full-disclosure - [ GLSA 200607-06 ] libpng: Buffer overflow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <44BE63D4.7000503@gentoo.org>
Date: Wed, 19 Jul 2006 18:54:44 +0200
From: Thierry Carrez <koon@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200607-06 ] libpng: Buffer overflow

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200607-06
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: libpng: Buffer overflow
      Date: July 19, 2006
      Bugs: #138433, #138672
        ID: 200607-06

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A buffer overflow has been found in the libpng library that could lead
to the execution of arbitrary code.

Background
==========

libpng is an open, extensible image format library, with lossless
compression.

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

    -------------------------------------------------------------------
     Package                  /  Vulnerable  /              Unaffected
    -------------------------------------------------------------------
  1  libpng                       < 1.2.12                   >= 1.2.12
  2  emul-linux-x86-baselibs       < 2.5.1                    >= 2.5.1
    -------------------------------------------------------------------
     # Package 2 [app-emulation/emul-linux-x86-baselibs] only applies
       to AMD64 users.

     NOTE: Any packages listed without architecture tags apply to all
           architectures...
    -------------------------------------------------------------------
     2 affected packages
    -------------------------------------------------------------------

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

In pngrutil.c, the function png_decompress_chunk() allocates
insufficient space for an error message, potentially overwriting stack
data, leading to a buffer overflow.

Impact
======

By enticing a user to load a maliciously crafted PNG image, an attacker
could execute arbitrary code with the rights of the user, or crash the
application using the libpng library, such as the
emul-linux-x86-baselibs.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libpng users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.12"

All AMD64 emul-linux-x86-baselibs users should also upgrade to the
latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=app-emulation/emul-linux-x86-baselibs-2.5.1"

References
==========

  [ 1 ] libpng Changelog

http://heanet.dl.sourceforge.net/sourceforge/libpng/libpng-1.2.12-README.txt
  [ 2 ] CVE-2006-3334
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3334

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

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

  http://security.gentoo.org/glsa/glsa-200607-06.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@...too.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

Download attachment "signature.asc" of type "application/pgp-signature" (255 bytes)

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/