polkit: fix local priviledge escalation in pkexec
polkit: fix local priviledge escalation in pkexec

> We discovered a Local Privilege Escalation (from any user to root) in
> polkit's pkexec, a SUID-root program that is installed by default on
> every major Linux distribution

https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt

Fixes: CVE-2021-4034

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs