CVE-2024-0914: Opencryptoki: timing side-channel in handling of rsa pkcs#1 v1.5 padded ciphertexts (marvin)

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-31 · updated 2026-06-17
Weakness: CWE-203

Description

A timing side-channel vulnerability has been discovered in the opencryptoki package while processing RSA PKCS#1 v1.5 padded ciphertexts. This flaw could potentially enable unauthorized RSA ciphertext decryption or signing, even without access to the corresponding private key.

Affected products

opencryptoki: before 3.23.0 — fixed in 3.23.0
Red Hat Enterprise Linux: 8.0, 9.0

How to fix

Upgrade to a fixed version: opencryptoki 3.23.0. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2024:1239
https://access.redhat.com/errata/RHSA-2024:1411
https://access.redhat.com/errata/RHSA-2024:1608
https://access.redhat.com/errata/RHSA-2024:1856
https://access.redhat.com/errata/RHSA-2024:1992
https://access.redhat.com/security/cve/CVE-2024-0914
https://bugzilla.redhat.com/show_bug.cgi?id=2260407
https://people.redhat.com/~hkario/marvin/
https://access.redhat.com/errata/RHSA-2024:1239
https://access.redhat.com/errata/RHSA-2024:1411
https://access.redhat.com/errata/RHSA-2024:1608
https://access.redhat.com/errata/RHSA-2024:1856

Get alerted when CVE-2024-0914 or the next vulnerability affects your stack