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ClamAV: Buffer overflow in Freshclam

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200605-03 / clamav
Release Date May 02, 2006
Latest Revision May 02, 2006: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-antivirus/clamav < 0.88.2 >= 0.88.2 All supported architectures

Related bugreports: #131791

Synopsis

Freshclam is vulnerable to a buffer overflow that could lead to execution of arbitrary code.

2.  Impact Information

Background

ClamAV is a GPL virus scanner. Freshclam is a utility to download virus signature updates.

Description

Ulf Harnhammar and an anonymous German researcher discovered that Freshclam fails to check the size of the header data returned by a webserver.

Impact

By enticing a user to connect to a malicious webserver an attacker could cause the execution of arbitrary code.

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-0.88.2"

4.  References



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Page updated May 02, 2006

Summary: This is a Gentoo Linux Security Advisory

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