[SA18603] MyBB User Control Panel Cross-Site Request Forgery

TITLE:
MyBB User Control Panel Cross-Site Request Forgery

SECUNIA ADVISORY ID:
SA18603

VERIFY ADVISORY:
http://secunia.com/advisories/18603/

CRITICAL:
Less critical

IMPACT:
Hijacking

WHERE:
>From remote

SOFTWARE:
MyBB (formerly MyBulletinBoard) 1.x
http://secunia.com/product/4479/

DESCRIPTION:
Roozbeh Afrasiabi has discovered a vulnerability in MyBB, which can
be exploited by malicious people to conduct cross-site request
forgery attacks.

The vulnerability is caused due to the application allowing users to
perform certain actions via HTTP POST requests without performing any
validity checks to verify the user's request. This can e.g. be
exploited to inject arbitrary HTML and script code, which will be
executed in a user's browser session in context of an affected site
when the malicious user data is viewed.

Example:
Input passed to the "notepad" parameter when editing the personal pad
and the "signature" parameter when editing the signature in the user
control panel.

The vulnerability has been confirmed in version 1.02. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that HTTP requests are properly
validated.

PROVIDED AND/OR DISCOVERED BY:
Roozbeh Afrasiabi

ORIGINAL ADVISORY:
http://kapda.ir/advisory-241.html

---

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/

Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.