CVE-2022-4304 (GCVE-0-2022-4304)

Vulnerability from cvelistv5 – Published: 2023-02-08 19:04 – Updated: 2025-11-04 19:14
VLAI
Title
Timing Oracle in RSA Decryption
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.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • timing based side channel attack
  • CWE-203 - Observable Discrepancy
Assigner
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 3.0.0 , < 3.0.8 (semver)
Affected: 1.1.1 , < 1.1.1t (custom)
Affected: 1.0.2 , < 1.0.2zg (custom)
Create a notification for this product.
Date Public
2023-02-07 00:00
Credits
Hubert Kario from RedHat Dmitry Belyavsky from RedHat Hubert Kario from RedHat
Show details on NVD website
To clipboard 

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      "cveMetadata": "{\"cveId\": \"CVE-2022-4304\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T19:14:12.161Z\", \"dateReserved\": \"2022-12-06T10:38:40.463Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-02-08T19:04:28.890Z\", \"assignerShortName\": \"openssl\"}",
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}


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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.