ClamAV: Multiple issues

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200501-46 / clamav
Release Date	January 31, 2005
Latest Revision	May 22, 2006: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	<= 0.80	>= 0.81	All supported architectures

Related bugreports: #78656, #79194

Synopsis

ClamAV contains two vulnerabilities that could lead to Denial of Service and evasion of virus scanning.

2. Impact Information

Background

ClamAV is an antivirus toolkit. It includes a multi-threaded daemon and a command line scanner.

Description

ClamAV fails to properly scan ZIP files with special headers (CAN-2005-0133) and base64 encoded images in URLs.

Impact

By sending a base64 encoded image file in a URL an attacker could evade virus scanning. By sending a specially-crafted ZIP file an attacker could cause a Denial of Service by crashing the clamd daemon.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ClamAV users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.81"

4. References

Page updated January 31, 2005

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.