Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2016.0177
Important: ntp security update
27 January 2016
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: ntp
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-8138
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2016-0063.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running ntp check for an updated version of the software for their
operating system.
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Red Hat Security Advisory
Synopsis: Important: ntp security update
Advisory ID: RHSA-2016:0063-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0063.html
Issue date: 2016-01-25
CVE Names: CVE-2015-8138
=====================================================================
1. Summary:
Updated ntp packages that fix one security issue are now available for Red
Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64
3. Description:
The Network Time Protocol (NTP) is used to synchronize a computer's time
with a referenced time source.
It was discovered that ntpd as a client did not correctly check the
originate timestamp in received packets. A remote attacker could use this
flaw to send a crafted packet to an ntpd client that would effectively
disable synchronization with the server, or push arbitrary offset/delay
measurements to modify the time on the client. (CVE-2015-8138)
All ntp users are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue. After installing the
update, the ntpd daemon will restart automatically.
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1299442 - CVE-2015-8138 ntp: missing check for zero originate timestamp
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
ntp-4.2.6p5-5.el6_7.4.src.rpm
i386:
ntp-4.2.6p5-5.el6_7.4.i686.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntpdate-4.2.6p5-5.el6_7.4.i686.rpm
x86_64:
ntp-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm
noarch:
ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
ntp-4.2.6p5-5.el6_7.4.src.rpm
x86_64:
ntp-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
noarch:
ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ntp-4.2.6p5-5.el6_7.4.src.rpm
i386:
ntp-4.2.6p5-5.el6_7.4.i686.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntpdate-4.2.6p5-5.el6_7.4.i686.rpm
ppc64:
ntp-4.2.6p5-5.el6_7.4.ppc64.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.ppc64.rpm
ntpdate-4.2.6p5-5.el6_7.4.ppc64.rpm
s390x:
ntp-4.2.6p5-5.el6_7.4.s390x.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.s390x.rpm
ntpdate-4.2.6p5-5.el6_7.4.s390x.rpm
x86_64:
ntp-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
i386:
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm
noarch:
ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm
ppc64:
ntp-debuginfo-4.2.6p5-5.el6_7.4.ppc64.rpm
ntp-perl-4.2.6p5-5.el6_7.4.ppc64.rpm
s390x:
ntp-debuginfo-4.2.6p5-5.el6_7.4.s390x.rpm
ntp-perl-4.2.6p5-5.el6_7.4.s390x.rpm
x86_64:
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ntp-4.2.6p5-5.el6_7.4.src.rpm
i386:
ntp-4.2.6p5-5.el6_7.4.i686.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntpdate-4.2.6p5-5.el6_7.4.i686.rpm
x86_64:
ntp-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
i386:
ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm
ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm
noarch:
ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm
ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm
Red Hat Enterprise Linux Client (v. 7):
Source:
ntp-4.2.6p5-22.el7_2.1.src.rpm
x86_64:
ntp-4.2.6p5-22.el7_2.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm
ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
sntp-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
ntp-4.2.6p5-22.el7_2.1.src.rpm
x86_64:
ntp-4.2.6p5-22.el7_2.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm
ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
sntp-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
ntp-4.2.6p5-22.el7_2.1.src.rpm
ppc64:
ntp-4.2.6p5-22.el7_2.1.ppc64.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64.rpm
ntpdate-4.2.6p5-22.el7_2.1.ppc64.rpm
ppc64le:
ntp-4.2.6p5-22.el7_2.1.ppc64le.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64le.rpm
ntpdate-4.2.6p5-22.el7_2.1.ppc64le.rpm
s390x:
ntp-4.2.6p5-22.el7_2.1.s390x.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.s390x.rpm
ntpdate-4.2.6p5-22.el7_2.1.s390x.rpm
x86_64:
ntp-4.2.6p5-22.el7_2.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm
ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm
ppc64:
ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64.rpm
sntp-4.2.6p5-22.el7_2.1.ppc64.rpm
ppc64le:
ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64le.rpm
sntp-4.2.6p5-22.el7_2.1.ppc64le.rpm
s390x:
ntp-debuginfo-4.2.6p5-22.el7_2.1.s390x.rpm
sntp-4.2.6p5-22.el7_2.1.s390x.rpm
x86_64:
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
sntp-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
ntp-4.2.6p5-22.el7_2.1.src.rpm
x86_64:
ntp-4.2.6p5-22.el7_2.1.x86_64.rpm
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm
ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm
sntp-4.2.6p5-22.el7_2.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2015-8138
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2016 Red Hat, Inc.
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