OptiPNG: User-assisted execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200903-12 / optipng
Release Date	March 09, 2009
Latest Revision	March 09, 2009: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-gfx/optipng	< 0.6.2-r1	>= 0.6.2-r1	All supported architectures

Related bugreports: #260265

Synopsis

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

2. Impact Information

Background

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

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All OptiPNG users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.6.2-r1"

4. References

CVE-2009-0749

Page updated March 09, 2009

Summary: This is a Gentoo Linux Security Advisory

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