DoS on extended ASCII characted in EHLO command. Multiple IMAP buffer overflows. Authorization HTTPS buffer overflow.
vulners.com/securityvulns/securityvulns:doc:8236
vulners.com/securityvulns/securityvulns:doc:8252
vulners.com/securityvulns/securityvulns:doc:8253
vulners.com/securityvulns/securityvulns:doc:8426
vulners.com/securityvulns/securityvulns:doc:9158
vulners.com/securityvulns/securityvulns:doc:9168