An issue was discovered in SaltStack Salt before 3002.5. The minion's restartcheck is vulnerable to command injection via a crafted process name. This allows for a local privilege escalation by any user able to create a files on the minion in a non-blacklisted directory.
https://github.com/stealthcopter/CVE-2020-28243
https://lists.debian.org/debian-lts-announce/2021/11/msg00009.html
https://lists.debian.org/debian-lts-announce/2022/01/msg00000.html
https://security.gentoo.org/glsa/202103-01