Cisco’s Elastic Services Controller’s release 3.0.0 software has a critical vulnerability: it accepts an empty admin password.

The Controller (ESC) is Cisco’s automation environment for network function virtualisation (NFV), providing VM and service monitors, automated recovery and dynamic scaling.

Cisco’s advisory about the flaw explains the bug is in ESC’s Web service portal: “An attacker could exploit this vulnerability by submitting an empty password value to an affected portal when prompted to enter an administrative password for the portal.”

Once past the (non)-authentication, the attacker has administrative rights to “execute arbitrary actions” on the target system.

Source: Cisco NFV controller is a bit too elastic: It has an empty password bug • The Register