PowerDNS: Multiple vulnerabilities Two vulnerabilities have been discovered in PowerDNS, possibly leading to a Denial of Service and easing cache poisoning attacks. pdns 2008-12-19 2008-12-19 234032 247079 remote 2.9.21.2 2.9.21.2

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.

There is no known workaround at this time.

All PowerDNS users should upgrade to the latest version:

# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/pdns-2.9.21.2" CVE-2008-3337 CVE-2008-5277 p-y p-y jaervosz