CVE-2021-4034

HIGHCISA KEV

7.8

Description

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.

Details CVE

Score CVSS v3.17.8

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie1/28/2022

Derniere modification11/6/2025

Sourcekev

Observations honeypot0

CISA KEV

FournisseurRed Hat

ProduitPolkit

Nom vulnerabiliteRed Hat Polkit Out-of-Bounds Read and Write Vulnerability

Date ajout KEV2022-06-27

Date limite remediation2022-07-18

Utilise dans ransomwareUnknown

Produits affectes

canonical:ubuntu_linuxoracle:http_serveroracle:zfs_storage_appliance_kitpolkit_project:polkitredhat:enterprise_linuxredhat:enterprise_linux_desktopredhat:enterprise_linux_eusredhat:enterprise_linux_for_ibm_z_systemsredhat:enterprise_linux_for_ibm_z_systems_eusredhat:enterprise_linux_for_power_big_endianredhat:enterprise_linux_for_power_little_endianredhat:enterprise_linux_for_power_little_endian_eusredhat:enterprise_linux_for_scientific_computingredhat:enterprise_linux_serverredhat:enterprise_linux_server_ausredhat:enterprise_linux_server_eusredhat:enterprise_linux_server_tusredhat:enterprise_linux_server_update_services_for_sap_solutionsredhat:enterprise_linux_workstationsiemens:scalance_lpe9403siemens:scalance_lpe9403_firmwaresiemens:sinumerik_edgestarwindsoftware:command_centerstarwindsoftware:starwind_virtual_sansuse:enterprise_storagesuse:linux_enterprise_desktopsuse:linux_enterprise_high_performance_computingsuse:linux_enterprise_serversuse:linux_enterprise_workstation_extensionsuse:manager_proxysuse:manager_server