1. Gentoo Linux Security Advisory
| 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 | < 2.9.21.2 | >= 2.9.21.2 | 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.
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:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/pdns-2.9.21.2" |