[ GLSA 200709-14 ] ClamAV: Multiple vulnerabilities

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• - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200709-14
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  Severity: High
     Title: ClamAV: Multiple vulnerabilities
      Date: September 20, 2007
      Bugs: #189912
        ID: 200709-14

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Synopsis

Vulnerabilities have been discovered in ClamAV allowing remote execution of arbitrary code and Denial of Service attacks.

Background

Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways.

Affected packages

     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  app-antivirus/clamav      < 0.91.2                      >= 0.91.2

Description

Nikolaos Rangos discovered a vulnerability in ClamAV which exists because the recipient address extracted from email messages is not properly sanitized before being used in a call to "popen()" when executing sendmail (CVE-2007-4560). Also, NULL-pointer dereference errors exist within the "cli_scanrtf()" function in libclamav/rtf.c and Stefanos Stamatis discovered a NULL-pointer dereference vulnerability within the "cli_html_normalise()" function in libclamav/htmlnorm.c (CVE-2007-4510). Impact

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The unsanitized recipient address can be exploited to execute arbitrary code with the privileges of the clamav-milter process by sending an email with a specially crafted recipient address to the affected system. Also, the NULL-pointer dereference errors can be exploited to crash ClamAV. Successful exploitation of the latter vulnerability requires that clamav-milter is started with the "black hole" mode activated, which is not enabled by default.

Workaround

There is no known workaround at this time.

Resolution

All ClamAV users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.91.2"

References

  [ 1 ] CVE-2007-4510
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4510   [ 2 ] CVE-2007-4560
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4560

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Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200709-14.xml

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 security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

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http://creativecommons.org/licenses/by-sa/2.5

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