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PowerDNS: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200812-19 / pdns
Release Date December 19, 2008
Latest Revision December 19, 2008: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-dns/pdns < >= All supported architectures

Related bugreports: #234032, #247079


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

2.  Impact Information


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


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).


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.

3.  Resolution Information


There is no known workaround at this time.


All PowerDNS users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4.  References


Page updated December 19, 2008

Summary: This is a Gentoo Linux Security Advisory

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