GD: Integer overflow

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.

Workaround

There is no known workaround at this time.

Resolution

All GD users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-libs/gd-2.0.32"