GLSA 200812-19: PowerDNS: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	PowerDNS: Multiple vulnerabilities
Date:	12/19/2008
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	Architecture(s)
net-dns/pdns	< 2.9.21.2	>= 2.9.21.2	All supported architectures

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

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 security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.