[ GLSA 200607-03 ] libTIFF: Multiple buffer overflows

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

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Gentoo Linux Security Advisory                           GLSA 200607-03
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libTIFF: Multiple buffer overflows
      Date: July 09, 2006
      Bugs: #135881
        ID: 200607-03

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Synopsis
========

libTIFF contains buffer overflows that could result in arbitrary code
execution.

Background
==========

libTIFF provides support for reading and manipulating TIFF images.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  media-libs/tiff     < 3.8.2-r1                        >= 3.8.2-r1

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

A buffer overflow has been found in the t2p_write_pdf_string function
in tiff2pdf, which can been triggered with a TIFF file containing a
DocumentName tag with UTF-8 characters. An additional buffer overflow
has been found in the handling of the parameters in tiffsplit.

Impact
======

A remote attacker could entice a user to load a specially crafted TIFF
file, resulting in the possible 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-3.8.2-r1"

References
==========

  [ 1 ] CVE-2006-2193
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2193
  [ 2 ] CVE-2006-2656
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2656

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

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

  http://security.gentoo.org/glsa/glsa-200607-03.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 2006 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

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