PowerDNS: information disclosure

Background

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

Description

It was discovered that PowerDNS did not properly handle certain unknown records.

Impact

An authorized attacker with the ability to insert crafted records into a zone might be able to leak the content of uninitialized memory. Crafted records cannot be inserted via AXFR.

Workaround

Do not take zone data from untrusted users.

Resolution

All PowerDNS users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-dns/pdns-4.3.1"