Bug 440247 (CVE-2008-1637)

Summary:	CVE-2008-1637 pdns-recursor: perdictable query ids
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ruben
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-04-24 11:21:20 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	440248, 440249, 440250
Bug Blocks:

Description Tomas Hoger 2008-04-02 14:27:05 UTC

Amit Klein of Trusteer discovered and documented weakness in a way PowerDNS
Recursor generates DNS queries and transaction IDs used in DNS queries.  This
weakness can be used to predict transaction IDs used in a subsequent queries
after observing certain amount of consequent previous queries, leading to a high
possibility of performing a successful cache poisoning attack.

PowerDNS Recursor 3.1.5 was released to address this issue.

References:
http://www.trusteer.com/docs/powerdnsrecursor.html
http://doc.powerdns.com/powerdns-advisory-2008-01.html
http://mailman.powerdns.com/pipermail/pdns-users/2008-March/005279.html
http://www.securityfocus.com/archive/1/490330/30/

Comment 2 Tomas Hoger 2008-04-02 17:09:21 UTC

CVE-2008-1637 was assigned to this issue:

PowerDNS Recursor before 3.1.5 uses insufficient randomness to
calculate (1) TRXID values and (2) UDP source port numbers, which
makes it easier for remote attackers to poison a DNS cache, related to
(a) algorithmic deficiencies in rand and random functions in external
libraries, (b) use of a 32-bit seed value, and (c) choice of the time
of day as the sole seeding information.

Comment 3 Fedora Update System 2008-04-05 12:41:12 UTC

pdns-recursor-3.1.5-1.fc8 has been submitted as an update for Fedora 8

Comment 4 Fedora Update System 2008-04-05 12:42:52 UTC

pdns-recursor-3.1.5-1.fc7 has been submitted as an update for Fedora 7

Comment 5 Fedora Update System 2008-04-09 05:20:41 UTC

pdns-recursor-3.1.5-1.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2008-04-09 05:22:15 UTC

pdns-recursor-3.1.5-1.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Red Hat Product Security 2008-04-24 11:21:20 UTC

This issue was addressed in:

Fedora:
  https://admin.fedoraproject.org/updates/F7/FEDORA-2008-3010
  https://admin.fedoraproject.org/updates/F8/FEDORA-2008-3036