{"id":114,"date":"2021-06-18T09:03:41","date_gmt":"2021-06-18T01:03:41","guid":{"rendered":"https:\/\/www.anger.ltd\/?p=114"},"modified":"2021-06-18T16:47:55","modified_gmt":"2021-06-18T08:47:55","slug":"cve-2019-11043-php-loophole-and-repair-method-2","status":"publish","type":"post","link":"https:\/\/www.anger.ltd\/index.php\/2021\/06\/18\/cve-2019-11043-php-loophole-and-repair-method-2\/","title":{"rendered":"CVE-2019-11043-PHP Loophole and Repair Method"},"content":{"rendered":"\u57289 \u6708 14 \u65e5\u81f3 18 \u4e3e\u529e\u7684 Real World CTF \u4e2d\uff0c\u56fd\u5916\u5b89\u5168\u7814\u7a76\u5458 Andrew Danau \u5728\u89e3\u51b3\u4e00\u9053 CTF \u9898\u76ee\u65f6\u53d1\u73b0\uff0c\u5411\u76ee\u6807\u670d\u52a1\u5668 URL \u53d1\u9001 %0a \u7b26\u53f7\u65f6\uff0c\u670d\u52a1\u8fd4\u56de\u5f02\u5e38\uff0c\u7591\u4f3c\u5b58\u5728\u6f0f\u6d1e\u3002\n\n<!-- \/wp:post-content --><!-- wp:paragraph -->\n\n9 \u6708 26 \u65e5\uff0cPHP \u5b98\u65b9\u53d1\u5e03\u6f0f\u6d1e\u901a\u544a\uff0c\u5176\u4e2d\u6307\u51fa\uff1a\u4f7f\u7528 Nginx + php-fpm \u7684\u670d\u52a1\u5668\uff0c\u5728\u90e8\u5206\u914d\u7f6e\u4e0b\uff0c\u5b58\u5728\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u3002\u5e76\u4e14\u8be5\u914d\u7f6e\u5df2\u88ab\u5e7f\u6cdb\u4f7f\u7528\uff0c\u5371\u5bb3\u8f83\u5927\u3002\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u6f0f\u6d1e PoC \u5728 10 \u6708 22 \u65e5\u516c\u5f00\u3002\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u6f0f\u6d1e\u63cf\u8ff0\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\nNginx \u4e0a fastcgi_split_path_info \u5728\u5904\u7406\u5e26\u6709 %0a \u7684\u8bf7\u6c42\u65f6\uff0c\u4f1a\u56e0\u4e3a\u9047\u5230\u6362\u884c\u7b26 \\n \u5bfc\u81f4 PATH_INFO \u4e3a\u7a7a\u3002\u800c php-fpm \u5728\u5904\u7406 PATH_INFO \u4e3a\u7a7a\u7684\u60c5\u51b5\u4e0b\uff0c\u5b58\u5728\u903b\u8f91\u7f3a\u9677\u3002\u653b\u51fb\u8005\u901a\u8fc7\u7cbe\u5fc3\u7684\u6784\u9020\u548c\u5229\u7528\uff0c\u53ef\u4ee5\u5bfc\u81f4\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u3002\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u5f71\u54cd\u8303\u56f4\nNginx + php-fpm \u7684\u670d\u52a1\u5668\uff0c\u5728\u4f7f\u7528\u5982\u4e0b\u914d\u7f6e\u7684\u60c5\u51b5\u4e0b\uff0c\u90fd\u53ef\u80fd\u5b58\u5728\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u3002\n\n<!-- \/wp:paragraph --><!-- wp:code -->\n<pre class=\"wp-block-code\"><code>location ~ [^\/]\\.php(\/|$) {\n\n        fastcgi_split_path_info ^(.+?\\.php)(\/.*)$;\n\n        fastcgi_param PATH_INFO       $fastcgi_path_info;\n\n        fastcgi_pass   php:9000;\n\n        ...\n\n  }\n\n}<\/code><\/pre>\n<!-- \/wp:code --><!-- wp:paragraph -->\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u6f0f\u6d1e\u590d\u73b0\n\u4f7f\u7528&nbsp;<a href=\"https:\/\/github.com\/neex\/phuip-fpizdam\">https:\/\/github.com\/neex\/phuip-fpizdam<\/a>&nbsp;\u4e2d\u7ed9\u51fa\u7684\u5de5\u5177\uff0c\u53d1\u9001\u6570\u636e\u5305\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u6f0f\u6d1e\u5228\u6790\n\u56e0\u4e3a\u201cfpm_main.c\u201d\u6587\u4ef6\u7684\u7b2c1150\u884c\u4ee3\u7801\u4e2d\u7531\u4e8e\\n(%0a)\u7684\u4f20\u5165\u5bfc\u81f4nginx\u4f20\u9012\u7ed9php-fpm\u7684PATH_INFO\u4e3a\u7a7a\u3002\n<code>https:\/\/github.com\/php\/php-src\/blob\/master\/sapi\/fpm\/fpm\/fpm_main.c#L1150<\/code>\n\u8fdb\u800c\u5bfc\u81f4\u53ef\u4ee5\u901a\u8fc7FCGI_PUTENV\u4e0ePHP_VALUE\u76f8\u7ed3\u5408\uff0c\u4fee\u6539\u5f53\u524d\u7684php-fpm\u8fdb\u7a0b\u4e2d\u7684php\u914d\u7f6e\u3002\u5728\u7279\u6b8a\u6784\u9020\u7684\u914d\u7f6e\u751f\u6548\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u89e6\u53d1\u4efb\u610f\u4ee3\u7801\u6267\u884c\u3002\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n\u89e3\u51b3\u65b9\u6848\n\u65b9\u6cd51\uff1a\u5728\u4e0d\u5f71\u54cd\u6b63\u5e38\u4e1a\u52a1\u7684\u60c5\u51b5\u4e0b\uff0c\u5220\u9664 Nginx \u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u5982\u4e0b\u914d\u7f6e\uff1a\n\n<!-- \/wp:paragraph --><!-- wp:code -->\n<pre class=\"wp-block-code\"><code>fastcgi_split_path_info ^(.+?\\.php)(\/.*)$;\nfastcgi_param PATH_INFO       $fastcgi_path_info;\n<\/code><\/pre>\n<!-- \/wp:code --><!-- wp:paragraph -->\n\n\u65b9\u6cd52\uff1a\u5bf9fastcgi\u51fd\u6570\u589e\u52a0\u5224\u65ad\uff0c\u540c\u65f6\u5220\u9664fastcgi_param PATH_INFO\u3001$fastcgi_path_info:\n\n<!-- \/wp:paragraph --><!-- wp:code -->\n<pre class=\"wp-block-code\"><code>\u2026\u2026\nfastcgi_split_path_info ^(.+?\\.php)(\/.*)$;\nif ( !-f $document_root$fastcgi_script_name){\nreturn 404;\n}\nfastcgi_param HTTP_PROXY \"\";\n\u2026\u2026\n<\/code><\/pre>\n<!-- \/wp:code --><!-- wp:paragraph -->\n\n\u65b9\u6cd53\uff1a\u4fee\u6539php.ini\u7684cgi.fix_pathinfo\u914d\u7f6e\u4e3a0;\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n\nOriginal address\uff1a<a href=\"https:\/\/blog.moper.net\/1369.html\">https:\/\/blog.moper.net\/1369.html<\/a>\n\n<!-- wp:code -->\n<pre class=\"wp-block-code\"><code>\u53c2\u8003\n<a href=\"https:\/\/mrxn.net\/news\/640.html\">https:\/\/mrxn.net\/news\/640.html<\/a>\n<a href=\"https:\/\/www.gdcert.com.cn\/index\/news_detail\/W1paQzEYCh0cDRkcGw\">https:\/\/www.gdcert.com.cn\/index\/news_detail\/W1paQzEYCh0cDRkcGw<\/a><\/code><\/pre>\n<!-- \/wp:code -->\n\n<!-- wp:paragraph -->\n\n<!-- \/wp:paragraph -->","protected":false},"excerpt":{"rendered":"<p>\u57289 \u6708 14 \u65e5\u81f3 18 \u4e3e\u529e\u7684 Real World CTF \u4e2d\uff0c\u56fd\u5916\u5b89\u5168\u7814\u7a76\u5458 Andrew Danau \u5728\u89e3\u51b3\u4e00\u9053 CTF \u9898\u76ee\u65f6\u53d1\u73b0\uff0c\u5411\u76ee\u6807\u670d\u52a1\u5668 URL \u53d1\u9001 %0a \u7b26\u53f7\u65f6\uff0c\u670d\u52a1\u8fd4\u56de\u5f02\u5e38\uff0c\u7591\u4f3c\u5b58\u5728 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-114","post","type-post","status-publish","format-standard","hentry","category-3"],"_links":{"self":[{"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/posts\/114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/comments?post=114"}],"version-history":[{"count":6,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/posts\/114\/revisions"}],"predecessor-version":[{"id":127,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/posts\/114\/revisions\/127"}],"wp:attachment":[{"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/media?parent=114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/categories?post=114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.anger.ltd\/index.php\/wp-json\/wp\/v2\/tags?post=114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}