Buffer overflow on processing irc:// URL, DoS on DCC processing.
vulners.com/securityvulns/securityvulns:doc:5238
vulners.com/securityvulns/securityvulns:doc:5239
vulners.com/securityvulns/securityvulns:doc:5240
vulners.com/securityvulns/securityvulns:doc:5290
vulners.com/securityvulns/securityvulns:doc:5524