An issue was discovered in through SaltStack Salt before 3002.5. The salt.wheel.pillar_roots.write method is vulnerable to directory traversal.
https://github.com/saltstack/salt/releases
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