bind97 security update

CentOS Errata and Security Advisory CESA-2011:1459

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain
Name System (DNS) protocols. BIND includes a DNS server (named); a resolver
library (routines for applications to use when interfacing with DNS); and
tools for verifying that the DNS server is operating correctly.

A flaw was discovered in the way BIND handled certain DNS queries, which
caused it to cache an invalid record. A remote attacker could use this
flaw to send repeated queries for this invalid record, causing the
resolvers to exit unexpectedly due to a failed assertion. (CVE-2011-4313)

Users of bind97 are advised to upgrade to these updated packages, which
resolve this issue. After installing the update, the BIND daemon (named)
will be restarted automatically.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2011-November/080371.html
https://lists.centos.org/pipermail/centos-announce/2011-November/080372.html

Affected packages:
bind97
bind97-chroot
bind97-devel
bind97-libs
bind97-utils

Upstream details at:
https://access.redhat.com/errata/RHSA-2011:1459