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Debian DLA-2715-1 : systemd - LTS security update

medium Nessus Plugin ID 151834

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2715 advisory.

 The Qualys Research Labs discovered that an attacker-controlled allocation using the alloca() function could result in memory corruption, allowing to crash systemd and hence the entire operating system.
 Details can be found in the Qualys advisory at https://www.qualys.com/2021/07/20/cve-2021-33910/denial-of- service-systemd.txt For Debian 9 stretch, this problem has been fixed in version 232-25+deb9u13. We recommend that you upgrade your systemd packages. For the detailed security status of systemd please refer to its security tracker page at: https://security-tracker.debian.org/tracker/systemd Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the systemd packages.

For Debian 9 stretch, this problem has been fixed in version 232-25+deb9u13.

See Also

https://security-tracker.debian.org/tracker/source-package/systemd

https://www.debian.org/lts/security/2021/dla-2715

https://security-tracker.debian.org/tracker/CVE-2021-33910

https://packages.debian.org/source/stretch/systemd

Plugin Details

Severity: Medium

ID: 151834

File Name: debian_DLA-2715.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/20/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2021-33910

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:N/I:N/A:H

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:udev, p-cpe:/a:debian:debian_linux:libudev-dev, p-cpe:/a:debian:debian_linux:libpam-systemd, p-cpe:/a:debian:debian_linux:systemd-coredump, p-cpe:/a:debian:debian_linux:libnss-mymachines, p-cpe:/a:debian:debian_linux:libnss-myhostname, p-cpe:/a:debian:debian_linux:libnss-systemd, p-cpe:/a:debian:debian_linux:libsystemd0, p-cpe:/a:debian:debian_linux:systemd-journal-remote, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:systemd-container, p-cpe:/a:debian:debian_linux:systemd-sysv, p-cpe:/a:debian:debian_linux:libsystemd-dev, p-cpe:/a:debian:debian_linux:systemd, p-cpe:/a:debian:debian_linux:libudev1, p-cpe:/a:debian:debian_linux:libnss-resolve

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/20/2021

Vulnerability Publication Date: 7/20/2021

Reference Information

CVE: CVE-2021-33910

IAVA: 2021-A-0350