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TITLE:
vBulletin MCP Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA30755

VERIFY ADVISORY:
http://secunia.com/advisories/30755/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
vBulletin 3.x
http://secunia.com/product/3212/

DESCRIPTION:
A vulnerability has been reported in vBulletin, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "redirect" parameter in modcp/index.php is not
properly sanitised before being returned to the user. This can be
exploited to execute arbitrary HTML and script code in a user's
browser session in context of an affected site.

NOTE: Reportedly, this can be exploited to inject and execute
arbitrary PHP code on an affected system, but requires that the
administrator is logged in or logs in e.g. when following a specially
crafted link.

The vulnerability is reported in versions 3.7.1 PL1, 3.6.10 PL1, and
all previous 3.x versions.

SOLUTION:
Update to version 3.7.1 PL2 or 3.6.10 PL2.

PROVIDED AND/OR DISCOVERED BY:
Jessica Hope and anonymous persons

ORIGINAL ADVISORY:
vBulletin:
http://www.vbulletin.com/forum/showthread.php?t=275889

Jessica Hope:
http://seclists.org/fulldisclosure/2008/Jun/0262.html

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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.

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