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full-disclosure-uk: [Full-disclosure] [ GLSA 200705-24 ] libpng:

[Full-disclosure] [ GLSA 200705-24 ] libpng: Denial of Service

From: Raphael Marichez <falco_at_nospam>
Date: Thu May 31 2007 - 18:12:58 GMT
To: gentoo-announce@gentoo.org

  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-24
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Severity: Normal Title: libpng: Denial of Service Date: May 31, 2007 Bugs: #178004 ID: 200705-24
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Synopsis


A vulnerability in libpng may allow a remote attacker to crash applications that handle untrusted images.

Background


libpng is a free ANSI C library used to process and manipulate PNG images.

Affected packages



Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libpng < 1.2.17 >= 1.2.17

Description


Mats Palmgren fixed an error in file pngrutil.c in which the trans[] array might be not allocated because of images with a bad tRNS chunk CRC value.

Impact


A remote attacker could craft an image that when processed or viewed by an application using libpng causes the application to terminate abnormally.

Workaround


There is no known workaround at this time.

Resolution


Please note that due to separate bugs in libpng 1.2.17, Gentoo does not provide libpng-1.2.17 but libpng-1.2.18. All libpng users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.18"

References


  [ 1 ] CVE-2007-2445
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445

Availability


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

  http://security.gentoo.org/glsa/glsa-200705-24.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 2007 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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