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ClamAV: Multiple issues


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


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


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


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


There is no known workaround at this time.


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

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