Bug 1353573 (CVE-2016-6171)

Summary:	CVE-2016-6171 knot: Improper restriction of zone size limit
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jv+fedora, pwouters
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-07 13:27:53 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:	1353574, 1353575
Bug Blocks:

Description Adam Mariš 2016-07-07 13:18:32 UTC

It was found that knot does not implement reasonable restrictions for zone sizes. This allows an explicitly configured primary DNS server for a zone to crash a secondary DNS server, affecting service of other zones hosted on the same secondary server.

CVE request:

http://seclists.org/oss-sec/2016/q3/19

Upstream bug:

https://gitlab.labs.nic.cz/labs/knot/merge_requests/541

Comment 1 Adam Mariš 2016-07-07 13:18:53 UTC

Created knot tracking bugs for this issue:

Affects: fedora-all [bug 1353574]
Affects: epel-all [bug 1353575]

Comment 2 Fedora Update System 2016-08-19 19:53:16 UTC

knot-2.3.0-2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-08-19 22:20:51 UTC

knot-2.3.0-2.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-08-27 10:40:09 UTC

knot-2.3.0-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.