Multiple unspecified vulnerabilities in MDaemon and WorldClient in Alt-N Technologies MDaemon before 9.50 allow attackers to cause a denial of service (memory consumption) via unspecified vectors resulting in memory leaks.

WorldClient email client in MDaemon 2.8 includes the session ID in the referer field of an HTTP request when the user clicks on a URL, which allows the visited web site to hijack the session ID and read the user's email.

Buffer overflow in Alt-N MDaemon 7.0.1 allows remote attackers to cause a denial of service (application crash) via a long STATUS command to the IMAP server.

Multiple heap-based buffer overflows in the POP3 server in Alt-N Technologies MDaemon before 9.0.6 allow remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via long strings that contain '@' characters in the (1) USER and (2) APOP commands.

Buffer overflow in Alt-N MDaemon, possibly 9.0.1 and earlier, allows remote attackers to execute arbitrary code via a long A0001 argument that begins with a '"' (double quote).