vulnerability

Amazon Linux 2023: CVE-2022-4304: Important priority package update for openssl

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:C/A:N)
Published
Feb 7, 2023
Added
Feb 17, 2025
Modified
Jul 4, 2025

Description

A timing based side channel exists in the OpenSSL RSA Decryption implementation
which could be sufficient to recover a plaintext across a network in a
Bleichenbacher style attack. To achieve a successful decryption an attacker
would have to be able to send a very large number of trial messages for
decryption. 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 send an
encrypted pre-master secret to the server. An attacker that had observed a
genuine connection between a client and a server could use this flaw to send
trial messages to the server and record the time taken to process them. After a
sufficiently large number of messages the attacker could recover the pre-master
secret used for the original connection and thus be able to decrypt the
application data sent over that connection.
A timing-based side channel exists in the OpenSSL RSA Decryption implementation, which could be sufficient to recover a ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption, an attacker would have to be able to send a very large number of trial messages for decryption. This issue affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP, and RSASVE.

Solutions

amazon-linux-2023-upgrade-opensslamazon-linux-2023-upgrade-openssl-debuginfoamazon-linux-2023-upgrade-openssl-debugsourceamazon-linux-2023-upgrade-openssl-develamazon-linux-2023-upgrade-openssl-libsamazon-linux-2023-upgrade-openssl-libs-debuginfoamazon-linux-2023-upgrade-openssl-perl
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