Rocky Linux 8 : polkit (RLSA-2022:0267)

high Nessus Plugin ID 184577

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-2022:0267 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.

Plugin Details

Severity: High

ID: 184577

File Name: rocky_linux_RLSA-2022-0267.nasl

Version: 1.1

Type: local

Family: Rocky Linux Local Security Checks

Published: 11/6/2023

Updated: 11/7/2023

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A: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: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

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

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: 1/25/2022

Vulnerability Publication Date: 1/25/2022

CISA Known Exploited Vulnerability Due Dates: 7/18/2022

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Local Privilege Escalation in polkits pkexec)

Reference Information

CVE: CVE-2021-4034

IAVA: 2022-A-0055

Detections

Analytics