Bug 658977 (CVE-2010-3614)

Summary:	CVE-2010-3614 bind: key algorithm rollover may mark secure answers as insecure
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	atkac, mcermak
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:	2010-12-13 20:06:25 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:	658987, 658990, 659266, 659267, 659268, 659269, 659270
Bug Blocks:

Description Vincent Danen 2010-12-01 18:16:16 UTC

A flaw was found in how named (acting as a DNSSEC validating resolver) could incorrectly mark zone data as insecure when the zone being queried is undergoing a key algorithm rollover [1].

The advisory states:

"named, acting as a DNSSEC validator, was determining if an NS RRset is insecure based on a value that could mean either that the RRset is actually insecure or that there wasn't a matching key for the RRSIG in the DNSKEY RRset when resuming from validating the DNSKEY RRset.  This can happen when in the middle of a DNSKEY algorithm rollover, when two different algorithms were used to sign a zone but only the new set of keys are in the zone DNSKEY RRset."

The upstream advisory [2] notes that this affects all versions of BIND9, although they only specifically point out 9.4, 9.6, and 9.7; the flaw is corrected in 9.4-ESV-R4, 9.6.2-P3, and 9.7.2-P3.  Upstream has also indicated this issue is of low severity.

[1] http://www.isc.org/announcement/guidance-regarding-dec-1st-2010-security-advisories
[2] http://www.isc.org/software/bind/advisories/cve-2010-3614

Comment 1 Vincent Danen 2010-12-01 18:57:41 UTC

Created bind tracking bugs for this issue

Affects: fedora-14 [bug 658987]

Comment 2 Vincent Danen 2010-12-01 18:58:19 UTC

Created bind tracking bugs for this issue

Affects: fedora-13 [bug 658990]

Comment 7 Tomas Hoger 2010-12-07 11:06:32 UTC

This issue is planned to be addressed in bind packages in Red Hat Enterprise Linux 5 and 6.  There's no plan to address this low-impact flaw in Red Hat Enterprise Linux 4, where bind does not implement support for currently used DNSSEC protocol version.

Comment 9 errata-xmlrpc 2010-12-13 17:48:47 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2010:0975 https://rhn.redhat.com/errata/RHSA-2010-0975.html

Comment 10 errata-xmlrpc 2010-12-13 17:54:42 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0976 https://rhn.redhat.com/errata/RHSA-2010-0976.html

Comment 11 Vincent Danen 2010-12-18 00:07:31 UTC

Statement:

The Red Hat Security Response Team has rated this issue as having low security impact.  Because the version of bind in Red Hat Enterprise Linux 4 does not implement support for the currently-used DNSSEC protocol version, there is no plan to address this flaw there.  It has been addressed in Red Hat Enterprise Linux 5 (via RHSA-2010:0975) and Red Hat Enterprise Linux 6 (via RHSA-2010:0976).