Your submission was sent successfully! Close

CVE-2021-4034

Published: 25 January 2022

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.

Priority

High

CVSS 3 base score: 7.8

Status

Package Release Status
policykit-1
Launchpad, Ubuntu, Debian
bionic
Released (0.105-20ubuntu0.18.04.6)
focal
Released (0.105-26ubuntu1.2)
hirsute Ignored
(reached end-of-life)
impish
Released (0.105-31ubuntu0.1)
jammy
Released (0.105-31ubuntu1)
trusty
Released (0.105-4ubuntu3.14.04.6+esm1)
upstream Needs triage

xenial
Released (0.105-14.1ubuntu0.5+esm1)