Gentoo: libTIFF User-assisted execution of arbitrary
Posted by Benjamin D. Thomas   
Gentoo Multiple buffer underflow vulnerabilities in libTIFF may allow for the remote execution of arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 200809-07
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                                              http://security.gentoo.org/=

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    Severity: Normal
       Title: libTIFF: User-assisted execution of arbitrary code
        Date: September 08, 2008
        Bugs: #234080
          ID: 200809-07

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Synopsis
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Multiple buffer underflow vulnerabilities in libTIFF may allow for the
remote execution of arbitrary code.

Background
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libTIFF provides support for reading and manipulating TIFF (Tagged
Image File Format) images.

Affected packages
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      -------------------------------------------------------------------=

       Package          /  Vulnerable  /                      Unaffected
      -------------------------------------------------------------------=

    1  media-libs/tiff     < 3.8.2-r4                        >=3D 3.8.2-r=
4

Description
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Drew Yao (Apple Product Security) and Clay Wood reported multiple
buffer underflows in the LZWDecode() and LZWDecodeCompat() functions in
tif_lzw.c when processing TIFF files.

Impact
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A remote attacker could entice a user to open a specially crafted TIFF
file with an application making use of libTIFF, possibly resulting in
the remote execution of arbitrary code with the privileges of the user
running the application.

Workaround
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There is no known workaround at this time.

Resolution
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All libTIFF users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=3Dmedia-libs/tiff-3.8.2-r4"

References
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    [ 1 ] CVE-2008-2327
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-2327

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-200809-07.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 2008 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