RHEL 6 / 7 : ntp (RHSA-2016:0063)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

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.

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.

See also :

https://www.redhat.com/security/data/cve/CVE-2015-8138.html
http://rhn.redhat.com/errata/RHSA-2016-0063.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 4.1
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 88172 ()

Bugtraq ID:

CVE ID: CVE-2015-8138

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