From: Raphael Marichez (falcogentoo.org)
Date: Sat Aug 11 2007 - 16:32:22 CDT

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Gentoo Linux Security Advisory GLSA 200708-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Net::DNS: Multiple vulnerabilities
      Date: August 11, 2007
      Bugs: #184029
        ID: 200708-06

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Synopsis
========

Multiple vulnerabilities have been discovered in the Net::DNS Perl
module, allowing for a Denial of Service and a cache poisoning attack.

Background
==========

Net::DNS is a Perl implementation of a DNS resolver.

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

    -------------------------------------------------------------------
     Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
  1 dev-perl/Net-DNS < 0.60 >= 0.60

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

hjp discovered an error when handling DNS query IDs which make them
partially predictable. Steffen Ullrich discovered an error in the
dn_expand() function which could lead to an endless loop.

Impact
======

A remote attacker could send a specially crafted DNS request to the
server which could result in a Denial of Service with an infinite
recursion, or perform a cache poisoning attack.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Net::DNS users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-perl/Net-DNS-0.60"

References
==========

  [ 1 ] CVE-2007-3377
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3377
  [ 2 ] CVE-2007-3409
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3409

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

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

  http://security.gentoo.org/glsa/glsa-200708-06.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
securitygentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 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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