AlmaLinux 8 : systemd (ALSA-2021:1611)

high Nessus Plugin ID 157711


The remote AlmaLinux host is missing one or more security updates.


The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:1611 advisory.

- In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the allow_active element rather than allow_any. (CVE-2019-3842)

- systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

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


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 157711

File Name: alma_linux_ALSA-2021-1611.nasl

Version: 1.5

Type: local

Published: 2/9/2022

Updated: 5/6/2022

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.9

Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C

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

CVSS Score Source: CVE-2020-13776


Risk Factor: High

Base Score: 7

Temporal Score: 6.3

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

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

CVSS Score Source: CVE-2019-3842

Vulnerability Information

CPE: p-cpe:/a:alma:linux:systemd, p-cpe:/a:alma:linux:systemd-container, p-cpe:/a:alma:linux:systemd-devel, p-cpe:/a:alma:linux:systemd-journal-remote, p-cpe:/a:alma:linux:systemd-libs, p-cpe:/a:alma:linux:systemd-pam, p-cpe:/a:alma:linux:systemd-tests, p-cpe:/a:alma:linux:systemd-udev, cpe:/o:alma:linux:8

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/18/2021

Vulnerability Publication Date: 4/9/2019

Reference Information

CVE: CVE-2019-3842, CVE-2020-13776

ALSA: 2021:1611