RHEL 6 : ntp (RHSA-2015:2520)

high Nessus Plugin ID 87101

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Synopsis

The remote Red Hat host is missing a security update for ntp.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2015:2520 advisory.

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 timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with the server. (CVE-2015-7704)

Red Hat would like to thank Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg of Boston University for reporting this issue.

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL ntp package based on the guidance in RHSA-2015:2520.

Plugin Details

Severity: High

ID: 87101

File Name: redhat-RHSA-2015-2520.nasl

Version: 2.17

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 11/30/2015

Updated: 11/4/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2015-7704

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:ntp-doc, cpe:/o:redhat:rhel_eus:6.6, p-cpe:/a:redhat:enterprise_linux:ntp, p-cpe:/a:redhat:enterprise_linux:ntp-perl, cpe:/o:redhat:rhel_eus:6.5, p-cpe:/a:redhat:enterprise_linux:ntpdate

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/26/2015

Vulnerability Publication Date: 8/7/2017

Reference Information

CVE: CVE-2015-7704

CWE: 20

RHSA: 2015:2520

Detections

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