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Red Hat Enterprise Linux 6 and 7 RHSA-2016-0063 Important NTP Update

red hat
Calendar Grey January 25, 2016
Scroller Redhat
Keep updated about the crucial NTP vulnerability patch for Red Hat Linux to mitigate essential risks of remote assaults efficiently.
Updated ntp packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7

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

Summary

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.

Topics%20covered

Topics Covered

security advisory red hat remote attack important patch update ntp arbitrary offset

References

https://access.redhat.com/security/cve/CVE-2015-8138 https://access.redhat.com/security/updates/classification#important

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:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:0063-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:0063.html
Issue date: 2016-01-25

Topic

Updated ntp packages that fix one security issue are now available for RedHat Enterprise Linux 6 and 7.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory red hat remote attack important patch update ntp arbitrary offset

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

Bugs Fixed

1299442 - CVE-2015-8138 ntp: missing check for zero originate timestamp

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