Gentoo: ClamAV Multiple vulnerabilities
Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities have been discovered in ClamAV allowing for the remote execution of arbitrary code. iDefense Labs have reported a stack-based buffer overflow in the cab_unstore() function when processing negative values in .cab files. Multiple file descriptor leaks have also been reported in chmunpack.c, pdf.c and dblock.c when processing .chm files.
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Gentoo Linux Security Advisory                           GLSA 200704-21
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                                            http://security.gentoo.org/
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  Severity: High
     Title: ClamAV: Multiple vulnerabilities
      Date: April 24, 2007
      Bugs: #174375
        ID: 200704-21

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Synopsis
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Multiple vulnerabilities have been discovered in ClamAV allowing for
the remote execution of arbitrary code.

Background
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ClamAV is a GPL virus scanner.

Affected packages
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    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  app-antivirus/clamav      < 0.90.2                      >=3D 0.90.2

Description
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iDefense Labs have reported a stack-based buffer overflow in the
cab_unstore() function when processing negative values in .cab files.
Multiple file descriptor leaks have also been reported in chmunpack.c,
pdf.c and dblock.c when processing .chm files.

Impact
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A remote attacker could send a specially crafted CHM file to the
scanner, possibly resulting in the remote execution of arbitrary code
with the privileges of the user running ClamAV.

Workaround
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There is no known workaround at this time.

Resolution
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All ClamAV users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=3Dapp-antivirus/clamav-0.90.2"

References
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  [ 1 ] CVE-2007-1745
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2007-1745
  [ 2 ] CVE-2007-1997
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2007-1997

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

  http://security.gentoo.org/glsa/glsa-200704-21.xml

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.

License
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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.

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