MediumFix available
openssl, openssl3 — security advisory
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.
- Products
- openssl, openssl3
- Affected versions
- Not specified
- Fixed versions
- 1.1.1t-r0, 3.0.8-r0
- CVEs
- CVE-2022-4304
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:18 UTC · Revision 1
Source evidence
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.
osv:ALPINE-CVE-2022-4304
openssl
Fixed versions: 1.1.1t-r0
openssl
Fixed versions: 1.1.1t-r0
openssl
Fixed versions: 1.1.1t-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl
Fixed versions: 3.0.8-r0
openssl3
Fixed versions: 3.0.8-r0
openssl3
Fixed versions: 3.0.8-r0
Complete source record
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"modified": "2026-10-15T07:17:54.268586460Z",
"provider": "osv",
"upstream": [
"CVE-2022-4304"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-4304"
]
},
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{
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 322020,
"published_at": "2023-02-08T20:15:23.887+00:00"
}