SaltStack Salt Master Server Root Key Disclosure

This module exploits unauthenticated access to the _prep_auth_info()
method in the SaltStack Salt master's ZeroMQ request server, for
versions 2019.2.3 and earlier and 3000.1 and earlier, to disclose the
root key used to authenticate administrative commands to the master.

VMware vRealize Operations Manager versions 7.5.0 through 8.1.0, as
well as Cisco Modeling Labs Corporate Edition (CML) and Cisco Virtual
Internet Routing Lab Personal Edition (VIRL-PE), for versions 1.2,
1.3, 1.5, and 1.6 in certain configurations, are known to be affected
by the Salt vulnerabilities.

Tested against SaltStack Salt 2019.2.3 and 3000.1 on Ubuntu 18.04, as
well as Vulhub's Docker image.