The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Unknown vulnerability in the Web calendaring component of Ipswitch IMail Server before 8.13 allows remote attackers to cause a denial of service (crash) via "specific content."

Multiple features in Ipswitch IMail Server before 8.13 allow remote attackers to cause a denial of service (crash) via (1) a long sender field to the Queue Manager or (2) a long To field to the Web Messaging component.

Buffer overflow in the Web Messaging daemon for Ipswitch IMail before 7.12 allows remote attackers to execute arbitrary code via a long HTTP GET request for HTTP/1.0.

IPSwitch IMail Web Calendaring service (iwebcal) allows remote attackers to cause a denial of service (crash) via an HTTP POST request without a Content-Length field.

Buffer overflow in the LDAP component of Ipswitch IMail 7.1 and earlier allows remote attackers to execute arbitrary code via a long "bind DN" parameter.

Ipswitch IMail 7.0.4 and earlier allows attackers with administrator privileges to read and modify user alias and mailing list information for other domains hosted by the same server via the (1) aliasadmin or (2) listadm1 CGI programs, which do not properly verify that an administrator is the administrator for the target domain.