ClamAV vulnerable to buffer overflow via malicious database mirror

2006-06-28T00:00:00
ID VU:599220
Type cert
Reporter CERT
Modified 2006-06-29T19:59:00

Description

Overview

The Open Source anti-virus program ClamAV's update engine, freshclam, contains a buffer overflow vulnerability. If exploited, an attacker could create a denial-of-service condition, or possibly run arbitrary code with the privileges of the freshclam process.

Description

Freshclam is a command line utility that installs and updates virus signatures that are used by the ClamAV anti-virus software. It uses the HTTP protocol to perform file downloads from various web servers that host virus signature updates.

By directly changing one of the HTTP mirrors, or by using another means of redirecting the freshclam process to an attacker-controlled HTTP server, the attacker could cause a denial-of-service condition by sending an oversized HTTP header to the freshclam process.

Note that ClamAV and freshclam server and client programs are available for Microsoft Windows, Linux, Apple OS X, and BSD operating systems.


Impact

A remote attacker may create a denial-of-service condition. The vendor reports that remote execution of arbitrary code would not be easy due to diversity of client platforms and architectures.


Solution

Upgrade
See the systems affected section of this document for information about specific vendors. Users who compile ClamAV from source are encouraged to upgrade to ClamAV version 0.88.2.


Vendor Information

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__ SUSE Linux

Updated: June 28, 2006

Status

__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

SUSE Linux has released RPM patches the will update ClamAV to its newest version.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

__ Clam AntiVirus

Updated: June 28, 2006

Status

__ Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The ClamAV project has released version 0.88.2 to address this vulnerability.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

__ Debian GNU/Linux

Updated: June 28, 2006

Status

__ Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The Debian project has fixed this problem for the stable distribution (sarge), and for the unstable distribution (sid). The old stable distribution (woody) does not contain clamav packages.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | | N/A

References

  • <http://www.clamav.net/security/0.88.2.html>
  • <http://secunia.com/advisories/19880>
  • <http://www.debian.org/security/2006/dsa-1050>
  • <http://lists.apple.com/archives/security-announce/2006/Jun/msg00000.html>

Credit

This document was written by Ryan Giobbi.

Other Information

CVE IDs: | CVE-2006-1989
---|---
Severity Metric:** | 0.11
Date Public:
| 2006-06-27
Date First Published: | 2006-06-28
Date Last Updated: | 2006-06-29 19:59 UTC
Document Revision: | 28