[ GLSA 200505-07 ] libTIFF: Buffer overflow

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200505-07
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libTIFF: Buffer overflow
      Date: May 10, 2005
      Bugs: #91584
        ID: 200505-07

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Synopsis
========

The libTIFF library is vulnerable to a buffer overflow, potentially
resulting in the execution of arbitrary code.

Background
==========

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

Affected packages
=================

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  media-libs/tiff       < 3.7.2                            >= 3.7.2

Description
===========

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a
stack based buffer overflow in the libTIFF library when reading a TIFF
image with a malformed BitsPerSample tag.

Impact
======

Successful exploitation would require the victim to open a specially
crafted TIFF image, resulting in the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libTIFF users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/tiff-3.7.2"

References
==========

  [ 1 ] LIBTIFF BUG#863
        http://bugzilla.remotesensing.org/show_bug.cgi?id=843

Availability
============

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

  http://security.gentoo.org/glsa/glsa-200505-07.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 2005 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/2.0

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