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.
References
| Link | Resource |
|---|---|
| https://security.gentoo.org/glsa/202402-08 | |
| https://www.openssl.org/news/secadv/20230207.txt | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
04 Feb 2024, 09:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
07 Nov 2023, 03:57
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | 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. |
08 Aug 2023, 14:22
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-203 |
19 Jul 2023, 00:57
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Stormshield sslvpn
Stormshield Stormshield stormshield Network Security Stormshield endpoint Security |
|
| CPE | cpe:2.3:a:stormshield:endpoint_security:*:*:*:*:*:*:*:* cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* cpe:2.3:a:stormshield:sslvpn:*:*:*:*:*:*:*:* |
24 Feb 2023, 17:13
| Type | Values Removed | Values Added |
|---|---|---|
| References | (MISC) https://www.openssl.org/news/secadv/20230207.txt - Vendor Advisory | |
| CWE | NVD-CWE-Other | |
| First Time |
Openssl
Openssl openssl |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.9 |
| CPE | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
08 Feb 2023, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2023-02-08 20:15
Updated : 2024-02-04 09:15
NVD link : CVE-2022-4304
Mitre link : CVE-2022-4304
CVE.ORG link : CVE-2022-4304
JSON object : View
Products Affected
stormshield
- endpoint_security
- stormshield_network_security
- sslvpn
openssl
- openssl
CWE
CWE-203
Observable Discrepancy