GLSA 200903-14 BIND: Incorrect signature verification
Posted on: 03/09/2009 02:50 PM

A new security update has been released for Gentoo Linux - BIND: Incorrect signature verification. Here the announcement:

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 lt; 9.4.3_p1 gt;= 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 "gt;=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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