Vulnerability Instance

Some TLS implementations handle errors processing RSA key exchanges and
        encryption (PKCS #1 v1.5 messages) in a broken way that leads an
        adaptive chosen-chiphertext attack. Attackers cannot recover a server's
        private key, but they can decrypt and sign messages with it. A strong
        oracle occurs when the TLS server does not strictly check message
        formatting and needs less than a million requests on average to decode
        a given ciphertext. A weak oracle server strictly checks message
        formatting and often requires many more requests to perform the attack.

        This module requires Python 3 with the gmpy2 and cryptography packages
        to be present.

AKA:
  - ROBOT
  - Adaptive chosen-ciphertext attack