In multiple products by Festo a remote unauthenticated attacker could use functions of an undocumented protocol which could lead to a complete loss of confidentiality, integrity and availability.
The Festo CECX-X-C1 Modular Master Controller with CoDeSys and CECX-X-M1
Modular Controller with CoDeSys and SoftMotion provide an undocumented
access method involving the FTP protocol, which could allow a remote attacker to execute arbitrary code or cause a denial of service (application
crash) via unspecified vectors.
The Festo CECX-X-C1 Modular Master Controller with CoDeSys and CECX-X-M1 Modular Controller with CoDeSys and SoftMotion do not require authentication for connections to certain TCP ports, which allows remote attackers to (1) modify the configuration via a request to the debug service on port 4000 or (2) delete log entries via a request to the log service on port 4001.