Detections
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EulerOS Virtualization 2.10.1 : polkit (EulerOS-SA-2022-2061)

high Nessus Plugin ID 163123

Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the polkit packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

 - 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)

 - There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned (CVE-2021-4115)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected polkit packages.

See Also

http://www.nessus.org/u?4c1b960b

Plugin Details

Severity: High

ID: 163123

File Name: EulerOS_SA-2022-2061.nasl

Version: 1.6

Type: local

Published: 7/14/2022

Updated: 1/13/2023

Supported Sensors: 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:huawei:euleros:polkit, p-cpe:/a:huawei:euleros:polkit-libs, cpe:/o:huawei:euleros:uvp:2.10.1

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/14/2022

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, CVE-2021-4115