CamlImages: User-assisted execution of arbitrary code

Background

CamlImages is an image processing library for Objective Caml.

Description

Tielei Wang reported multiple integer overflows, possibly leading to heap-based buffer overflows in the (1) read_png_file() and read_png_file_as_rgb24() functions, when processing a PNG image (CVE-2009-2295) and (2) gifread.c and jpegread.c files when processing GIF or JPEG images (CVE-2009-2660).

Other integer overflows were also found in tiffread.c (CVE-2009-3296).

Impact

A remote attacker could entice a user to open a specially crafted, overly large PNG, GIF, TIFF, or JPEG image using an application that uses the CamlImages library, possibly resulting in the execution of arbitrary code with the privileges of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All CamlImages users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose =dev-ml/camlimages-3.0.2