xzgv: Multiple overflows

Background

xzgv is a picture viewer for X, with a thumbnail-based file selector.

Description

Multiple overflows have been found in the image processing code of xzgv, including an integer overflow in the PRF parsing code (CAN-2004-0994).

Impact

An attacker could entice a user to open or browse a specially-crafted image file, potentially resulting in the execution of arbitrary code with the rights of the user running xzgv.

Workaround

There is no known workaround at this time.

Resolution

All xzgv users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-gfx/xzgv-0.8-r1"