ClamAV: Multiple Denials of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200808-07 / clamav
Release Date	August 08, 2008
Latest Revision	August 08, 2008: 01
Impact	low
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	< 0.93.3	>= 0.93.3	All supported architectures

Related bugreports: #204340, #227351

Synopsis

Multiple vulnerabilities in ClamAV may result in a Denial of Service.

2. Impact Information

Background

Clam AntiVirus is a free anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways.

Description

Damian Put has discovered an out-of-bounds memory access while processing Petite files (CVE-2008-2713, CVE-2008-3215). Also, please note that the 0.93 ClamAV branch fixes the first of the two attack vectors of CVE-2007-6595 concerning an insecure creation of temporary files vulnerability. The sigtool attack vector seems still unfixed.

Impact

A remote attacker could entice a user or automated system to scan a specially crafted Petite file, possibly resulting in a Denial of Service (daemon crash). Also, the insecure creation of temporary files vulnerability can be triggered by a local user to perform a symlink attack.

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-0.93.3"

4. References

Updated August 08, 2008

Summary: This is a Gentoo Linux Security Advisory

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