Gentoo Linux Security Advisory GLSA 200812-19

                                          http://security.gentoo.org/

Severity: Normal
   Title: PowerDNS: Multiple vulnerabilities
    Date: December 19, 2008
    Bugs: #234032, #247079
      ID: 200812-19

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:

http://security.gentoo.org/glsa/glsa-200812-19.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
[email protected] or alternatively, you may file a bug at
http://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.

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