An interactive command-line tool for exploring and exploiting the CTF protocol on Windows systems.
CTFTOOL is an interactive command-line tool for exploring and exploiting the CTF (Common Text Framework) protocol on Windows. It allows security researchers to experiment with CTF clients and servers, discover vulnerabilities, and demonstrate security flaws like privilege escalation and edit session attacks. The tool was instrumental in uncovering critical design issues in Windows Text Services that have existed for decades.
Security researchers, penetration testers, and Windows internals enthusiasts who need to analyze CTF protocol vulnerabilities or study Windows security mechanisms.
CTFTOOL provides unique capabilities for interacting with the undocumented CTF protocol, including built-in exploitation scripts and cross-session attack demonstrations not available in other tools. Its interactive nature makes it ideal for both learning and practical security testing.
Interactive CTF Exploration Tool
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Provides a shell-like interface with commands like connect, scan, and callstub for direct interaction with CTF clients and servers, as shown in the usage examples and help menu.
Includes ready-to-use scripts such as ctf-consent-system.ctf for demonstrating privilege escalation exploits on Windows 10, with detailed exploitation notes in the README.
Allows connecting to CTF monitors in different Windows sessions via the connect command, enabling testing of Terminal Services isolation flaws described in the Cross Session Attacks section.
Supports scripting with .ctf files for automating interactions, useful for fuzzing or repeated exploitation scenarios, as mentioned in the usage and script command descriptions.
Exploit scripts are specifically for Windows 10 x64 1903, with no PoC for other versions, and testing is limited to Windows 7, 8, and 10, leaving earlier versions unsupported.
The tool is considered in proof-of-concept state, meaning it may have bugs, lacks production-ready reliability, and future Windows updates could break functionality, as noted in the Status section.
Requires Visual Studio 2019, GNU make, and specific dependencies with submodules, making setup non-trivial for casual users, as detailed in the Building section.