GCVE-110-CERTCC-2001-774587

A vulnerability exists in the Telnet Authentication Option and Telnet Data Encryption Option specifications. An ordered list of authentication and encryption options sent from the server to client during negotiation is not cryptographically protected. As a result, an attacker may be able to modify the list and cause less secure authentication and encryption options to be negotiated. An active attacker may be able to disable Telnet data encryption without the client's knowledge.