Bug 1189406

Summary:	ntp: improper vallen validation in ntp_crypto.c
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	jrusnack, mlichvar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ntp 4.2.8p1	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-02-05 09:49:26 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:
Bug Blocks:	1189411

Description Martin Prpič 2015-02-05 09:11:14 UTC

It was found that several functions in NTP's ntp_crypto.c did not properly validate the vallen packet value. A remote attacker could use this flaw to cause an information leak or crash ntpd via a specially crafted vallen packet.

Upstream issue:

http://bugs.ntp.org/show_bug.cgi?id=2671

External References:

http://support.ntp.org/bin/view/Main/SecurityNotice#vallen_is_not_validated_in_sever

Comment 1 Martin Prpič 2015-02-05 09:21:35 UTC

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1189412]