Bug 1494005 (CVE-2017-14339)

Summary:	CVE-2017-14339 yadifa: Infinite loop due to insufficient checks in the DNS packet parser
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	denis
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	yadifa 2.2.6	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-03-10 00:32:20 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:	1494006, 1494007
Bug Blocks:

Description Andrej Nemec 2017-09-21 10:06:08 UTC

The DNS packet parser in YADIFA before 2.2.6 does not check for the presence of infinite pointer loops, and thus it is possible to force it to enter an infinite loop. This can cause high CPU usage and makes the server unresponsive.

References:

https://github.com/yadifa/yadifa/blob/v2.2.6/ChangeLog
https://www.tarlogic.com/blog/fuzzing-yadifa-dns/

Comment 1 Andrej Nemec 2017-09-21 10:06:26 UTC

Created yadifa tracking bugs for this issue:

Affects: epel-all [bug 1494006]
Affects: fedora-all [bug 1494007]

Comment 2 Denis Fateyev 2017-11-25 17:11:14 UTC

Already fixed in updates