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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: openssl
Published: 2023-02-08T19:04:28.890Z
Updated: 2024-08-03T01:34:50.158Z
Reserved: 2022-12-06T10:38:40.463Z
Link: CVE-2022-4304
Vulnrichment
No data.
NVD
Status : Modified
Published: 2023-02-08T20:15:23.887
Modified: 2024-11-21T07:34:58.630
Link: CVE-2022-4304
Redhat