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Amazon Linux 2 : systemd (ALAS-2020-1388)

high Nessus Plugin ID 133552

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Synopsis

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

Description

The version of systemd installed on the remote host is prior to 219-57. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2020-1388 advisory.

 A heap use-after-free vulnerability was found in systemd, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.
 (CVE-2020-1712)

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 systemd' to update your system.

See Also

https://access.redhat.com/security/cve/CVE-2020-1712

https://alas.aws.amazon.com/AL2/ALAS-2020-1388.html

Plugin Details

Severity: High

ID: 133552

File Name: al2_ALAS-2020-1388.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2/10/2020

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-1712

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libgudev1, p-cpe:/a:amazon:linux:systemd-resolved, p-cpe:/a:amazon:linux:systemd-journal-gateway, p-cpe:/a:amazon:linux:systemd-libs, p-cpe:/a:amazon:linux:systemd-networkd, p-cpe:/a:amazon:linux:libgudev1-devel, p-cpe:/a:amazon:linux:systemd, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:systemd-python, p-cpe:/a:amazon:linux:systemd-sysv, p-cpe:/a:amazon:linux:systemd-debuginfo, p-cpe:/a:amazon:linux:systemd-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/8/2020

Vulnerability Publication Date: 3/31/2020

Reference Information

CVE: CVE-2020-1712

ALAS: 2020-1388