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CentOS Linux 6 [TuxCare] Security Update: ntp / ntp-doc / ntp-perl / ntpdate Multiple Vulnerabilities (CENTOS6:CLSA-2026:1777453146)

high Nessus Plugin ID 351983

Synopsis

The CentOS Linux host is missing one or more security updates.

Description

The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS6:CLSA-2026:1777453146 advisory.

 - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the other side of an interleaved association causing the victim ntpd to reset its association.
 (CVE-2018-7185)

 - NTP through 4.2.8p12 has a NULL Pointer Dereference. (CVE-2019-8936)

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

Solution

Update the affected packages based on the guidance in TuxCare advisory CENTOS6:CLSA-2026:1777453146.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1777453146

http://www.nessus.org/u?6bf1ea11

Plugin Details

Severity: High

ID: 351983

File Name: tuxcare_centos_6_CLSA-2026-1777453146.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2019-8936

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/29/2026

Vulnerability Publication Date: 2/27/2018

Reference Information

CVE: CVE-2018-7185, CVE-2019-8936

CLSA: 2026:1777453146