Zone Labs IMsecure Active Link Filter Bypass Vulnerability
Secunia Advisory: SA13169
Release Date: 2004-11-12
Last Update: 2005-02-21
Popularity: 5,326 views

Critical:
Less critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Patch

Software:Zone Labs IMsecure
Zone Labs IMsecure Pro 1.x

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CVE reference:CVE-2004-1517


Description:
Paul Kurczaba has reported a vulnerability in Zone Labs IMsecure, which can be exploited by malicious people to bypass certain security restrictions.

The vulnerability is caused due to a canonicalization error in the Active Link filter, which blocks URLs in IM messages. This can be exploited to bypass the filter by using encoded representations for various characters.

The vulnerability has been reported in IMsecure and IMsecure Pro versions prior to 1.5.

Solution:
Update to version 1.5 or later.

Provided and/or discovered by:
Paul Kurczaba, Kurczaba Associates.

Changelog:
2004-11-15: Added link to vendor advisory.
2005-02-21: Added CVE reference.

Original Advisory:
Zone Labs:
http://download.zonelabs.com/bin/free/securityAlert/16.html

Kurczaba Associates:
http://www.kurczaba.com/html/security/0410141.htm


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