CVE-2022-4304
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.
How to fix
- openssl openssl1.0.2zg, 1.1.1t, 3.0.8 or later
- stormshield endpoint_security7.2.40 or later
- stormshield sslvpn3.2.1 or later
- stormshield stormshield_network_security2.7.11, 3.7.34, 3.11.22, 4.3.16, 4.6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openssl openssl | 1.0.2 ≤ v < 1.0.2zg, 1.1.1 ≤ v < 1.1.1t, 3.0.0 ≤ v < 3.0.8 | 1.0.2zg, 1.1.1t, 3.0.8 |
| stormshield endpoint_security | v < 7.2.40 | 7.2.40 |
| stormshield sslvpn | v < 3.2.1 | 3.2.1 |
| stormshield stormshield_network_security | 2.7.0 ≤ v < 2.7.11, 2.8.0 ≤ v < 3.7.34, 3.8.0 ≤ v < 3.11.22, 4.0.0 ≤ v < 4.3.16, 4.4.0 ≤ v < 4.6.3 | 2.7.11, 3.7.34, 3.11.22, 4.3.16, 4.6.3 |
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