[ GLSA 200903-12 ] OptiPNG: User-assisted execution of arbitrary code

2009-03-0900:00:00

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Gentoo Linux Security Advisory GLSA 200903-12

                                        http://security.gentoo.org/

Severity: Normal
Title: OptiPNG: User-assisted execution of arbitrary code
Date: March 09, 2009
Bugs: #260265
ID: 200903-12

Synopsis

A vulnerability in OptiPNG might result in user-assisted execution of
arbitrary code.

Background

OptiPNG is a PNG optimizer that recompresses image files to a smaller
size, without losing any information.

Affected packages

-------------------------------------------------------------------
 Package            /  Vulnerable  /                    Unaffected
-------------------------------------------------------------------

1 media-gfx/optipng < 0.6.2-r1 >= 0.6.2-r1

Description

Roy Tam reported a use-after-free vulnerability in the
GIFReadNextExtension() function in lib/pngxtern/gif/gifread.c leading
to a memory corruption when reading a GIF image.

Impact

A remote attacker could entice a user to process a specially crafted
GIF image, possibly resulting in the execution of arbitrary code with
the privileges of the user running the application, or a Denial of
Service.

Workaround

There is no known workaround at this time.

Resolution

All OptiPNG users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=media-gfx/optipng-0.6.2-r1&quot;

References

[ 1 ] CVE-2009-0749
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0749

Availability

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

http://security.gentoo.org/glsa/glsa-200903-12.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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.