GD: Integer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200411-08 / GD
Release Date	November 03, 2004
Latest Revision	November 03, 2004: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/gd	< 2.0.32	>= 2.0.32	All supported architectures

Related bugreports: #69070

Synopsis

The PNG image decoding routines in the GD library contain an integer overflow that may allow execution of arbitrary code with the rights of the program decoding a malicious PNG image.

2. Impact Information

Background

The GD graphics library is an open source library which allows programmers to easily generate PNG, JPEG, GIF and WBMP images from many different programming languages.

Description

infamous41md found an integer overflow in the memory allocation procedure of the GD routine that handles loading PNG image files.

Impact

A remote attacker could entice a user to load a carefully crafted PNG image file in a GD-powered application, or send a PNG image to a web application which uses GD PNG decoding functions. This could potentially lead to execution of arbitrary code with the rights of the program loading the image.

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-2.0.32"

4. References

Page updated November 03, 2004

Summary: This is a Gentoo Linux Security Advisory

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