libssl3t64: A timing based side channel exists in the OpenSSL RSA Decryptionimplementationwhich could be sufficient to recover a...

A timing based side channel exists in the OpenSSL RSA Decryptionimplementationwhich could be sufficient to recover a plaintext across a network in aBleichenbacher style attack. To achieve a successful decryption an attackerwould have to be able to send a very large number of trial messages fordecryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5,RSA-OEAP and RSASVE.For example, in a TLS connection, RSA is commonly used by a client to sendanencrypted pre-master secret to the server. An attacker that had observed agenuine connection between a client and a server could use this flaw tosendtrial messages to the server and record the time taken to process them.After asufficiently large number of messages the attacker could recover thepre-mastersecret used for the original connection and thus be able to decrypt theapplication data sent over that connection.

Where it's fixed