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- May 4, 2019
- 825
This is a demonstration of exploiting Microsoft CTF to gain SYSTEM privileges in Windows 10. This was Project Zero issue 1859, and MSRC issue 52101.
Microsoft CTF Exploitation Demo (Windows 10 x64 1903)
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It is advised to take all reviews with a grain of salt. In extreme cases some reviews use dramatization for entertainment purposes.
- Dec 23, 2014
- 8,513
The bug used by Tavis Ormandy was patched in August via Windows Update, but the CTF protocol is vulnerable by design. Here is why:
"Any application, any user - even sandboxed processes - can connect to any CTF session. Clients are expected to report their thread id, process id and HWND, but there is no authentication involved and you can simply lie.
"So you could connect to another user's active session and take over any application, or wait for an Administrator to login and compromise their session."
Of course, the system has to be first compromised by another kind of exploit or malware.
"Any application, any user - even sandboxed processes - can connect to any CTF session. Clients are expected to report their thread id, process id and HWND, but there is no authentication involved and you can simply lie.
"So you could connect to another user's active session and take over any application, or wait for an Administrator to login and compromise their session."
Of course, the system has to be first compromised by another kind of exploit or malware.
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