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 polkit: Local privilege escalation in pkexec due to incorrect handling of argument vector

Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Red Hat, Inc. CWE-125

Red Hat, Inc. CWE-787

https://access.redhat.com/errata/RHSA-2022:0265 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0266 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0267 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0268 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0269 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0270 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0271 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0272 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0273 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0274 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0443 [No Types Assigned]

https://access.redhat.com/errata/RHSA-2022:0540 [No Types Assigned]

https://access.redhat.com/security/cve/CVE-2021-4034 [No Types Assigned]

CWE-125 / More specific CWE option available