Gentoo: 201209-04 BIND: Multiple vulnerabilities
Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities have been found in BIND, the worst of which may allow remote Denial of Service.
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Gentoo Linux Security Advisory                           GLSA 201209-04
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: BIND: Multiple vulnerabilities
     Date: September 24, 2012
     Bugs: #402661, #419637, #427966, #434876
       ID: 201209-04

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Synopsis
========

Multiple vulnerabilities have been found in BIND, the worst of which
may allow remote Denial of Service.

Background
==========

BIND is the Berkeley Internet Name Domain Server.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-dns/bind                < 9.9.1_p3               >= 9.9.1_p3

Description
===========

Multiple vulnerabilities have been discovered in BIND:

* Domain names are not properly revoked due to an error in the cache
  update policy (CVE-2012-1033).
* BIND accepts records with zero-length RDATA fields (CVE-2012-1667).
* An assertion failure from the failing-query cache could occur when
  DNSSEC validation is enabled (CVE-2012-3817).
* A memory leak may occur under high TCP query loads (CVE-2012-3868).
* An assertion error can occur when a query is performed for a record
  with RDATA greater than 65535 bytes (CVE-2012-4244).

Impact
======

A remote attacker may be able to cause a Denial of Service condition or
keep domain names resolvable after it has been deleted from
registration.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All BIND users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-dns/bind-9.9.1_p3"

References
==========

[ 1 ] CVE-2012-1033
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1033
[ 2 ] CVE-2012-1667
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1667
[ 3 ] CVE-2012-3817
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3817
[ 4 ] CVE-2012-3868
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3868
[ 5 ] CVE-2012-4244
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4244

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 http://security.gentoo.org/glsa/glsa-201209-04.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2012 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5