(RHSA-2008:0270) Important: libvorbis security update

The libvorbis packages contain runtime libraries for use in programs that
support Ogg Vorbis. Ogg Vorbis is a fully open, non-proprietary, patent-and
royalty-free, general-purpose compressed audio format.

Will Drewry of the Google Security Team reported several flaws in the way
libvorbis processed audio data. An attacker could create a carefully
crafted OGG audio file in such a way that it could cause an application
linked with libvorbis to crash, or execute arbitrary code when it was
opened. (CVE-2008-1419, CVE-2008-1420, CVE-2008-1423)

Moreover, additional OGG file sanity-checks have been added to prevent
possible exploitation of similar issues in the future.

Users of libvorbis are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues.