[ GLSA 200903-14 ] BIND: Incorrect signature verification

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200903-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: BIND: Incorrect signature verification
      Date: March 09, 2009
      Bugs: #254134, #257949
        ID: 200903-14

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Synopsis
========

Incomplete verification of RSA and DSA certificates might lead to
spoofed records authenticated using DNSSEC.

Background
==========

ISC BIND is the Internet Systems Consortium implementation of the
Domain Name System (DNS) protocol.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-dns/bind     < 9.4.3_p1                           >= 9.4.3_p1

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

BIND does not properly check the return value from the OpenSSL
functions to verify DSA (CVE-2009-0025) and RSA (CVE-2009-0265)
certificates.

Impact
======

A remote attacker could bypass validation of the certificate chain to
spoof DNSSEC-authenticated records.

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-9.4.3_p1"

References
==========

  [ 1 ] CVE-2009-0025
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0025
  [ 2 ] CVE-2009-0265
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0265

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

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

  http://security.gentoo.org/glsa/glsa-200903-14.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
http://bugs.gentoo.org.

License
=======

Copyright 2009 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

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