Amazon Linux 2023 : systemd, systemd-container, systemd-devel (ALAS2023-2023-025)

medium Nessus Plugin ID 173143

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-025 advisory.

A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

A vulnerability was found in systemd. This security flaw can cause a local information leak due to systemd-coredump not respecting the fs.suid_dumpable kernel setting. (CVE-2022-4415)

systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology is to crash a binary calling the same function recursively, and put it in a deeply nested directory to make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16 is set for the systemd/units/systemd-coredump.socket file. (CVE-2022-45873)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'dnf update systemd --releasever=2023.0.20230222 ' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-025.html

https://alas.aws.amazon.com/cve/html/CVE-2021-3997.html

https://alas.aws.amazon.com/cve/html/CVE-2022-4415.html

https://alas.aws.amazon.com/cve/html/CVE-2022-45873.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 173143

File Name: al2023_ALAS2023-2023-025.nasl

Version: 1.2

Type: local

Agent: unix

Published: 3/21/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2022-4415

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:systemd-standalone-sysusers-debuginfo, p-cpe:/a:amazon:linux:systemd-networkd, p-cpe:/a:amazon:linux:systemd-pam-debuginfo, p-cpe:/a:amazon:linux:systemd-debuginfo, p-cpe:/a:amazon:linux:systemd-pam, p-cpe:/a:amazon:linux:systemd-devel, p-cpe:/a:amazon:linux:systemd-resolved, p-cpe:/a:amazon:linux:systemd-oomd-defaults, p-cpe:/a:amazon:linux:systemd-standalone-sysusers, p-cpe:/a:amazon:linux:systemd-standalone-tmpfiles-debuginfo, p-cpe:/a:amazon:linux:systemd-tests, p-cpe:/a:amazon:linux:systemd-rpm-macros, p-cpe:/a:amazon:linux:systemd, p-cpe:/a:amazon:linux:systemd-tests-debuginfo, p-cpe:/a:amazon:linux:systemd-libs-debuginfo, p-cpe:/a:amazon:linux:systemd-libs, p-cpe:/a:amazon:linux:systemd-container, p-cpe:/a:amazon:linux:systemd-debugsource, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:systemd-journal-remote, p-cpe:/a:amazon:linux:systemd-networkd-debuginfo, p-cpe:/a:amazon:linux:systemd-udev, p-cpe:/a:amazon:linux:systemd-udev-debuginfo, p-cpe:/a:amazon:linux:systemd-standalone-tmpfiles, p-cpe:/a:amazon:linux:systemd-resolved-debuginfo, p-cpe:/a:amazon:linux:systemd-journal-remote-debuginfo, p-cpe:/a:amazon:linux:systemd-container-debuginfo

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: 2/17/2023

Vulnerability Publication Date: 3/8/2022

Reference Information

CVE: CVE-2021-3997, CVE-2022-4415, CVE-2022-45873