ClamAV: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200704-21 / ClamAV
Release Date	April 24, 2007
Latest Revision	April 24, 2007: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	< 0.90.2	>= 0.90.2	All supported architectures

Related bugreports: #174375

Synopsis

Multiple vulnerabilities have been discovered in ClamAV allowing for the remote execution of arbitrary code.

2. Impact Information

Background

ClamAV is a GPL virus scanner.

Description

iDefense Labs have reported a stack-based buffer overflow in the cab_unstore() function when processing negative values in .cab files. Multiple file descriptor leaks have also been reported in chmunpack.c, pdf.c and dblock.c when processing .chm files.

Impact

A remote attacker could send a specially crafted CHM file to the scanner, possibly resulting in the remote execution of arbitrary code with the privileges of the user running ClamAV.

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-0.90.2"

4. References

Page updated April 24, 2007

Summary: This is a Gentoo Linux Security Advisory

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