Script smb-webexec-exploit

Script types: portrule
Categories: intrusive, exploit
Download: https://svn.nmap.org/nmap/scripts/smb-webexec-exploit.nse

Script Summary

Attempts to run a command via WebExService, using the WebExec vulnerability. Given a Windows account (local or domain), this will start an arbitrary executable with SYSTEM privileges over the SMB protocol.

The argument webexec_command will run the command directly. It may or may not start with a GUI. webexec_gui_command will always start with a GUI, and is useful for running commands such as "cmd.exe" as SYSTEM if you have access.

References:

• https://www.webexec.org
• https://blog.skullsecurity.org/2018/technical-rundown-of-webexec

See also:

• smb-vuln-webexec.nse

Script Arguments

webexec_gui_command

The command to run on the target with a GUI

webexec_command

The command to run on the target

randomseed, smbbasic, smbport, smbsign

See the documentation for the smb library.

smbdomain, smbhash, smbnoguest, smbpassword, smbtype, smbusername

See the documentation for the smbauth library.

Example Usage

nmap --script smb-vuln-webexec --script-args 'smbusername=<username>,smbpass=<password>,webexec_command=net user test test /add' -p139,445 <host>
nmap --script smb-vuln-webexec --script-args 'smbusername=<username>,smbpass=<password>,webexec_gui_command=cmd' -p139,445 <host>

Script Output

| smb-vuln-webexec:
|_  Vulnerable: WebExService could be accessed remotely as the given user!

| smb-vuln-webexec:
|   Vulnerable: WebExService could be accessed remotely as the given user!
|_  ...and successfully started console command: net user test test /add

Requires

• msrpc
• smb
• stdnse
• string
• shortport
• stringaux

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Author:

• Ron Bowes

License: Same as Nmap--See https://nmap.org/book/man-legal.html