Bug 1331468 – CVE-2016-2518 ntp: out-of-bounds references on crafted packet

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Bug 1331468 - (CVE-2016-2518) CVE-2016-2518 ntp: out-of-bounds references on crafted packet

Summary:	CVE-2016-2518 ntp: out-of-bounds references on crafted packet

Status:	CLOSED ERRATA

Aliases:	CVE-2016-2518

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20160426,reported=2...
Keywords:	Security

Depends On:	1332160 1332478 1332479 1332480 1332481 1356970
Blocks:	1331437
	Show dependency tree / graph

Reported:	2016-04-28 10:53 EDT by Martin Prpič
Modified:	2016-08-03 03:43 EDT (History)
CC List:	6 users (show)

See Also:
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 04:23:39 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Knowledge Base (Solution)	2300641	None	None	None	2016-05-05 21:29 EDT
Red Hat Product Errata	RHSA-2016:1141	normal	SHIPPED_LIVE	Moderate: ntp security update	2016-05-31 08:11:54 EDT
Red Hat Product Errata	RHSA-2016:1552	normal	SHIPPED_LIVE	Moderate: ntp security update	2016-08-03 07:43:21 EDT

Groups: None (edit)

Description Martin Prpič 2016-04-28 10:53:34 EDT

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 07:37:44 EDT

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1332160]

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

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 13:58:41 EDT

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 03:21:51 EDT

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 04:13:03 EDT

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 03:43:57 EDT

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

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