GLSA 200506-23: Clam AntiVirus: Denial of Service vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	Clam AntiVirus: Denial of Service vulnerability
Date:	06/27/2005
Bugs:	#96960
ID:	200506-23

Synopsis

Clam AntiVirus is vulnerable to a Denial of Service attack when processing certain Quantum archives.

Background

Clam AntiVirus is a GPL anti-virus toolkit, designed for integration with mail servers to perform attachment scanning. Clam AntiVirus also provides a command line scanner and a tool for fetching updates of the virus database.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-antivirus/clamav	< 0.86.1	>= 0.86.1	All supported architectures

Description

Andrew Toller and Stefan Kanthak discovered that a flaw in libmspack's Quantum archive decompressor renders Clam AntiVirus vulnerable to a Denial of Service attack.

Impact

A remote attacker could exploit this vulnerability to cause a Denial of Service by sending a specially crafted Quantum archive to the server.

Workaround

There is no known workaround at this time.

Resolution

All Clam AntiVirus users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.86.1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200506-23.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.