CVE-2019-1563

In situations where an attacker receives automated notification of the
success or failure of a decryption attempt an attacker, after sending a
very large number of messages to be decrypted, can recover a CMS/PKCS7
transported encryption key or decrypt any RSA encrypted message that was
encrypted with the public RSA key, using a Bleichenbacher padding oracle
attack. Applications are not affected if they use a certificate together
with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to
select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d
(Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k).
Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).