CVE-2019-1563

Public on 2020-02-17
Modified on 2020-07-17
Description
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).
Severity
Low
CVSS v3 Base Score
3.7
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 openssl 2020-03-23 16:26 ALAS2-2020-1406
Amazon Linux 2 openssl11 2020-07-14 02:39 ALAS2-2020-1456
Amazon Linux 1 openssl 2020-02-17 19:39 ALAS-2020-1344

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N