u3002\u7531\u4e8e\u6709\u9650\u8d44\u6e90\u548c\u64cd\u4f5c\u7cfb\u7edf\u670d\u52a1\u4e0d\u53ef\u7528\u7684\u9650\u5236\uff0c\u73b0\u6709\u7684sanitizer\u65e0\u6cd5\u5728Enclave\u5185\u5de5\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6a21\u7cca\u6d4b\u8bd5\u6311\u6218\uff08Fuzzing Challenges\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. \u6df1\u5c42\u4ee3\u7801\u8def\u5f84\uff08Deep Code Paths\uff09\uff1a\u8c03\u7528\u4e86Enclave\u63a5\u53e3\u7684\u4ee3\u7801\u53ef\u80fd\u9690\u85cf\u5728\u5bbf\u4e3b\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u7684\u6df1\u5c42\u8def\u5f84\u4e2d\u3002\u56e0\u6b64\uff0c\u73b0\u6709\u7684\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\u53ef\u80fd\u9700\u8981\u6570\u5c0f\u65f6\u7684\u53d8\u5f02\u624d\u80fd\u627e\u5230\u89e6\u53d1\u4e86Enclave\u63a5\u53e3\u8c03\u7528\u7684\u8f93\u5165\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. \u672a\u4f7f\u7528\u7684ECALLs\uff08Unused ECALLs\uff09\uff1a\u5c3d\u7ba1Enclave\u53ef\u4ee5\u63d0\u4f9b\u591a\u4e2aECALLs\uff0c\u4f46\u5bbf\u4e3b\u5e94\u7528\u4e2d\u53ef\u80fd\u6ca1\u6709\u4f7f\u7528\u5168\u90e8\u7684ECALLs\uff0c\u8fd9\u4f7f\u5f97\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\u65e0\u6cd5\u5bf9\u672a\u4f7f\u7528\u7684ECALLs\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. \u6709\u9650\u7684ECALL\u8f93\u5165\u548cOCALL\u8f93\u51fa\u8986\u76d6\u7387\uff08Limited ECALL Input and OCALL Output Coverage\uff09\uff1a\u53d7\u9650\u4e8eEnclave\u73af\u5883\u7684\u9650\u5236\uff0c\u5f88\u96be\u76f4\u63a5\u8fdb\u884c\u8986\u76d6\u7387\u6536\u96c6\u548c\u90e8\u7f72sanitizer\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. \u4e0d\u53ef\u7528\u7684\u5bbf\u4e3b\u5e94\u7528\uff08Unavailable Host Apps\uff09\uff1a\u5f53Enclave\u5b9e\u73b0\u88ab\u7528\u4f5c\u5b89\u5168\u5e93\u65f6\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u80fd\u6839\u672c\u4e0d\u63d0\u4f9b\u5bbf\u4e3b\u5e94\u7528\uff0c\u4ec5\u63d0\u4f9bEnclave\u4ee5\u4f5c\u4e3a\u5b89\u5168\u5e93\u4f7f\u7528\uff0c\u4f20\u7edf\u7684\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\u5728\u6ca1\u6709\u5bbf\u4e3b\u7a0b\u5e8f\u7684\u60c5\u51b5\u4e0b\u65e0\u6cd5\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">03<strong>\u7814\u7a76\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Overview: \u9488\u5bf9\u4ee5\u4e0a\u56f0\u96be\uff0c\u672c\u6587\u63d0\u51fa\u4e86\u4e00\u79cd\u9488\u5bf9\u4e8eEnclave\u5b9e\u73b0\u7684\u6a21\u7cca\u6d4b\u8bd5\u5de5\u5177\uff0c\u901a\u8fc7\u4e24\u79cd\u7b56\u7565\u6765\u63d0\u9ad8\u6a21\u7cca\u6d4b\u8bd5\u7684\u6709\u6548\u6027\uff1a\u6a21\u62df\u6267\u884c\u73af\u5883\uff08FUZZSGX RUNTIME\uff09\u548c \u81ea\u52a8\u5316\u6a21\u7cca\u6d4b\u8bd5\u7a0b\u5e8f\u751f\u6210\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. FUZZSGX RUNTIME<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u7684\uff1a\u89e3\u51b3Enclave\u6267\u884c\u73af\u5883\u8d44\u6e90\u53d7\u9650\u7684\u95ee\u9898\uff0c\u63d0\u4f9b\u6a21\u7cca\u6d4b\u8bd5\u5fc5\u8981\u7684\u8986\u76d6\u7387\u6536\u96c6\u548csanitizer\u529f\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u73b0\u65b9\u5f0f\uff1a\u4f5c\u8005\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7279\u522b\u7684\u5e93\u64cd\u4f5c\u7cfb\u7edf\uff08libOS\uff09\uff0c\u5728\u63a5\u53e3\u5c42\u9762\u548cIntel SDK\u4e92\u76f8\u517c\u5bb9\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4f5c\u8005\u5206\u522b\u5728\u5bbf\u4e3b\u7a0b\u5e8f\u548cEnclave\u5185\u5b9e\u73b0\u4e86\u4e00\u4e2aShim\u5c42\uff0c\u7528\u6765\u4f20\u9012\u5fc5\u8981\u7684\u8986\u76d6\u7387\u3001sanitizer\u53cd\u9988\u4fe1\u606f\u7ed9\u6a21\u7cca\u6d4b\u8bd5\u5668\u3002\u540c\u65f6\u8fd9\u4e2alibOS\u53ef\u4ee5\u5728\u666e\u901a\u7684\u7528\u6237\u6001\u6267\u884c\uff0c\u8fdb\u800c\u5b9e\u73b0\u4e86\u5728\u865a\u62df\u7684SGX\u73af\u5883\u4e2d\u52a0\u8f7d\u88ab\u6d4b\u7684Enclave\uff0c\u540c\u65f6\u4f5c\u8005\u8fc1\u79fb\u4e86\u73b0\u6709\u7684\u8986\u76d6\u7387\u65b9\u6848\u548csanitizer\u65b9\u6848\uff0c\u4ee5\u4fbf\u5728\u8fd0\u884c\u65f6\u63d0\u4f9b\u53cd\u9988\u548c\u68c0\u67e5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"412\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/1-1-1024x412.png\" alt=\"\" class=\"wp-image-6341\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1-1024x412.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1-300x121.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1-768x309.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1-150x60.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1-250x101.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. \u6a21\u7cca\u6d4b\u8bd5\u7a0b\u5e8f\u7684\u751f\u6210<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u7684\uff1a\u9ad8\u6548\u63a2\u7d22Enclave\u5185\u90e8\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"303\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/2-1-1024x303.png\" alt=\"\" class=\"wp-image-6342\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1-1024x303.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1-300x89.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1-768x228.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1-150x44.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1-250x74.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u73b0\u65b9\u5f0f\uff1aFUZZSGX\u4e3b\u8981\u4f9d\u8d56\u7a0b\u5e8f\u53d8\u5f02\u6765\u751f\u6210\u5bbf\u4e3b\u7a0b\u5e8f\u4ee3\u7801\u5b9e\u73b0\u5bf9Enclave\u7684\u6d4b\u8bd5\u3002\u5728\u5206\u6790\u9636\u6bb5\uff0cFUZZSGX\u4e3b\u8981\u63d0\u53d6\u4e86\u63a5\u53e3\u3001\u4f9d\u8d56\u4fe1\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25a0Enclave\u63a5\u53e3\u8bc6\u522b\uff1aFUZZSGX\u89e3\u6790\u4e86SGX\u4e2d\u7684\u63a5\u53e3\u5b9a\u4e49EDL\u6587\u4ef6\uff0c\u63d0\u53d6ECALL\/OCALL\u51fd\u6570\u548c\u63a5\u53e3\u7684\u76f8\u5173\u4fe1\u606f\uff0c\u4ee5\u89e3\u51b3\u672a\u4f7f\u7528ECALLs\u7684\u6311\u6218\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25a0\u7a0b\u5e8f\u4f9d\u8d56\u6027\u63a8\u65ad\uff1aFUZZSGX\u5229\u7528\u9759\u6001\u5206\u6790\u548c\u7b26\u53f7\u6267\u884c\u5206\u6790ECALLs\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u3002\u5728\u6709\u5bbf\u4e3b\u5e94\u7528\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u5206\u6790\u5bbf\u4e3b\u5e94\u7528\u4e2dECALL\u7684\u8c03\u7528\u6765\u63a8\u65ad\u5176\u4f9d\u8d56\u5173\u7cfb\u3002\u5728\u6ca1\u6709\u5bbf\u4e3b\u5e94\u7528\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u901a\u8fc7\u5bf9Enclave\u4e2d\u5168\u5c40\u53d8\u91cf\u7b49\u72b6\u6001\u7684\u8ddf\u8e2a\uff0c\u5206\u6790ECALL\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25a0\u521d\u59cb\u79cd\u5b50\u751f\u6210\uff1aFUZZSGX\u5229\u7528\u7b26\u53f7\u6267\u884c\u5e2e\u52a9\u751f\u6210\u6a21\u7cca\u6d4b\u8bd5\u6240\u9700\u7684\u521d\u59cb\u79cd\u5b50\uff0c\u4ee5\u63d0\u9ad8\u6d4b\u8bd5\u7684\u6548\u7387\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u83b7\u53d6\u5230\u4f9d\u8d56\u4fe1\u606f\u540e\uff0cSGXFUZZ\u4f1a\u81ea\u52a8\u5316\u751f\u6210\u4e00\u7cfb\u5217\u7684\u5bbf\u4e3b\u7a0b\u5e8f\uff0c\u5728\u7f16\u8bd1\u6267\u884c\u540e\u5373\u53ef\u5b9e\u73b0\u5bf9Enclave\u7684\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">04<strong>\u5b9e\u9a8c\u7ed3\u679c<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f5c\u8005\u9009\u53d6\u4e8630\u4e2aEnclave\u5b9e\u73b0\u4f5c\u4e3a\u5b9e\u9a8c\u76ee\u6807\uff0c\u57288\u4e2aEnclaves\u4e2d\u53d1\u73b0\u4e86\u603b\u8ba180\u4e2abug\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"507\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/3-1-1024x507.png\" alt=\"\" class=\"wp-image-6343\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1-1024x507.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1-300x149.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1-768x380.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1-150x74.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1-250x124.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;1. \u5bf9\u6bd4\u5b9e\u9a8c\uff1a\u5728\u5bf9\u6bd4\u5b9e\u9a8c\u90e8\u5206\uff0c\u4f5c\u8005\u548c\u5df2\u6709\u65b9\u6848\u5728\u541e\u5410\u91cf\u3001\u4ee3\u7801\u8986\u76d6\u7387\u3001\u6f0f\u6d1e\u6570\u91cf\u4e0a\u8fdb\u884c\u4e86\u5bf9\u6bd4\u3002\u5b9e\u9a8c\u9009\u53d6\u4e86SGXFuzz\u505a\u4e3a\u5bf9\u6bd4\uff0c\u540c\u65f6\u8fd8\u4f7f\u7528AFL\u76f4\u63a5\u5bf9\u5bbf\u4e3b\u7a0b\u5e8f\u8fdb\u884c\u6a21\u7cca\u6d4b\u8bd5\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u541e\u5410\u91cf\u5b9e\u9a8c\uff1a\u5b9e\u9a8c\u7ed3\u679c\u8868\u660e\u8be5\u65b9\u6848\u7684\u541e\u5410\u91cf\u548cAFL\u63a5\u8fd1\uff0c\u5e76\u5927\u5e45\u5ea6\u9886\u5148\u4e8eSGXFuzz\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"351\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/4-1-1024x351.png\" alt=\"\" class=\"wp-image-6344\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1-1024x351.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1-300x103.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1-768x263.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1-150x51.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1-250x86.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8986\u76d6\u7387\u5b9e\u9a8c\uff1a\u9009\u53d6\u4e86\u8bc4\u4f30\u6570\u636e\u96c6\u4e2d\u768410\u9879\u76ee\uff0c\u8fdb\u884c\u4e8624\u5c0f\u65f6\u7684\u5b9e\u9a8c\uff0c\u5e76\u6536\u96c6\u4e86\u4ee3\u7801\u8986\u76d6\u7387\u3002\u6839\u636e\u5b9e\u9a8c\u7ed3\u679c\uff0cAFL\u5728\u6240\u6709\u76ee\u6807\u4e2d\u4ea7\u751f\u7684\u4ee3\u7801\u8986\u76d6\u7387\u90fd\u8f83\u4f4e\uff0c\u56e0\u4e3a\u5b83\u65e0\u6cd5\u4eceEnclave\u5185\u90e8\u63d0\u53d6\u4ee3\u7801\u8986\u76d6\u7387\u3002FUZZSGX\u5728\u9664\u4e86sgx-gmpdemo\u9879\u76ee\u4ee5\u5916\u7684\u6240\u6709\u9879\u76ee\u4e2d\u90fd\u63a2\u7d22\u4e86\u66f4\u591a\u7684\u4ee3\u7801\u3002\u4f5c\u8005\u6307\u51fa\uff0cSGXFuzz\u5728sgx-gmp-demo\u9879\u76ee\u4e2d\u8986\u76d6\u4e86\u66f4\u591a\u7684\u4ee3\u7801\uff0c\u53ef\u80fd\u662f\u7531\u4e8e\u8be5\u9879\u76ee\u6709\u5927\u91cf\u7b80\u5355\u5b9e\u73b0\u7684ECALL\u3002\u603b\u4f53\u800c\u8a00\uff0c\u5f97\u76ca\u4e8eFUZZSGX RUNTIME\u7684\u9ad8\u541e\u5410\u91cf\uff0cFUZZSGX\u5728\u8bc4\u4f30\u4e2d\u5b9e\u73b0\u4e86\u6bd4SGXFuzz\u9ad83.2\u500d\u7684\u8986\u76d6\u7387\uff0c\u6bd4AFL\u9ad823\u500d\u7684\u4ee3\u7801\u8986\u76d6\u7387\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"703\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/10-1-1024x703.png\" alt=\"\" class=\"wp-image-6347\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1-1024x703.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1-300x206.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1-768x527.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1-150x103.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1-219x150.png 219w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/10-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6f0f\u6d1e\u6570\u91cf\uff1a\u4e0e\u4ee3\u7801\u8986\u76d6\u7387\u7c7b\u4f3c\uff0cAFL\u5728\u5927\u591a\u6570\u9879\u76ee\u4e2d\u53d1\u73b0\u7684\u5d29\u6e83\u6570\u91cf\u6700\u5c11\u3002\u9664sgx-mpi\u9879\u76ee\u5916\uff0cFUZZSGX\u5728\u6240\u6709\u5176\u4ed6\u9879\u76ee\u4e2d\u53d1\u73b0\u7684\u5d29\u6e83\u6570\u91cf\u5747\u591a\u4e8eSGXFuzz\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"614\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/5-1-1024x614.png\" alt=\"\" class=\"wp-image-6348\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1-1024x614.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1-300x180.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1-768x461.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1-150x90.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1-250x150.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;2. \u6d88\u878d\u5b9e\u9a8c\uff1a\u4f5c\u8005\u9009\u62e9\u4e866\u4e2a\u9879\u76ee\u8fdb\u884c\u4e86\u6d88\u878d\u5b9e\u9a8c\uff0c\u4ece\u4ee3\u7801\u8986\u76d6\u7387\u3001\u6f0f\u6d1e\u6570\u91cf\u4e24\u4e2a\u7ef4\u5ea6\u8fdb\u884c\u4e86\u6bd4\u8f83\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8986\u76d6\u7387\u5b9e\u9a8c\uff1a\u5728\u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u7531\u5f00\u53d1\u8005\u7f16\u5199\u7684\u5e94\u7528\u7a0b\u5e8f\u4ea7\u751f\u4e86\u66f4\u9ad8\u7684\u4ee3\u7801\u8986\u76d6\u7387\u3002\u8fd9\u662f\u56e0\u4e3a\u5f00\u53d1\u8005\u901a\u5e38\u4e86\u89e3\u4e0d\u540cECALL\u4e4b\u95f4\u7684\u5b9e\u9645\u4f9d\u8d56\u5173\u7cfb\u3002\u5bf9\u4e8e\u4e00\u4e9b\u9879\u76ee\uff0c\u5982mbedtls\uff0cFUZZSGX\u751f\u6210\u7684\u5bbf\u4e3b\u7a0b\u5e8f\u4ea7\u751f\u4e86\u66f4\u9ad8\u7684\u4ee3\u7801\u8986\u76d6\u7387\u3002\u8fd9\u53ef\u80fd\u662f\u56e0\u4e3a\u539f\u672c\u7684\u5bbf\u4e3b\u5e94\u7528\u5e76\u6ca1\u6709\u5145\u5206\u4f7f\u7528Enclave\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"585\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/7-1-1024x585.png\" alt=\"\" class=\"wp-image-6350\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1-1024x585.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1-300x171.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1-768x439.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1-150x86.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1-250x143.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-1.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00a0\u6f0f\u6d1e\u6570\u91cf\u5b9e\u9a8c\uff1a\u5bf9\u4e8e\u6bcf\u4e2a\u9879\u76ee\uff0c\u5f00\u542f\u7a0b\u5e8f\u53d8\u5f02\u7684\u914d\u7f6e\u90fd\u627e\u5230\u4e86\u66f4\u591a\u7684\u5d29\u6e83\u3002\u4f5c\u8005\u5728\u7814\u7a76\u540e\u53d1\u73b0\uff0c\u4e00\u4e9b\u5bf9\u7528\u6237\u8f93\u5165\u68c0\u67e5\u7684\u903b\u8f91\u88ab\u653e\u5728\u4e86\u5bbf\u4e3b\u5e94\u7528\u4e2d\uff0c\u800c\u4e0d\u662fEnclave\u4e2d\u3002\u7531\u4e8eSGX\u5a01\u80c1\u6a21\u578b\u6307\u51fa\uff0c\u6240\u6709\u53c2\u6570\u5fc5\u987b\u7531Enclave\u8fdb\u884c\u68c0\u67e5\uff0c\u8fd9\u79cd\u9519\u8bef\u7684\u4fe1\u4efb\u4f7f\u5f97FUZZSGX\u76f4\u63a5\u5bf9ECALL\u63a5\u53e3\u8fdb\u884c\u6d4b\u8bd5\uff0c\u5373\u53ef\u4ea7\u751f\u5927\u91cf\u5d29\u6e83\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"594\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/8-1024x594.png\" alt=\"\" class=\"wp-image-6351\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8-1024x594.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8-300x174.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8-768x445.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8-150x87.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8-250x145.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/8.png 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">05<strong>\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u9488\u5bf9SGX Enclave\u6d4b\u8bd5\uff0c\u63d0\u51fa\u4e86\u4e00\u79cd\u57fa\u4e8e\u7a0b\u5e8f\u53d8\u5f02\u548c\u865a\u62df\u6267\u884c\u73af\u5883\u7684\u6a21\u7cca\u6d4b\u8bd5\u65b9\u6848\u3002\u5e76\u8fdb\u4e00\u6b65\u5b9e\u73b0\u4e86\u57fa\u4e8elibOS\u7684FUZZSGX 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<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-6340","post","type-post","status-publish","format-standard","hentry","category-research"],"_links":{"self":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/6340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6340"}],"version-history":[{"count":1,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/6340\/revisions"}],"predecessor-version":[{"id":6352,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/6340\/revisions\/6352"}],"wp:attachment":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6340"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}