Timing Oracle in RSA Decryption
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.
CVE-2022-4304
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2022-4304
OpenSSL
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "OpenSSL",
"product": "OpenSSL",
"versions": [
{
"status": "affected",
"version": "3.0.0",
"lessThan": "3.0.8",
"versionType": "semver"
},
{
"status": "affected",
"version": "1.1.1",
"lessThan": "1.1.1t",
"versionType": "custom"
},
{
"status": "affected",
"version": "1.0.2",
"lessThan": "1.0.2zg",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2022-4304
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #21973 · Revision 1
- Added to Heist Feed
- Publisher date