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Gentoo Linux Security Advisory                           GLSA 200505-07
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                                            https://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
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200505-07

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
https://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.

https://creativecommons.org/licenses/by-sa/2.0/