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Gentoo Linux Security Advisory                           GLSA 200812-19
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                                              https://security.gentoo.org/
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    Severity: Normal
       Title: PowerDNS: Multiple vulnerabilities
        Date: December 19, 2008
        Bugs: #234032, #247079
          ID: 200812-19

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Synopsis
=======
Two vulnerabilities have been discovered in PowerDNS, possibly leading
to a Denial of Service and easing cache poisoning attacks.

Background
=========
The PowerDNS Nameserver is an authoritative-only nameserver which uses
a flexible backend architecture.

Affected packages
================
      -------------------------------------------------------------------
       Package       /  Vulnerable  /                         Unaffected
      -------------------------------------------------------------------
    1  net-dns/pdns     < 2.9.21.2                           >= 2.9.21.2

Description
==========
Daniel Drown reported an error when receiving a HINFO CH query
(CVE-2008-5277). Brian J. Dowling of Simplicity Communications
discovered a previously unknown security implication of the PowerDNS
behavior to not respond to certain queries it considers malformed
(CVE-2008-3337).

Impact
=====
A remote attacker could send specially crafted queries to cause a
Denial of Service. The second vulnerability in itself does not pose a
security risk to PowerDNS Nameserver. However, not answering a query
for an invalid DNS record within a valid domain allows for a larger
spoofing window on third-party nameservers for domains being hosted by
PowerDNS Nameserver itself.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All PowerDNS users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-dns/pdns-2.9.21.2"

References
=========
    [ 1 ] CVE-2008-3337
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3337
    [ 2 ] CVE-2008-5277
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5277

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

    https://security.gentoo.org/glsa/200812-19

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 2008 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.

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