CVE-2021-3798

Name: CVE-2021-3798
Creator: NVD / NIST
Published: 2022-08-23T16:15:09.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2021-3798 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.26%

17.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Opencryptoki Project	Opencryptoki	< 3.17.0

References

https://access.redhat.com/security/cve/CVE-2021-3798Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1990591Issue Tracking, Patch, Third Party Advisory
https://github.com/opencryptoki/opencryptoki/commit/4e3b43c3d8844402c04a66b55c6c940f965109f0Patch, Third Party Advisory
https://github.com/opencryptoki/opencryptoki/pull/402Patch, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3798Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1990591Issue Tracking, Patch, Third Party Advisory
https://github.com/opencryptoki/opencryptoki/commit/4e3b43c3d8844402c04a66b55c6c940f965109f0Patch, Third Party Advisory
https://github.com/opencryptoki/opencryptoki/pull/402Patch, Third Party Advisory

Timeline

Published: Aug 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3798?

How severe is CVE-2021-3798?

CVE-2021-3798 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3798?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3798?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST