Issued:
2010-01-20
Updated:
2010-01-20

RHSA-2010:0062 - Moderate: bind security update

Synopsis

Moderate: bind security update

Type/Severity

Security Advisory Moderate

Topic

Updated bind packages that fix two security issues are now available for Red Hat Enterprise Linux 5.

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

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 BIND DNSSEC NSEC/NSEC3 validation code. If BIND was running as a DNSSEC-validating resolver, it could incorrectly cache NXDOMAIN responses, as if they were valid, for records proven by NSEC or NSEC3 to exist. A remote attacker could use this flaw to cause a BIND server to return the bogus, cached NXDOMAIN responses for valid records and prevent users from retrieving those records (denial of service). (CVE-2010-0097)

The original fix for CVE-2009-4022 was found to be incomplete. BIND was incorrectly caching certain responses without performing proper DNSSEC validation. CNAME and DNAME records could be cached, without proper DNSSEC validation, when received from processing recursive client queries that requested DNSSEC records but indicated that checking should be disabled. A remote attacker could use this flaw to bypass the DNSSEC validation check and perform a cache poisoning attack if the target BIND server was receiving such client queries. (CVE-2010-0290)

All BIND users are advised to upgrade to these updated packages, which contain a backported patch to resolve these issues. After installing the update, the BIND daemon (named) will be restarted automatically.

Solution

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

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.4ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.4s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • bind-devel-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.s390.rpm
  • bind-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-sdb-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-chroot-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-sdb-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.s390.rpm
  • bind-chroot-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.ppc64.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-chroot-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-sdb-9.3.6-4.P1.el5_4.2.ppc.rpm
  • caching-nameserver-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-utils-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-9.3.6-4.P1.el5_4.2.src.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.ppc64.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.s390.rpm
  • bind-utils-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-sdb-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-libs-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-chroot-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.i386.rpm
  • caching-nameserver-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-sdb-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • caching-nameserver-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.ppc64.rpm
  • bind-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-utils-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.s390x.rpm
  • bind-utils-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-chroot-9.3.6-4.P1.el5_4.2.s390x.rpm
  • caching-nameserver-9.3.6-4.P1.el5_4.2.ppc.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-devel-9.3.6-4.P1.el5_4.2.ia64.rpm
  • bind-libbind-devel-9.3.6-4.P1.el5_4.2.x86_64.rpm
  • bind-9.3.6-4.P1.el5_4.2.i386.rpm
  • caching-nameserver-9.3.6-4.P1.el5_4.2.i386.rpm
  • bind-utils-9.3.6-4.P1.el5_4.2.s390x.rpm

Fixes

CVEs

References

Additional information