CVE-2024-0914
opencryptoki: timing side-channel in handling of RSA PKCS#1 v1.5 padded ciphertexts (Marvin)
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 25, 2024
Updated · March 24, 2026
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.
Statement
This vulnerability in opencryptoki, enabling RSA ciphertext decryption or signing without the private key, is moderate due to the significant effort needed to exploit it, including sending a large number of meticulously crafted messages to a vulnerable API-utilizing service and a precise timing control.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-203 · Observable Discrepancy