ClamAV: Multiple Vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200610-10 / clamav
Release Date	October 24, 2006
Latest Revision	October 24, 2006: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	< 0.88.5	>= 0.88.5	All supported architectures

Related bugreports: #151561

Synopsis

ClamAV is vulnerable to a heap-based buffer overflow potentially allowing remote execution of arbitrary code and a Denial of Service.

2. Impact Information

Background

ClamAV is a GPL virus scanner.

Description

Damian Put and an anonymous researcher reported a potential heap-based buffer overflow vulnerability in rebuildpe.c responsible for the rebuilding of an unpacked PE file, and a possible crash in chmunpack.c in the CHM unpacker.

Impact

By sending a malicious attachment to a mail server running ClamAV, or providing a malicious file to ClamAV through any other method, a remote attacker could cause a Denial of Service and potentially the execution of arbitrary code with the permissions 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-0.88.5"

4. References

Updated October 24, 2006

Summary: This is a Gentoo Linux Security Advisory

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