Updated bind packages fix buffer overflow in resolver library

Updated BIND packages that fix a number of vulnerabilities are now
available for Red Hat Linux on IBM iSeries and pSeries systems.

ISC BIND (Berkeley Internet Name Domain) is an implementation of the DNS
(Domain Name System) protocols. BIND includes a DNS server (named),
which resolves host names to IP addresses; a resolver library
(routines for applications to use when interfacing with DNS); and
various tools.

A buffer overflow vulnerability exists in multiple implementations of the
DNS resolver libraries. Applications that utilize vulnerable DNS resolver
libraries may be affected. A remote attacker who is able to send malicious
DNS responses could potentially exploit this vulnerability to execute
arbitrary code or cause a denial of service on a vulnerable system.

Red Hat Linux does not ship with any applications or libraries that link
against the BIND resolver libraries; however, third party code may be affected.

Versions of BIND 9 prior to 9.2.1 have a bug that causes certain requests
to the BIND name server (named) to fail an internal consistency check,
causing the name server to stop responding to requests. This can be used
by a remote attacker to cause a denial of service (DOS) attack against name
servers.

The updated bind packages included in this errata contain Bind 9.2.1 with
the addition of backported patches and is not vulnerable to these issues.

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0400
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0651
http://www.kb.cert.org/vuls/id/803539
http://online.securityfocus.com/bid/5100

bind, buffer, consistancy, dos, libbind, library, overflow, resolver, srv