GD: User-assisted execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201006-16 / gd
Release Date	June 03, 2010
Latest Revision	June 03, 2010: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/gd	< 2.0.35-r1	>= 2.0.35-r1	All supported architectures

Related bugreports: #292130

Synopsis

The GD library is prone to a buffer overflow vulnerability.

2. Impact Information

Background

GD is a graphic library for fast image creation.

Description

Tomas Hoger reported that the _gdGetColors() function in gd_gd.c does not properly verify the colorsTotal struct member, possibly leading to a buffer overflow.

Impact

A remote attacker could entice a user to open a specially crafted image file with a program using the GD library, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the application, or a Denial of Service condition.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All GD users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/gd-2.0.35-r1"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since November 21, 2009. It is likely that your system is already no longer affected by this issue.

4. References

CVE-2009-3546

Page updated June 03, 2010

Summary: This is a Gentoo Linux Security Advisory

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