vulnerability

OpenSSL vulnerability (CVE-2022-4304)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:C/I:N/A:N)
Published
02/08/2023
Added
02/08/2023
Modified
02/17/2025

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.

Solution(s)

http-openssl-1_0_2-upgrade-1_0_2_z_ghttp-openssl-1_1_1-upgrade-1_1_1_thttp-openssl-3_0_8-upgrade-3_0_8
Title
NEW

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