The Wertheim SafeController Family 65000, Controller 65000 - AssemblyVersion 6.11.8130.22319, uses weak custom cryptographic algorithms with hard-coded cryptographic keys to protect communication. An attacker in an adversary-in-the-middle position can decrypt the data traffic. During reassessment, it was possible to break the encryption/decryption routine and decrypt messages without knowledge of the encryption key. It was also possible to gain knowledge about the encryption key by intercepting enough messages.
Credits
Gorazd Jank, SEC Consult Vulnerability Lab
Christian Hager, SEC Consult Vulnerability Lab
Philipp Espernberger, SEC Consult Vulnerability Lab
