gThumb: Arbitrary code execution

Background

gThumb is an image viewer and browser for GNOME.

Description

A heap-based buffer overflow in gThumb’s _cairo_image_surface_create_from_jpeg() function, located in extensions/cairo_io/cairo-image-surface-jpeg.c was discovered.

Impact

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

Workaround

There is no known workaround at this time.

Resolution

All gThumb users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-gfx/gthumb-3.10.0"