libvpx: User-assisted execution of arbitrary code

Background

libvpx is the VP8 codec SDK used to encode and decode video streams, typically within a WebM format media file.

Description

Multiple vulnerabilities have been discovered in libvpx. Please review the CVE identifiers referenced below for details.

Impact

A remote attacker could entice a user to open a specially crafted media file, possibly resulting in the execution of arbitrary code with the privileges of the user running the application, or a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All libvpx 1.7.x users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-libs/libvpx-1.7.0-r1"

All libvpx 1.8.x users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=media-libs/libvpx-1.8.1"