Description:
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This Metasploit module exploits a stack overflow in Alt-N MDaemon SMTP server for versions 6.8.5 and earlier. When WorldClient HTTP server is installed (default), a CGI script is provided to accept html FORM based emails and deliver via MDaemon.exe, by writing the CGI output to the Raw Queue. When X-FromCheck is enabled (also default), the temporary form2raw.cgi data is copied by MDaemon.exe and a stack based overflow occurs when an excessively long From field is specified. The RawQueue is processed every 1 minute by default, to a maximum of 60 minutes. Keep this in mind when choosing payloads or setting WfsDelay... You'll need to wait. Furthermore, this exploit uses a direct memory jump into a nopsled (which isn't very reliable). Once the payload is written into the Raw Queue by Form2Raw, MDaemon will continue to crash/execute the payload until the CGI output is manually deleted from the queue in C:\\MDaemon\\RawFiles\\*.raw.
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