Gentoo alert: ClamAV RAR Archive Remote Denial Of Service Vulnerability

Posted by dave on Apr 7, 2004 10:25 AM EDT
Mailing list; By Kurt Lieber <klieber@gentoo.org> 		Mail this story
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"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." 



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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


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

Background

"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


    -------------------------------------------------------------------
     Package          /   Vulnerable   /                    Unaffected
    -------------------------------------------------------------------
     net-mail/clamav        < 0.68                          > 0.68.1

Description


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


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


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

Resolution


ClamAV users should upgrade to version 0.68.1 or later:

    # emerge sync

    # emerge -pv ">net-mail/clamav-0.68.1"
    # emerge ">net-mail/clamav-0.68.1"

Concerns?


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
[e-mail:security@gentoo.org] or alternatively, you may file a bug at
http://bugs.gentoo.org.

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