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HP TCP/IP Services for OpenVMS User Enumeration Weakness and Security Bypass Vulnerabilities

HP TCP/IP Services for OpenVMS is prone to a user-enumeration weakness and a security-bypass vulnerability.

An attacker can exploit these issues to enumerate valid usernames and to launch brute-force attacks.

These issues affect the POP3 service included in TCP/IP 5.6 for OpenVMS; other versions may also be affected. The POP3 service is not enabled by default.