{"id":6331,"date":"2023-11-15T17:45:05","date_gmt":"2023-11-15T09:00:05","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=6331"},"modified":"2023-11-15T17:45:05","modified_gmt":"2023-11-15T09:00:05","slug":"%e3%80%90%e8%ae%ba%e6%96%87%e5%88%86%e4%ba%ab%e3%80%91vd-guard-dma-guided-fuzzing-for-hypervisor-virtual-device","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=6331","title":{"rendered":"\u3010\u8bba\u6587\u5206\u4eab\u3011VD-Guard: DMA Guided Fuzzing for Hypervisor Virtual Device"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u672c\u6b21\u4ecb\u7ecd\u7684\u8bba\u6587\u4f7f\u7528\u9759\u6001\u5206\u6790\u4e0e\u6a21\u7cca\u6d4b\u8bd5\u76f8\u7ed3\u5408\u7684\u65b9\u6cd5\uff0c\u9488\u5bf9\u865a\u62df\u673a\u76d1\u89c6\u5668\uff08Hypervisor\uff09\u4e2d\u865a\u62df\u8bbe\u5907DMA\u76f8\u5173\u7684\u6f0f\u6d1e\u8fdb\u884c\u6316\u6398\u3002\u8bba\u6587\u53d1\u8868\u4e8e\u8f6f\u4ef6\u5de5\u7a0b\u9876\u7ea7\u4f1a\u8baeASE 2023\uff0c\u4f5c\u8005\u56e2\u961f\u6765\u81ea\u4e8e\u4e2d\u56fd\u79d1\u5b66\u9662\u8f6f\u4ef6\u7814\u7a76\u6240\u548c\u4e0a\u6d77\u4ea4\u901a\u5927\u5b66\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001<\/strong><strong>\u7814\u7a76\u80cc\u666f<\/strong><strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u968f\u7740\u4e91\u8ba1\u7b97\u6280\u672f\u7684\u4e0d\u65ad\u666e\u53ca\uff0c\u8bb8\u591a\u4e91\u5382\u5546\u90fd\u53d1\u5e03\u4e86\u81ea\u5df1\u7684\u4e91\u670d\u52a1\uff0c\u6bd4\u5982\u8c37\u6b4c\u4e91\uff0c\u963f\u91cc\u4e91\uff0c\u534e\u4e3a\u4e91\u7b49\u3002\u865a\u62df\u5316\u6280\u672f\u662f\u4e91\u8ba1\u7b97\u7684\u6838\u5fc3\uff0c\u5176\u53ef\u4ee5\u5c06\u7269\u7406\u8d44\u6e90\u5212\u5206\u6210\u865a\u62df\u8d44\u6e90\u7ed9\u4e0d\u540c\u7684\u7528\u6237\u4f7f\u7528\u3002\u865a\u62df\u673a\u76d1\u89c6\u5668\uff08Hypervisor\uff09\u662f\u865a\u62df\u5316\u6280\u672f\u7684\u6838\u5fc3\u7cfb\u7edf\u8f6f\u4ef6\uff0c\u5b83\u53ef\u4ee5\u7ba1\u7406\u865a\u62df\u673a\u7684\u8d44\u6e90\u3002\u73b0\u5982\u4eca\u8bb8\u591a\u7814\u7a76\u90fd\u9488\u5bf9Hypervisor\u4e2d\u7684\u865a\u62df\u8bbe\u5907\u8fdb\u884c\u6f0f\u6d1e\u6316\u6398\uff0c\u5e38\u89c1\u7684\u865a\u62df\u8bbe\u5907\u6709\u865a\u62df\u7f51\u5361\u3001\u865a\u62df\u58f0\u5361\u3001\u865a\u62dfUSB\u8bbe\u5907\u7b49\uff0c\u865a\u62df\u8bbe\u5907\u7531\u4e8e\u79cd\u7c7b\u7e41\u591a\uff0c\u4e14\u4ee3\u7801\u590d\u6742\uff0c\u662fHypervisor\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u653b\u51fb\u9762\u3002\u5728\u9488\u5bf9\u865a\u62df\u8bbe\u5907\u7684\u6f0f\u6d1e\u6316\u6398\u4e2d\uff0c\u4e00\u4e2a\u5e38\u89c1\u7684\u653b\u51fb\u6a21\u578b\u5c31\u662f\u5047\u8bbe\u5ba2\u6237\u673a\u662f\u6076\u610f\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7PIO\/MMIO\/DMA\u7b49\u6570\u636e\u4fe1\u9053\u5411\u865a\u62df\u8bbe\u5907\u53d1\u9001\u6076\u610f\u7684\u6307\u4ee4\uff0c\u4ece\u800c\u5bf9\u865a\u62df\u8bbe\u5907\u751a\u81f3Hypervisor\u8fdb\u884c\u653b\u51fb\u3002\u800c\u6a21\u7cca\u6d4b\u8bd5\uff08Fuzzing\uff09\u662f\u8fd1\u4e9b\u5e74\u6316\u6398\u6f0f\u6d1e\u6700\u6709\u6548\u7684\u65b9\u5f0f\u4e4b\u4e00\uff0c\u5b83\u4e3b\u8981\u5411\u88ab\u6d4b\u7a0b\u5e8f\u63d0\u4f9b\u968f\u673a\u7684\u8f93\u5165\u5e76\u4e14\u76d1\u63a7\u88ab\u6d4b\u7a0b\u5e8f\u7684\u72b6\u6001\uff0c\u5e76\u53d1\u73b0\u53ef\u80fd\u7684\u5d29\u6e83\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u4e5f\u91c7\u7528\u4e86Fuzzing\u7684\u6280\u672f\u9488\u5bf9\u865a\u62df\u8bbe\u5907\u8fdb\u884c\u6f0f\u6d1e\u6316\u6398\uff0c\u4f46\u662f\u672c\u6587\u7684\u4e3b\u8981\u76ee\u6807\u662fDMA\u76f8\u5173\u7684\u6f0f\u6d1e\u3002\u6839\u636e\u4f5c\u8005\u7684\u7edf\u8ba1\uff0c\u670982%\u865a\u62df\u8bbe\u5907\u7684\u6f0f\u6d1e\u4e0eDMA\u64cd\u4f5c\u6709\u5173\uff0c\u6240\u4ee5\u9488\u5bf9DMA\u76f8\u5173\u7684\u6f0f\u6d1e\u8fdb\u884c\u6316\u6398\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u5b89\u5168\u9700\u6c42\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001<\/strong><strong>\u7814\u7a76\u65b9\u6cd5<\/strong><strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Overview<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9488\u5bf9\u4e0a\u8ff0\u95ee\u9898\uff0c\u4f5c\u8005\u5f00\u53d1\u4e86VD-GUARD\u5de5\u5177\uff0c\u5176\u67b6\u6784\u5982\u4e0a\u56fe1\u6240\u793a\uff0c\u4e3b\u8981\u5305\u542b\u4e24\u4e2a\u90e8\u5206\uff0c\u5206\u522b\u662f\u9759\u6001\u5206\u6790\u548cFuzzing\u3002\u9759\u6001\u5206\u6790\u90e8\u5206\u4e3b\u8981\u6709\u4e24\u4e2a\u529f\u80fd\uff0c\u5206\u522b\u662f\u5bfb\u627e\u80fd\u591f\u89e6\u53d1DMA\u64cd\u4f5c\u7684\u8def\u5f84\uff0c\u4f5c\u8005\u5c06\u8fd9\u4e00\u6b65\u9aa4\u79f0\u4f5cCall Chain Searching\uff1b\u4ee5\u53ca\u6784\u5efa\u521d\u59cb\u79cd\u5b50\u3002Fuzzing\u90e8\u5206\u4f5c\u8005\u4f7f\u7528\u4e86\u9759\u6001\u5206\u6790\u7684\u7ed3\u679c\u8fdb\u884cDMA Guided Fuzzing\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"150\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/1-1024x150.png\" alt=\"\" class=\"wp-image-6332\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-1024x150.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-300x44.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-768x112.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-150x22.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1-250x37.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/1.png 1584w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe1\u00a0VD-GUARD\u5de5\u5177\u67b6\u6784\u56fe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Call Chain Searching<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ecf\u8fc7\u5206\u6790\uff0cVD-GUARD\u53d1\u73b0\u53ea\u6709\u5f53\u5185\u5b58\u533a\u57df\u88ab\u8bbe\u7f6e\u4e3aMMIO\/PIO\u533a\u57df\uff0c\u5e76\u4e14\u5b58\u5728\u4e00\u4e2a\u7531\u5185\u5b58\u64cd\u4f5c\u5230\u6700\u7ec8\u6267\u884cDMA\u64cd\u4f5c\u7684\u8c03\u7528\u94fe\u65f6\uff0c\u5185\u5b58\u64cd\u4f5c\u624d\u53ef\u80fd\u89e6\u53d1\u4e0eDMA\u76f8\u5173\u7684\u6f0f\u6d1e\u3002\u6240\u4ee5VD-GUARD\u9996\u5148\u901a\u8fc7\u8bc6\u522b\u5185\u5b58\u7684\u521d\u59cb\u5316\u548c\u6ce8\u518c\u8fc7\u7a0b\u6765\u63d0\u53d6\u53ef\u80fd\u5b58\u5728bug\u7684\u5185\u5b58\u64cd\u4f5c\u3002\u63a5\u4e0b\u6765\uff0cVD-GUARD\u6784\u5efa\u8c03\u7528\u56fe\uff0c\u5e76\u4f7f\u7528\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\u641c\u7d22\u4eceMMIO\/PIO\u51fd\u6570\u5230DMA\u64cd\u4f5c\u7684\u8c03\u7528\u94fe\u3002\u5728\u6784\u5efa\u8c03\u7528\u56fe\u65f6\uff0cVD-GUARD\u7279\u522b\u5173\u6ce8\u4e86\u51fd\u6570\u6307\u9488\u7684\u8d4b\u503c\u8bed\u53e5\uff0c\u786e\u4fdd\u8c03\u7528\u94fe\u7684\u5b8c\u6574\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Initial Seed Construction<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u4e86\u8c03\u7528\u94fe\u4e4b\u540e\uff0cVD-GUARD\u76ee\u7684\u662f\u6784\u5efa\u4e00\u4e2a\u521d\u59cb\u79cd\u5b50\uff0c\u8be5\u79cd\u5b50\u80fd\u591f\u89e6\u53d1\u865a\u62df\u8bbe\u5907\u4e2d\u8bc6\u522b\u51fa\u6765\u7684\u8c03\u7528\u94fe\u3002\u4ed6\u4eec\u5bf9\u6bcf\u4e2a\u8c03\u7528\u94fe\u6784\u5efa\u4e86\u4e00\u4e2a\u7a0b\u5e8f\u4f9d\u8d56\u56fe\uff08PDG\uff09\uff0c\u5982\u56fe2\u6240\u793a\uff0cPDG\u7684\u8282\u70b9\u662f\u8c03\u7528\u94fe\u51fd\u6570\u4e2d\u7684\u8bed\u53e5\uff0c\u8fb9\u662f\u63a7\u5236\u6d41\u548c\u6570\u636e\u6d41\u4f9d\u8d56\u5173\u7cfb\u3002\u57fa\u4e8ePDG\uff0cVD-GUARD\u63d0\u53d6\u4e86\u63a7\u5236\u6d41\u4f9d\u8d56\u4e2d\u7684\u7ea6\u675f\u96c6\uff0c\u8fd9\u4e9b\u7ea6\u675f\u5206\u4e3a\u4e24\u7ec4\uff1a\u5fc5\u987b\u6ee1\u8db3\u7684\u7ea6\u675f\uff08\u4f8b\u5982\u5bf9\u8c03\u7528\u8bed\u53e5\u7684\u7ea6\u675f\uff09\u548c\u5fc5\u987b\u7ed5\u8fc7\u7684\u7ea6\u675f\uff08\u4f8b\u5982\u8fc7\u65e9\u89e6\u53d1\u63a7\u5236\u6d41\u8df3\u8f6c\u7684\u8bed\u53e5\u7684\u7ea6\u675f\uff09\u3002\u63a5\u7740\uff0cVD-GUARD\u6839\u636e\u6570\u636e\u4f9d\u8d56\u5173\u7cfb\u8ffd\u8e2a\u8fd9\u4e9b\u7ea6\u675f\u4e2d\u53d8\u91cf\u7684\u6570\u636e\u8d4b\u503c\u8bed\u53e5\u3002\u5982\u679c\u8ffd\u8e2a\u5230\u7684\u6570\u636e\u8d4b\u503c\u8bed\u53e5\u4e5f\u9700\u8981\u6ee1\u8db3\u5176\u4ed6\u7ea6\u675f\uff0c\u5219\u91cd\u590d\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u76f4\u5230\u4e0d\u80fd\u53d1\u73b0\u65b0\u7684\u7ea6\u675f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"641\" height=\"660\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/2.png\" alt=\"\" class=\"wp-image-6333\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2.png 641w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-291x300.png 291w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/2-146x150.png 146w\" sizes=\"auto, (max-width: 641px) 100vw, 641px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe2&nbsp;\u7b80\u5316\u7684\u7a0b\u5e8f\u4f9d\u8d56\u56fe\uff08PDG\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\uff0c\u4f7f\u7528\u4e0a\u8ff0\u7684\u9759\u6001\u5206\u6790\u65b9\u6cd5\u5728\u5904\u7406\u7ea6\u675f\u65b9\u9762\u5b58\u5728\u5c40\u9650\u6027\uff0c\u96be\u4ee5\u6784\u5efa\u89e6\u53d1\u8c03\u7528\u94fe\u7684\u79cd\u5b50\u3002\u56e0\u6b64\uff0cVD-GUARD\u5229\u7528Fuzzing\u6765\u751f\u6210\u6240\u9700\u7684\u79cd\u5b50\u3002\u5177\u4f53\u6765\u8bf4\uff0cVD-GUARD\u5728Fuzzing\u4e4b\u524d\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u6784\u5efa\u7684\u79cd\u5b50\u4f5c\u4e3a\u521d\u59cb\u79cd\u5b50\uff0c\u7136\u800cFuzzing \u7684\u76ee\u6807\u4e0d\u662f\u89e6\u53d1\u7a0b\u5e8f\u5d29\u6e83\uff0c\u800c\u662f\u6301\u7eed\u8fdb\u884cFuzzing\u76f4\u5230\u89e6\u53d1\u8c03\u7528\u94fe\u4e3a\u6b62\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. DMA Guided Fuzzing<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728Fuzzing\u90e8\u5206\uff0c\u4f5c\u8005\u9488\u5bf9DMA\u64cd\u4f5c\u76f8\u5173\u7684\u6f0f\u6d1e\u8fdb\u884c\u6316\u6398\uff0c\u63d0\u51fa\u4e86DMA Guided Fuzzing\u6280\u672f\uff0c\u4e3b\u8981\u5305\u62ec\u4e86\u4e24\u4e2a\u6539\u8fdb\u65b9\u6848\uff1aDMA Guided Metric\u4ee5\u53caDMA Guided Mutator\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DMA Guided Metric\u57fa\u4e8eDMA\u64cd\u4f5c\u6765\u8fc7\u6ee4\u79cd\u5b50\u3002DMA Guided Metric\u5728\u7f16\u8bd1\u671f\u95f4\u5728\u6bcf\u4e2aDMA\u64cd\u4f5c\u524d\u6dfb\u52a0\u6807\u8bb0\uff0c\u5e76\u5728\u7a0b\u5e8f\u6267\u884c\u65b0\u751f\u6210\u7684\u8f93\u5165\u65f6\u8bb0\u5f55DMA\u64cd\u4f5c\u7684\u8986\u76d6\u7387\u3002\u53ea\u6709\u5f53\u4e00\u4e2a\u8f93\u5165\u81f3\u5c11\u89e6\u53d1\u4e00\u4e2aDMA\u64cd\u4f5c\u5e76\u53d1\u73b0\u65b0\u7684\u8fb9\u8986\u76d6\u65f6\uff0cVD-GUARD\u624d\u4f1a\u5c06\u5176\u6dfb\u52a0\u5230\u5f53\u524d\u5faa\u73af\u7684\u79cd\u5b50\u961f\u5217\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DMA Guided Mutator\u662f\u65b0\u7684\u53d8\u5f02\u7b56\u7565\u3002\u4e3a\u4e86\u63d0\u9ad8\u6d4b\u8bd5\u7528\u4f8b\u53d8\u5f02\u7684\u6709\u6548\u6027\uff0cVD-GUARD\u9996\u5148\u5c06\u6d4b\u8bd5\u7528\u4f8b\u5206\u5272\u6210\u64cd\u4f5c\u5e8f\u5217\uff0c\u7136\u540e\u6839\u636e\u7279\u5b9a\u7b56\u7565\u8fdb\u884c\u53d8\u5f02\u3002\u5bf9\u4e8e\u5e8f\u5217\u4e2d\u7684\u6bcf\u4e2a\u5185\u5b58\u64cd\u4f5c\uff0c\u53d8\u5f02\u5668\u4ee5\u4e00\u5b9a\u7684\u6982\u7387\u03b3\u5220\u9664\u5b83\uff0c\u6216\u8005\u4ee5\u8f83\u4f4e\u7684\u6982\u7387\u03b4\u5bf9\u5176\u8fdb\u884c\u53d8\u5f02\u3002\u6b64\u5916\uff0c\u53d8\u5f02\u5668\u8fd8\u968f\u673a\u751f\u6210\u65b0\u7684\u5185\u5b58\u64cd\u4f5c\u5e8f\u5217\u3002\u901a\u8fc7\u57fa\u4e8e\u8f93\u5165\u7684\u53d8\u5f02\u7b56\u7565\u751f\u6210\u7684\u6d4b\u8bd5\u7528\u4f8b\u8d1f\u8d23\u89e6\u53d1DMA\u64cd\u4f5c\u5e76\u4fdd\u7559\u4e4b\u524d\u6269\u5c55\u7684\u72b6\u6001\uff0c\u800c\u901a\u8fc7\u968f\u673a\u751f\u6210\u7b56\u7565\u751f\u6210\u7684\u8bed\u6599\u53ef\u4ee5\u6269\u5c55\u989d\u5916\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e09\u3001<\/strong><strong>\u5b9e\u9a8c\u7ed3\u679c<\/strong><strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5b9e\u9a8c\u8bbe\u7f6e<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f5c\u8005\u6536\u96c6\u4e86\u8fd1\u4e24\u5e74\u6765QEMU\u4e2d\u4e0eDMA\u76f8\u5173\u768410\u4e2a\u6f0f\u6d1e\u4f5c\u4e3abenchmark\uff0c\u5728\u5b9e\u9a8c\u4e2d\u4f7f\u7528\u4e86QEMU 8.0\u7248\u672c\u4ee5\u53caVirtualBox 7.0.2\u7248\u672c\uff0c\u9488\u5bf9\u6bcf\u4e2a\u865a\u62df\u8bbe\u5907\u90fd\u6d4b\u8bd524\u5c0f\u65f6\u5e76\u91cd\u590d5\u6b21\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>RQ1\uff1a\u5728QEMU\u4e0a\u8fdb\u884c\u9759\u6001\u5206\u6790<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u88681\u6bd4\u8f83\u4e86<a>VD-GUARD\u548c\u4e4b\u524d\u7684\u5de5\u4f5c\u5728\u9759\u6001\u5206\u6790QEMU<\/a>\u4e2d\u53ef\u80fd\u5b58\u5728\u6f0f\u6d1e\u7684\u8c03\u7528\u94fe\u7684\u60c5\u51b5\u3002VD-GUARD\u8bc6\u522b\u7684\u6570\u636e\u5165\u53e3\u70b9\uff08146\u4e2a\uff09\u660e\u663e\u591a\u4e8e\u4e4b\u524d\u7684\u5de5\u4f5c\uff0825\u4e2a\uff09\uff0c\u8fd9\u662f\u7531\u4e8e\u5176\u4f7f\u7528\u4e86\u66f4\u5168\u9762\u7684\u5206\u6790\u65b9\u6cd5\uff0cVD-GUARD\u4e0d\u4ec5\u8003\u8651\u4e86\u5185\u5b58\u64cd\u4f5c\u7684\u540d\u79f0\uff0c\u8fd8\u8003\u8651\u4e86\u5185\u5b58\u533a\u57df\u7684\u521d\u59cb\u5316\u548c\u6ce8\u518c\u8fc7\u7a0b\u3002\u56e0\u6b64\uff0cVD-GUARD\u53d1\u73b0\u4e86\u66f4\u591a\u7684\u8c03\u7528\u94fe\uff0c\u5e76\u6db5\u76d6\u4e86\u66f4\u591a\u7684\u865a\u62df\u8bbe\u5907\u3002\u603b\u7684\u6765\u8bf4\uff0cVD-GUARD\u7684\u65b9\u6cd5\u5728\u9759\u6001\u5206\u6790\u65b9\u9762\u66f4\u4e3a\u6709\u6548\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u88681&nbsp;VD-GUARD\u548c\u4e4b\u524d\u7684\u5de5\u4f5c\u7684\u5bf9\u6bd4<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"417\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/3-1024x417.png\" alt=\"\" class=\"wp-image-6334\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-1024x417.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-300x122.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-768x313.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-150x61.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3-250x102.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/3.png 1322w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>RQ2\uff1a\u53d1\u73b00-day\u6f0f\u6d1e<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u88682\u6240\u793a\uff0cVD-GUARD\u5728\u6d4b\u8bd5\u4e2d\u6210\u529f\u53d1\u73b0\u4e864\u4e2a\u4e4b\u524d\u672a\u77e5\u7684\u865a\u62df\u8bbe\u5907\u6f0f\u6d1e\u3002\u8fd9\u4e9b\u6f0f\u6d1e\u5305\u62ec\u4e0d\u540c\u7c7b\u578b\u7684\u5185\u5b58\u9519\u8bef\uff0c\u53ef\u80fd\u5bfc\u81f4\u670d\u52a1\u62d2\u7edd\uff08DoS\uff09\u653b\u51fb\u3002\u5176\u4e2d\u4e09\u4e2a\u7531\u4e8e\u5b89\u5168\u5f71\u54cd\u4e25\u91cd\u88ab\u5206\u914d\u4e86CVE\u7f16\u53f7\uff0c\u7279\u522b\u662f\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u53ef\u80fd\u8fd8\u80fd\u88ab\u7528\u4e8e\u865a\u62df\u673a\u9003\u9038\u653b\u51fb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u88682 VD-GUARD\u53d1\u73b0\u7684\u6f0f\u6d1e<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"438\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/4-1024x438.png\" alt=\"\" class=\"wp-image-6335\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1024x438.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-300x128.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-768x328.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-150x64.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-1050x450.png 1050w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4-250x107.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/4.png 1324w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>RQ3\uff1a\u4e0eMORPHUZZ\u6bd4\u8f83<\/strong><strong><\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff081\uff09<\/strong><strong>\u6f0f\u6d1e\u53d1\u73b0<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u88683\u6240\u793a\uff0c\u5728\u6f0f\u6d1e\u6316\u6398\u7684\u5b9e\u9a8c\u4e2d\uff0cVD-GUARD \u572824\u5c0f\u65f6\u5185\u6210\u529f\u53d1\u73b0\u4e86\u6570\u636e\u96c6\u4e2d\u7684\u5168\u90e810\u4e2a\u6f0f\u6d1e\uff0c\u800cMORPHUZZ\u53ea\u627e\u5230\u4e863\u4e2a\u3002\u53e6\u5916\uff0c\u5c3d\u7ba1MORPHUZZ\u5728OSS-Fuzz\u9879\u76ee\u4e2d\u62a5\u544a\u4e86E1000E\u3001PCNET\u3001EHCI\u548cXHCI\u8bbe\u5907\u7684\u6f0f\u6d1e\uff0c\u4f46\u5728\u6b64\u6b21\u5b9e\u9a8c\u4e2d24\u5c0f\u65f6\u5185\u5e76\u672a\u53d1\u73b0\u8fd9\u4e9b\u6f0f\u6d1e\uff0c\u5b9e\u9a8c\u7ed3\u679c\u7684\u5dee\u5f02\u53ef\u80fd\u4e0eFuzzing\u7684\u8bbe\u7f6e\u6709\u5173\u3002\u8fd9\u8868\u660eVD-GUARD\u80fd\u663e\u8457\u63d0\u9ad8\u865a\u62df\u8bbe\u5907\u6f0f\u6d1e\u53d1\u73b0\u7684\u6548\u7387\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u88683&nbsp;\u4e3aQEMU\u6784\u5efa\u7684\u6f0f\u6d1e\u6570\u636e\u96c6<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"770\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/5-1024x770.png\" alt=\"\" class=\"wp-image-6336\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-1024x770.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-300x226.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-768x577.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-150x113.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5-200x150.png 200w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/5.png 1338w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff082\uff09<\/strong><strong>DMA\u8def\u5f84\u8986\u76d6\u7387<\/strong><strong><\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">DMA\u8def\u5f84\u8986\u76d6\u5bf9\u4e8eHypervisor\u7684Fuzzing\u5341\u5206\u91cd\u8981\uff0c\u8fd9\u4e2a\u5b9e\u9a8c\u6bd4\u8f83\u4e86MORPHUZZ\u548cVD-GUARD\u57286\u4e2a\u865a\u62df\u8bbe\u5907\u4e0a\u7684\u8868\u73b0\u3002\u56fe3\u8bf4\u660eVD-GUARD\u572824\u5c0f\u65f6\u5185\u6301\u7eed\u5728\u6240\u6709\u8bbe\u5907\u4e0a\u663e\u793a\u51fa\u66f4\u9ad8\u7684DMA\u8def\u5f84\u8986\u76d6\u7387\uff08\u5e73\u57472.1\u500d\uff09\u3002\u7279\u522b\u662f\u5bf9\u4e8eXHCI\uff0cVD-GUARD\u53d1\u73b0\u7684DMA\u8def\u5f84\u662fMORPHUZZ\u76844\u500d\u3002MORPHUZZ\u53d1\u73b0\u7684\u6f0f\u6d1e\u6570\u91cf\u8f83\u5c11\u4e0e\u5176\u8f83\u4f4e\u7684DMA\u8def\u5f84\u8986\u76d6\u7387\u6709\u5173\uff0c\u8fd9\u66f4\u51f8\u663e\u4e86DMA\u5f15\u5bfc\u6a21\u7cca\u6d4b\u8bd5\u7684\u91cd\u8981\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe3&nbsp;MORPHUZZ\u548cVD-GUARD\u5728\u4e0d\u540c\u76ee\u6807\u865a\u62df\u8bbe\u5907\u4e0b\u7684DMA\u8def\u5f84\u8986\u76d6<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"684\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/6-1024x684.png\" alt=\"\" class=\"wp-image-6337\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6-1024x684.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6-300x200.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6-768x513.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6-150x100.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6-225x150.png 225w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/6.png 1524w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>RQ4\uff1aAblation Study<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9a8c\u8bc4\u4f30\u4e86\u4e3aDMA guided Fuzzing\u63d0\u51fa\u7684\u4e09\u4e2a\u7ec4\u4ef6\u7684\u6709\u6548\u6027\uff1a\u521d\u59cb\u79cd\u5b50\u6784\u5efa\u3001DMA Guided Metric\u548cDMA Guided Mutator\u3002\u4e3a\u4e86\u8fdb\u884c\u8fd9\u4e9b\u8bc4\u4f30\uff0cMORPHUZZ\u3001VD-GUARD\u53ca\u5176\u53d8\u79cd\u57283\u4e2a\u865a\u62df\u8bbe\u5907\u4e0a\u8fdb\u884c\u4e8624\u5c0f\u65f6\u7684\u6d4b\u8bd5\uff0c\u5b9e\u9a8c\u91cd\u590d5\u6b21\u3002\u88684\u8bf4\u660e\u542f\u7528\u4e86\u6240\u6709\u7ec4\u4ef6\u7684VD-GUARD\u5e73\u5747\u5728120\u5206\u949f\u5185\u53d1\u73b0\u6f0f\u6d1e\u3002\u7981\u7528\u4efb\u4f55\u7ec4\u4ef6\u90fd\u663e\u8457\u589e\u52a0\u4e86\u53d1\u73b0\u6f0f\u6d1e\u7684\u65f6\u95f4\uff083.9\u500d\u81f3218\u500d\uff09\uff0c\u8fd9\u4e2a\u5b9e\u9a8c\u8bc1\u660e\u4e86\u8fd9\u4e09\u4e2a\u7ec4\u4ef6\u5bf9\u4e8eHypervisor\u4e2d\u865a\u62df\u8bbe\u5907\u4e2d\u9ad8\u6548\u6f0f\u6d1e\u53d1\u73b0\u7684\u91cd\u8981\u6027\uff0c\u7a81\u51fa\u4e86\u5b83\u4eec\u5bf9Fuzzing\u7684\u8d21\u732e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u88684&nbsp;\u53d1\u73b0\u6f0f\u6d1e\u7684\u8017\u65f6<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"780\" height=\"684\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2023\/11\/7.png\" alt=\"\" class=\"wp-image-6338\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7.png 780w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-300x263.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-768x673.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-150x132.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2023\/11\/7-171x150.png 171w\" sizes=\"auto, (max-width: 780px) 100vw, 780px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u56db\u3001<\/strong><strong>\u603b\u7ed3<\/strong><strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u9488\u5bf9Hypervisor\u4e2d\u7684\u865a\u62df\u8bbe\u5907\u8fdb\u884c\u6f0f\u6d1e\u6316\u6398\uff0c\u63d0\u51fa\u4e86DMA\u5f15\u5bfc\u7684Fuzzing\u65b9\u6848\uff0c\u8bbe\u8ba1\u5e76\u5b9e\u73b0\u4e86VD-GUARD\u7684\u539f\u578b\u7cfb\u7edf\u3002VD-GUARD\u9996\u5148\u901a\u8fc7\u9759\u6001\u5206\u6790\u8bc6\u522b\u4e86DMA\u76f8\u5173\u7684\u64cd\u4f5c\u5e8f\u5217\uff0c\u7136\u540e\u5c06\u5176\u4f5c\u4e3aFuzzing\u7684\u53cd\u9988\uff0c\u8fd9\u6837\u53ef\u4ee5\u589e\u5f3a\u5bf9\u4e0d\u540cDMA\u903b\u8f91\u72b6\u6001\u7684\u63a2\u7d22\uff0c\u8fdb\u800c\u5728\u865a\u62df\u8bbe\u5907\u4e2d\u53d1\u73b0\u66f4\u591aDMA\u76f8\u5173\u7684\u6f0f\u6d1e\u3002\u6839\u636e\u5b9e\u9a8c\u8bc4\u4f30\uff0cVD-GUARD\u5728QEMU\u548cVirtualBox\u4e2d\u53d1\u73b0\u4e864\u4e2a0-day\u6f0f\u6d1e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u539f\u6587\u8fde\u63a5\uff1a<\/strong><a href=\"https:\/\/conf.researchr.org\/details\/ase-2023\/ase-2023-papers\/122\/VD-Guard-DMA-Guided-Fuzzing-for-Hypervisor-Virtual-Device\"><strong>https:\/\/conf.researchr.org\/details\/ase-2023\/ase-2023-papers\/122\/VD-Guard-DMA-Guided-Fuzzing-for-Hypervisor-Virtual-Device<\/strong><\/a><strong><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6b21\u4ecb\u7ecd\u7684\u8bba\u6587\u4f7f\u7528\u9759\u6001\u5206\u6790\u4e0e\u6a21\u7cca\u6d4b\u8bd5\u76f8\u7ed3\u5408\u7684\u65b9\u6cd5\uff0c\u9488\u5bf9\u865a\u62df\u673a\u76d1\u89c6\u5668\uff08Hypervisor\uff09\u4e2d\u865a\u62df\u8bbe\u5907DMA\u76f8\u5173\u7684\u6f0f\u6d1e\u8fdb\u884c\u6316\u6398\u3002\u8bba\u6587\u53d1\u8868\u4e8e\u8f6f\u4ef6\u5de5\u7a0b\u9876\u7ea7\u4f1a\u8baeASE 2023\uff0c\u4f5c\u8005\u56e2\u961f\u6765\u81ea\u4e8e\u4e2d\u56fd\u79d1\u5b66\u9662\u8f6f\u4ef6\u7814\u7a76\u6240\u548c\u4e0a\u6d77\u4ea4\u901a\u5927\u5b66\u3002 <a class=\"continue-reading-link\" href=\"http:\/\/202.112.238.40\/wp\/?p=6331\"> Continue reading <span class=\"meta-nav\">&rarr; <\/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-6331","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\/6331","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=6331"}],"version-history":[{"count":1,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/6331\/revisions"}],"predecessor-version":[{"id":6339,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/6331\/revisions\/6339"}],"wp:attachment":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6331"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}