Detections
Analytics

Amazon Linux 2 : ntp (ALAS-2021-1706)

high Nessus Plugin ID 153422

Language:

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of ntp installed on the remote host is prior to 4.2.8p15-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1706 advisory.

 The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013. (CVE-2013-5211)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update ntp' to update your system.

See Also

https://access.redhat.com/security/cve/CVE-2013-5211

https://alas.aws.amazon.com/AL2/ALAS-2021-1706.html

Plugin Details

Severity: High

ID: 153422

File Name: al2_ALAS-2021-1706.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/16/2021

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: High

Score: 8.4

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-2013-5211

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:sntp, p-cpe:/a:amazon:linux:ntpdate, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:ntp, p-cpe:/a:amazon:linux:ntp-debuginfo, p-cpe:/a:amazon:linux:ntp-perl, p-cpe:/a:amazon:linux:ntp-doc

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/8/2021

Vulnerability Publication Date: 12/30/2013

Reference Information

CVE: CVE-2013-5211

ALAS: 2021-1706