Bug 1331464 (CVE-2016-1550)

Summary:	CVE-2016-1550 ntp: libntp message digest disclosure
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:	anemec, 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:	A flaw was found in the way NTP's libntp performed message authentication. An attacker able to observe the timing of the comparison function used in packet authentication could potentially use this flaw to recover the message digest.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-05-31 08:23:27 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, 1356969
Bug Blocks:	1331437

Description Martin Prpič 2016-04-28 14:52:05 UTC

The follwing flaw was found in NTP:

An exploitable vulnerability exists in the message authentication functionality of Network Time Protocol libntp. An attacker can send a series of crafted messages to attempt to recover the message digest key.

Upstream bugs:

http://support.ntp.org/bin/view/Main/NtpBug2879

External References:

http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
http://www.talosintel.com/reports/TALOS-2016-0084/

Comment 1 Martin Prpič 2016-05-02 11:37:49 UTC

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1332160]

Comment 3 Fedora Update System 2016-05-07 11:42:22 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 17:58:46 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 07:21:56 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 08:12:57 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 07:43:51 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