From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Apr 09 2004 - 05:53:10 CDT

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TITLE:
Kerio Personal Firewall URL Handling Denial of Service

SECUNIA ADVISORY ID:
SA11331

VERIFY ADVISORY:
http://secunia.com/advisories/11331/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
Kerio Personal Firewall 4.x

DESCRIPTION:
Emmanouel Kellinis has reported a vulnerability in Kerio Personal
Firewall, allowing malicious people to cause a DoS (Denial of
Service).

The problem is that Kerio Personal Firewall fails to handle "%12" and
"%13" characters in URLs when web filtering is enabled. A single
instance reportedly causes the GUI to crash; multiple instances
eventually causes Kerio Personal Firewall to crash.

This has been reported in version 4.0.13. Other versions may also be
affected.

SOLUTION:
Disable web filtering until an update is available.

Use another product.

PROVIDED AND/OR DISCOVERED BY:
Emmanouel Kellinis

ORIGINAL ADVISORY:
http://www.cipher.org.uk/index.php?p=cipher/advisories.cipher

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