[ GLSA 200404-07 ] ClamAV RAR Archive Remote Denial Of Service Vulnerability

[Kurt Lieber]

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Gentoo Linux Security Advisory GLSA 200404-07
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http://security.gentoo.org
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Severity: Normal
Title: ClamAV RAR Archive Remote Denial Of Service Vulnerability

Date: April 07, 2004=20
Bugs: #45357
ID: 200404-07

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Synopsis
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ClamAV is vulnerable to a denial of service attack when processing
certain RAR archives.

Background
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=46rom http://www.clamav.net/ :

"Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose
of this software is the integration with mail servers (attachment
scanning). The package provides a flexible and scalable multi-threaded
daemon, a command line scanner, and a tool for automatic updating via
Internet. The programs are based on a shared library distributed with
the Clam AntiVirus package, which you can use with your own software.
Most importantly, the virus database is kept up to date."

Affected packages
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Package / Vulnerable / Unaffected
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net-mail/clamav <=3D 0.68 >=3D 0.68.1

Description
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Certain types of RAR archives, including those created by variants of
the W32.Beagle.A@mm worm, may cause clamav to crash when it attempts to
process them.

Impact
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This vulnerability causes a Denial of Service in the clamav process.
Depending on configuration, this may cause dependent services such as
mail to fail as well.

Workaround
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A workaround is not currently known for this issue. All users are
advised to upgrade to the latest version of the affected package.

Resolution
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ClamAV users should upgrade to version 0.68.1 or later:

# emerge sync

# emerge -pv ">=3Dnet-mail/clamav-0.68.1"
# emerge ">=3Dnet-mail/clamav-0.68.1"

Concerns?
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Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

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