PowerDNS before 2.9.18, when allowing recursion to a restricted range of IP addresses, does not properly handle questions from clients that are denied recursion, which could cause a "blank out" of answers to those clients that are allowed to use recursion.
http://doc.powerdns.com/changelog.html#CHANGELOG-2-9-18
http://marc.info/?l=bugtraq&m=112155941310297&w=2
http://securitytracker.com/id?1014504
http://www.novell.com/linux/security/advisories/2005_19_sr.html
Source: MITRE
Published: 2005-07-19
Updated: 2016-10-18
Type: NVD-CWE-Other
Base Score: 2.1
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 3.9
Severity: LOW