Whitepaper that gives an overview of the Polkit vulnerability as discussed in CVE-2021-3560. Written in Spanish.
You can download it from the following link: https://packetstormsecurity.com/files/download/165313/polkit-CVE-2021-3560-spanish.pdf
Source: https://packetstormsecurity.com/files/165313/Polkit-CVE-2021-3560-Overview.html