CVE-2022-4304

MEDIUM5.9EPSS 0.22%

Timing Oracle in RSA Decryption

發布日:2023/2/8修改日:2023/11/8
也稱為:GHSA-p52g-cm5j-mjv4ALPINE-CVE-2022-4304CGA-xr7r-gj78-rrcfRUSTSEC-2023-0007

描述

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.

受影響套件(5)

CVSS 分數

來源版本嚴重程度向量
osvCVSS 3.1MEDIUM5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

參考連結(8)