Detections
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CentOS 6 / 7 : ntp (CESA-2016:0063)

medium Nessus Plugin ID 88147

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Synopsis

The remote CentOS 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.

Solution

Update the affected ntp packages.

See Also

http://www.nessus.org/u?7a7bd6cb

http://www.nessus.org/u?05b20906

Plugin Details

Severity: Medium

ID: 88147

File Name: centos_RHSA-2016-0063.nasl

Version: 2.13

Type: local

Agent: unix

Published: 1/26/2016

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2015-8138

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:ntpdate, p-cpe:/a:centos:centos:ntp, p-cpe:/a:centos:centos:ntp-doc, p-cpe:/a:centos:centos:sntp, p-cpe:/a:centos:centos:ntp-perl

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2016

Vulnerability Publication Date: 1/30/2017

Reference Information

CVE: CVE-2015-8138

RHSA: 2016:0063