UBUNTU-CVE-2019-1563

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UBUNTU-CVE-2019-1563

Summary:

Details: 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).

References: https://ubuntu.com/security/CVE-2019-1563, https://www.openssl.org/news/secadv/20190910.txt, https://ubuntu.com/security/notices/USN-4376-1, https://ubuntu.com/security/notices/USN-4376-2, https://ubuntu.com/security/notices/USN-4504-1, https://www.cve.org/CVERecord?id=CVE-2019-1563