Rocky Linux 8 : polkit (RLSA-2022:267)

high Nessus Plugin ID 157807

Synopsis

The remote Rocky Linux host is missing a security update.

Description

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:267 advisory.

- A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine. (CVE-2021-4034)

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 affected packages.

See Also

https://errata.rockylinux.org/RLSA-2022:267

https://bugzilla.redhat.com/show_bug.cgi?id=2025869

Plugin Details

Severity: High

ID: 157807

File Name: rocky_linux_RLSA-2022-267.nasl

Version: 1.8

Type: local

Published: 2/9/2022

Updated: 8/31/2022

Risk Information

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

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

CVSS Score Source: CVE-2021-4034

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:rocky:linux:polkit, p-cpe:/a:rocky:linux:polkit-debuginfo, p-cpe:/a:rocky:linux:polkit-debugsource, p-cpe:/a:rocky:linux:polkit-devel, p-cpe:/a:rocky:linux:polkit-docs, p-cpe:/a:rocky:linux:polkit-libs, p-cpe:/a:rocky:linux:polkit-libs-debuginfo, cpe:/o:rocky:linux:8

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/26/2022

Vulnerability Publication Date: 1/25/2022

CISA Known Exploited Dates: 7/18/2022

Exploitable With

CANVAS (CANVAS)

Metasploit (Local Privilege Escalation in polkits pkexec)

Reference Information

CVE: CVE-2021-4034

RLSA: 2022:267

IAVA: 2022-A-0055