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Reverse Engineer Wanted

Secunia offers a Security Specialist position with emphasis on
reverse engineering of software and exploit code, auditing of
source code, and analysis of vulnerability reports.

http://secunia.com/secunia_security_specialist/

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TITLE:
MyBB editpost.php Cross-Site Request Forgery

SECUNIA ADVISORY ID:
SA20659

VERIFY ADVISORY:
http://secunia.com/advisories/20659/

CRITICAL:
Less critical

IMPACT:
Hijacking

WHERE:
>From remote

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

DESCRIPTION:
Bartek Ryniec 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 forum
posts to be deleted via HTTP GET requests without performing any
validity checks to verify the request. This can be exploited by e.g.
a non-privileged user to delete arbitrary forum post when a malicious
post that contains a specially crafted [img] tag is viewed by the
administrative user.

Example:
[img]http://[host]/editpost.php?action=deletepost&pid=[post_id]&delete=yes[/img]

The vulnerability has been confirmed in version 1.1.3 and 1.1.4.
Other versions may also be affected.

SOLUTION:
The vulnerability has been partially fixed in version 1.1.5 by only
allowing POST requests when deleting forum posts.

Do not browse untrusted web sites while being logged in to MyBB.

PROVIDED AND/OR DISCOVERED BY:
Bartek Ryniec

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About:
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