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.

Database specific

{
    "cna_assigner": "openssl",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/4xxx/CVE-2022-4304.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.0.8"
                },
                {
                    "introduced": "1.1.1"
                },
                {
                    "fixed": "1.1.1t"
                },
                {
                    "introduced": "1.0.2"
                },
                {
                    "fixed": "1.0.2zg"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/openssl/openssl

Affected ranges

Type

GIT

Repo

https://github.com/openssl/openssl

Events

Introduced

e818b74be2170fbe957a07b0da4401c2b694b3b8

Fixed

e818b74be2170fbe957a07b0da4401c2b694b3b8

Introduced

e04bd3433fd84e1861bf258ea37928d9845e6a86

Fixed

e04bd3433fd84e1861bf258ea37928d9845e6a86

Introduced

89cd17a031e022211684eb7eb41190cf1910f9fa

Fixed

31157bc0b46e04227b8468d3e6915e4d0332777c

Database specific

Show details

{
    "cpe": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.0.2"
        },
        {
            "fixed": "1.0.2zg"
        },
        {
            "introduced": "1.1.1"
        },
        {
            "fixed": "1.1.1t"
        },
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.0.8"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

openssl-3.*

openssl-3.0.0

openssl-3.0.1

openssl-3.0.2

openssl-3.0.3

openssl-3.0.4

openssl-3.0.5

openssl-3.0.6

openssl-3.0.7

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-4304.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "28170854778703993674264004058177114599",
                "73132526844288570625317440636111911761",
                "177405411499435185068645597737938634778",
                "224809958623850711330610094965797758930",
                "295554444428855106393106961197201359586"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2022-4304-c377fa22",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openssl/openssl/commit/e04bd3433fd84e1861bf258ea37928d9845e6a86",
        "target": {
            "file": "include/openssl/opensslv.h"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "251633914150035957322733061977107206211",
                "338514574181828579838011565939158652696",
                "76638288692106140328510055542557597351",
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                "172177136897997206866313011107384691461"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2022-4304-e051451f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openssl/openssl/commit/e818b74be2170fbe957a07b0da4401c2b694b3b8",
        "target": {
            "file": "crypto/opensslv.h"
        }
    }
]

vanir_signatures_modified

"2026-09-16T08:19:03Z"