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PowerDNS 2.9.18 fixes two security issues affecting users of LDAP backend or limited recursion
From: bert.hubert () netherlabs nl
Date: 16 Jul 2005 11:54:37 -0000

PowerDNS 2.9.18 fixes two bugs with security implications, which only apply to installations running on the LDAP 
backend, or installations providing recursion to a limited range of IP addresses. If any of these apply to you, an 
upgrade is highly advised.

Version 2.9.18 release notes are on: http://doc.powerdns.com/changelog.html#CHANGELOG-2-9-18
Version 2.9.18 is available on:
http://www.powerdns.com/downloads/
Wiki, source, bugtracker: http://wiki.powerdns.com/
Security page: http://doc.powerdns.com/security-policy.html

Details:
    * The LDAP backend did not properly escape all queries, allowing it to fail and not answer questions. We have not 
investigated further risks involved, but we advise LDAP users to update as quickly as possible (Norbert Sendetzky, Jan 
de Groot)

    * Questions from clients denied recursion could blank out answers to clients who are allowed recursion services, 
temporarily. Reported by Wilco Baan. This would've made it possible for outsiders to blank out a domain temporarily to 
your users. Luckily PowerDNS would send out SERVFAIL or Refused, and not a denial of a domain's existence. 

Thanks for your attention.

Bert Hubert
http://www.netherlabs.nl
http://www.powerdns.com
http://ds9a.nl/


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