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RHEL 8 : systemd (RHSA-2021:2721)

medium Nessus Plugin ID 151854

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Synopsis

The remote Red Hat host is missing a security update for systemd.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:2721 advisory.

 The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups.
 In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit.

 Security Fix(es):

 * systemd: uncontrolled allocation on the stack in function unit_name_path_escape leads to crash (CVE-2021-33910)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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

Update the RHEL systemd package based on the guidance in RHSA-2021:2721.

See Also

http://www.nessus.org/u?9eaa88e3

https://access.redhat.com/security/updates/classification/#important

https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

https://access.redhat.com/errata/RHSA-2021:2721

https://bugzilla.redhat.com/show_bug.cgi?id=1970887

Plugin Details

Severity: Medium

ID: 151854

File Name: redhat-RHSA-2021-2721.nasl

Version: 1.12

Type: local

Agent: unix

Published: 7/21/2021

Updated: 11/7/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Important

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:redhat:enterprise_linux:systemd-journal-remote, p-cpe:/a:redhat:enterprise_linux:systemd-pam, p-cpe:/a:redhat:enterprise_linux:systemd, p-cpe:/a:redhat:enterprise_linux:systemd-libs, p-cpe:/a:redhat:enterprise_linux:systemd-devel, cpe:/o:redhat:rhel_eus:8.2, p-cpe:/a:redhat:enterprise_linux:systemd-udev, p-cpe:/a:redhat:enterprise_linux:systemd-container, p-cpe:/a:redhat:enterprise_linux:systemd-tests

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

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

CWE: 400

IAVA: 2021-A-0350

RHSA: 2021:2721