Unspecified vulnerability in Hitachi TP1/Server Base before 03-05-/P, 05-00-x before 05-00-/G, 05-01-x before 05-01-/A, and 05-02-x before 05-02-/C on HP-UX 11.0 through 11i v3 allows attackers to cause a denial of service by sending certain data to a port.