Bug 1331468 (CVE-2016-2518)

Summary:	CVE-2016-2518 ntp: out-of-bounds references on crafted packet
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	apmukher, jaeshin, mdshaikh, mlichvar, sardella, slawomir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ntp 4.2.8p7	Doc Type:	Bug Fix
Doc Text:	An out-of-bounds access flaw was found in the way ntpd processed certain packets. An authenticated attacker could use a crafted packet to create a peer association with hmode of 7 and larger, which could potentially (although highly unlikely) cause ntpd to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-05-31 08:23:39 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:	1332160, 1332478, 1332479, 1332480, 1332481, 1356970
Bug Blocks:	1331437

Description Martin Prpič 2016-04-28 14:53:34 UTC

The following flaw was found in ntpd:

Using a crafted packet to create a peer association with hmode > 7 causes the MATCH_ASSOC() lookup to make an out-of-bounds reference.

Upstream bugs:

http://support.ntp.org/bin/view/Main/NtpBug3009

External References:

http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security

Comment 1 Martin Prpič 2016-05-02 11:37:44 UTC

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1332160]

Comment 3 Fedora Update System 2016-05-07 11:42:17 UTC

ntp-4.2.6p5-40.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-05-10 17:58:41 UTC

ntp-4.2.6p5-40.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-05-12 07:21:51 UTC

ntp-4.2.6p5-40.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 errata-xmlrpc 2016-05-31 08:13:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6

Via RHSA-2016:1141 https://access.redhat.com/errata/RHSA-2016:1141

Comment 8 errata-xmlrpc 2016-08-03 07:43:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.7 Extended Update Support

Via RHSA-2016:1552 https://rhn.redhat.com/errata/RHSA-2016-1552.html