Off-by-one error in the SMTP daemon in GroupWise Internet Agent (GWIA) in Novell GroupWise 6.5x, 7.0, 7.01, 7.02, 7.03, 7.03HP1a, and 8.0 allows remote attackers to execute arbitrary code via a long e-mail address in a malformed RCPT command, leading to a buffer overflow.