Important: libvorbis security update

Updated libvorbis packages that fix various security issues are now
available for Red Hat Enterprise Linux 2.1.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

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, CVE-2008-2009)

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.

このアップデートを適用する前に、ご使用のシステムに関係するリリース済みのエラータ/Errataがすべて適用されていることを確認してください。

このアップデートは、Red Hat Networkを通じて入手できます。

440700 - CVE-2008-1419 vorbis: zero-dim codebooks can cause crash, infinite loop or heap overflow
440706 - CVE-2008-1420 vorbis: integer overflow in partvals computation
440709 - CVE-2008-1423 vorbis: integer oveflow caused by huge codebooks
444443 - CVE-2008-2009 vorbis: insufficient validation of Huffman tree causing memory corruption in _make_decode_tree()

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1419
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1420
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1423
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2009
http://www.redhat.com/security/updates/classification/#important