RHSA-2012:1365 - Security Advisory

Topic

Updated bind packages that fix two security issues are now available for
Red Hat Enterprise Linux 4 Extended Life Cycle Support.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

Description

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 found in the way BIND handled resource records with a large
RDATA value. A malicious owner of a DNS domain could use this flaw to
create specially-crafted DNS resource records, that would cause a recursive
resolver or secondary server to exit unexpectedly with an assertion
failure. (CVE-2012-4244)

A flaw was found in the way BIND handled certain combinations of resource
records. A remote attacker could use this flaw to cause a recursive
resolver, or an authoritative server in certain configurations, to lockup.
(CVE-2012-5166)

Users of bind are advised to upgrade to these updated packages, which
correct these issues. After installing the update, the BIND daemon (named)
will be restarted automatically.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server - Extended Life Cycle Support 4 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 4 ia64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 4 i386

Fixes

• BZ - 856754 - CVE-2012-4244 bind: specially crafted resource record causes named to exit
• BZ - 864273 - CVE-2012-5166 bind: Specially crafted DNS data can cause a lockup in named

CVEs

• CVE-2012-4244
• CVE-2012-5166

References

• https://access.redhat.com/security/updates/classification/#important
• http://www.isc.org/software/bind/advisories/cve-2012-4244
• http://www.isc.org/software/bind/advisories/cve-2012-5166