CVE-2022-4304 A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenSSL 3.0 | 3.0.0 → < 3.0.8 | 3.0.8 |
| OpenSSL 1.1 | earliest → < 1.1.1t | 1.1.1t |
| OpenSSL 1.0 | earliest → < 1.0.2zg | 1.0.2zg |
| SCALANCE W1750D (JP) 8.10 | earliest → < 8.10.0.9 | 8.10.0.9 |
| SCALANCE W1750D (ROW) 8.10 | earliest → < 8.10.0.9 | 8.10.0.9 |
| SCALANCE W1750D (USA) 8.10 | earliest → < 8.10.0.9 | 8.10.0.9 |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 | earliest → < 1.1 | 1.1 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
References
- OpenSSL Advisory www.openssl.org
- security.gentoo.org security.gentoo.org
Timeline
- Published
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