ClamAV: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200511-04 / clamav
Release Date	November 06, 2005
Latest Revision	May 22, 2006: 02
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	< 0.87.1	>= 0.87.1	All supported architectures

Related bugreports: #109213

Synopsis

ClamAV has many security flaws which make it vulnerable to remote execution of arbitrary code and a Denial of Service.

2. Impact Information

Background

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

Description

ClamAV has multiple security flaws: a boundary check was performed incorrectly in petite.c, a buffer size calculation in unfsg_133 was incorrect in fsg.c, a possible infinite loop was fixed in tnef.c and a possible infinite loop in cabd_find was fixed in cabd.c . In addition to this, Marcin Owsiany reported that a corrupted DOC file causes a segmentation fault in ClamAV.

Impact

By sending a malicious attachment to a mail server that is hooked with ClamAV, a remote attacker could cause a Denial of Service or 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-0.87.1"

4. References

Page updated November 06, 2005

Summary: This is a Gentoo Linux Security Advisory

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