----------------------------------------------------------------------

Try a new way to discover vulnerabilities that ALREADY EXIST in your
IT infrastructure.

Join the FREE BETA test of the Network Software Inspector (NSI)!
http://secunia.com/network_software_inspector/

The NSI enables you to INSPECT, DISCOVER, and DOCUMENT
vulnerabilities in more than 4,000 different Windows applications.

----------------------------------------------------------------------

TITLE:
Cisco Products HTTP Unicode Encoding Detection Bypass

SECUNIA ADVISORY ID:
SA25285

VERIFY ADVISORY:
http://secunia.com/advisories/25285/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

OPERATING SYSTEM:
Cisco Intrusion Prevention System (IPS) 5.x
http://secunia.com/product/5600/

SOFTWARE:
Cisco IOS Firewall Feature Set 12.x
http://secunia.com/product/721/
Cisco IOS Firewall Feature Set 11.x
http://secunia.com/product/722/

DESCRIPTION:
A vulnerability has been reported in various Cisco products, which
can be exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to an error in the handling of
full-width and half-width unicode encoded HTTP traffic. This can be
exploited to bypass content scanning and evade detection by an IPS or
firewall.

The vulnerability affects the following products:
* Cisco Intrusion Prevention System (IPS)
* Cisco IOS with Firewall/IPS Feature Set

SOLUTION:
No fix or workaround is currently available.

PROVIDED AND/OR DISCOVERED BY:
Fatih Ozavci and Caglar Cakici, GamaSEC

ORIGINAL ADVISORY:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sr-20070514-unicode.shtml

GamaSEC:
http://www.gamasec.net/english/gs07-01.html

OTHER REFERENCES:
US-CERT VU#739224:
http://www.kb.cert.org/vuls/id/739224

----------------------------------------------------------------------

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.

----------------------------------------------------------------------