Amazon Linux 2 : linuxptp (ALAS-2021-1705)

high Nessus Plugin ID 153425

Synopsis

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

Description

The version of linuxptp installed on the remote host is prior to 2.0-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1705 advisory.

- A flaw was found in the ptp4l program of the linuxptp package. When ptp4l is operating on a little-endian architecture as a PTP transparent clock, a remote attacker could send a crafted one-step sync message to cause an information leak or crash. The highest threat from this vulnerability is to data confidentiality and system availability. This flaw affects linuxptp versions before 3.1.1 and before 2.0.1.
(CVE-2021-3571)

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 linuxptp' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1705.html

https://access.redhat.com/security/cve/CVE-2021-3571

Plugin Details

Severity: High

ID: 153425

File Name: al2_ALAS-2021-1705.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/16/2021

Updated: 9/16/2021

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

Risk Information

CVSS Score Source: CVE-2021-3571

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:linuxptp, p-cpe:/a:amazon:linux:linuxptp-debuginfo, cpe:/o:amazon:linux:2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2021

Vulnerability Publication Date: 7/8/2021

Reference Information

CVE: CVE-2021-3571

ALAS: 2021-1705