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TITLE:
phpBB eXtreme Styles Module "phpEx" Local File Inclusion

SECUNIA ADVISORY ID:
SA29487

VERIFY ADVISORY:
http://secunia.com/advisories/29487/

CRITICAL:
Moderately critical

IMPACT:
Exposure of system information, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
eXtreme Styles 2.x (module for phpBB)
http://secunia.com/product/18020/

DESCRIPTION:
bd0rk has discovered a vulnerability in the eXtreme Styles module
(XS-Mod) for phpBB, which can be exploited by malicious people to
disclose sensitive information.

Input passed to the "phpEx" parameter in admin/admin_xs.php (when
"setmodules" is set) is not properly verified before being used to
include files. This can be exploited to include arbitrary files from
local resources via directory traversal attacks.

Successful exploitation requires that "register_globals" is enabled.

The vulnerability is confirmed in version 2.4.0 and reported in
version 2.3.1. Other versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly verified.

PROVIDED AND/OR DISCOVERED BY:
bd0rk

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/5301

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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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