An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. The salt-master process ClearFuncs class does not properly validate method calls. This allows a remote user to access some methods without authentication. These methods can be used to retrieve user tokens from the salt master and/or run arbitrary commands on salt minions.
lists.opensuse.org/opensuse-security-announce/2020-04/msg00047.html
lists.opensuse.org/opensuse-security-announce/2020-07/msg00070.html
packetstormsecurity.com/files/157560/Saltstack-3000.1-Remote-Code-Execution.html
packetstormsecurity.com/files/157678/SaltStack-Salt-Master-Minion-Unauthenticated-Remote-Code-Execution.html
www.vmware.com/security/advisories/VMSA-2020-0009.html
docs.saltstack.com/en/latest/topics/releases/2019.2.4.html
github.com/saltstack/salt/blob/v3000.2_docs/doc/topics/releases/3000.2.rst
lists.debian.org/debian-lts-announce/2020/05/msg00027.html
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-salt-2vx545AG
usn.ubuntu.com/4459-1/
www.debian.org/security/2020/dsa-4676