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TITLE:
ZyXEL ZyWALL / ZyNOS Cross-Site Request Forgery

SECUNIA ADVISORY ID:
SA26381

VERIFY ADVISORY:
http://secunia.com/advisories/26381/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

OPERATING SYSTEM:
ZyXEL ZyWALL Series
http://secunia.com/product/147/
ZyXEL ZyNOS 3.x
http://secunia.com/product/149/

DESCRIPTION:
Henri Lindberg has reported a vulnerability in ZyXEL ZyWALL / ZyNOS,
which can be exploited by malicious people to conduct cross-site
request forgery attacks.

The application allows users to perform certain actions via HTTP
requests without performing any validity checks to verify the
request. This can be exploited to perform certain actions when a
logged in administrator is tricked into visiting a malicious
website.

NOTE: Reportedly, this can further be exploited to conduct script
insertion attacks.

The vulnerabilities are reported in Zyxell ZyWALL 2 and in ZyNOS
firmware version V3.62(WK.6). Other versions may also be affected.

SOLUTION:
Do not browser untrusted sites while being logged in to the
administrative section of the device.

PROVIDED AND/OR DISCOVERED BY:
Henri Lindberg of Louhi Networks.

ORIGINAL ADVISORY:
http://www.louhi.fi/advisory/zyxel_070810.txt

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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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