Gentoo: Net:DNS: Multiple vulnerabilities
Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities have been discovered in the Net::DNS Perl module, allowing for a Denial of Service and a cache poisoning attack.
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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
security@gentoo.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