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

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

Severity

5

CVSS

(AV:N/AC:H/Au:N/C:N/I:C/A:N)

Published

02/07/2023

Created

02/14/2025

Added

02/14/2025

Modified

02/14/2025

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.

Solution(s)

• amazon-linux-2023-upgrade-openssl
• amazon-linux-2023-upgrade-openssl-debuginfo
• amazon-linux-2023-upgrade-openssl-debugsource
• amazon-linux-2023-upgrade-openssl-devel
• amazon-linux-2023-upgrade-openssl-libs
• amazon-linux-2023-upgrade-openssl-libs-debuginfo
• amazon-linux-2023-upgrade-openssl-perl

References

• https://attackerkb.com/topics/cve-2022-4304
• CVE - 2022-4304
• https://alas.aws.amazon.com/AL2023/ALAS-2023-101.html