CVE-2022-4304
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.
- CVSS 3.1
- 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 24% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-25)
- CWE
- CWE-203
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openssl:openssl
- stormshield:endpoint_security
- stormshield:sslvpn
- stormshield:stormshield_network_security
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p52g-cm5j-mjv4 | crates.io | openssl-src | <111.25.0 | 111.25.0 |
| GHSA-p52g-cm5j-mjv4 | crates.io | openssl-src | >=300.0.0 <300.0.12 | 300.0.12 |
| RUSTSEC-2023-0007 | crates.io | openssl-src | >=0.0.0-0 <111.25.0 >=300.0.0 <300.0.12 | 111.25.0, 300.0.12 |