Off-by-one error in the rfc822_output_char function in the RFC822BUFFER routines in the University of Washington (UW) c-client library, as used by the UW IMAP toolkit before imap-2007e and other applications, allows context-dependent attackers to cause a denial of service (crash) via an e-mail message that triggers a buffer overflow.

Buffer overflow in University of Washington imap server (uw-imapd) imap-2001 (imapd 2001.315) and imap-2001a (imapd 2001.315) with legacy RFC 1730 support, and imapd 2000.287 and earlier, allows remote authenticated users to execute arbitrary code via a long BODY request.