Buffer overflows on STOP, APPEND commands and on IMAP literals parsing.
vulners.com/securityvulns/securityvulns:doc:15475
vulners.com/securityvulns/securityvulns:doc:15476
vulners.com/securityvulns/securityvulns:doc:15477
vulners.com/securityvulns/securityvulns:doc:15478
vulners.com/securityvulns/securityvulns:doc:15479