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TUCoPS :: Linux :: Gentoo :: b06-1776.htm

Zgv, xzgv: heap overflow



zgv, xzgv: Heap overflow
zgv, xzgv: Heap overflow



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Gentoo Linux Security Advisory                           GLSA 200604-10
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: zgv, xzgv: Heap overflow
      Date: April 21, 2006
      Bugs: #127008
        ID: 200604-10

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Synopsis
=======
xzgv and zgv attempt to decode JPEG images within the CMYK/YCCK colour
space incorrectly, potentially resulting in the execution of arbitrary
code.

Background
=========
xzgv and zgv are picture viewing utilities with a thumbnail based file
selector.

Affected packages
================
    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  media-gfx/xzgv      < 0.8-r2                            >= 0.8-r2
  2  media-gfx/zgv         < 5.8                                >= 5.8
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
==========
Andrea Barisani of Gentoo Linux discovered xzgv and zgv allocate
insufficient memory when rendering images with more than 3 output
components, such as images using the YCCK or CMYK colour space. When
xzgv or zgv attempt to render the image, data from the image overruns a
heap allocated buffer.

Impact
=====
An attacker may be able to construct a malicious image that executes
arbitrary code with the permissions of the xzgv or zgv user when
attempting to render the image.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All xzgv users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/xzgv-0.8-r2"

All zgv users should also upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/zgv-5.8"

References
=========
  [ 1 ] CVE-2006-1060
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1060 

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

http://security.gentoo.org/glsa/glsa-200604-10.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/2.0 

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