Skip to content
Noroxi
NVD / CVE Program· CNA redhat

CVE-2021-3798: A flaw was found in openCryptoki.

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.28% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: opencryptoki (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4; opencryptoki-ccatok (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4; opencryptoki-ccatok-debuginfo (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4.

Low priority for now. Upgrade to opencryptoki (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4; opencryptoki-ccatok (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4; opencryptoki-ccatok-debuginfo (Red Hat:enterprise_linux:8::baseos) 0:3.15.1-6.el8_4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 23, 2022
Updated
Jun 17, 2026
EPSS
0.2% · 21th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-3798

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for opencryptoki project records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opencryptoki projectopencryptoki

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • opencryptoki project opencryptokibefore 3.17.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a opencryptoki

    • Fixed in v3.17.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:enterprise_linux:8::baseosopencryptokibefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-ccatokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-ccatok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-debugsourcebefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-ep11tokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-ep11tok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-icatokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-icatok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-icsftokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-icsftok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-libsbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-libs-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-swtokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-swtok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-tpmtokbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::baseosopencryptoki-tpmtok-debuginfobefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4
Red Hat:enterprise_linux:8::crbopencryptoki-develbefore 0:3.15.1-6.el8_40:3.15.1-6.el8_4

Same product

opencryptoki project: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-23893openCryptoki has improper link resolution before file access (link following)
    27Monitor
  • CVE-2026-40253openCryptoki: Memory safety vulnerabilities in BER/DER decoders in asn1.c
    24Monitor
  • CVE-2026-22791openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP
    24Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2012-4454Oct 10, 2012 · openCryptoki before 2.4.1, when using spinlocks, allows local users to create or set world-writable permissions on arbitrary files via a sym
    11Monitor
  • ← EarlierCVE-2012-4455Oct 10, 2012 · openCryptoki 2.4.1 allows local users to create or set world-writable permissions on arbitrary files via a symlink attack on the (1) LCK..op
    24Monitor
  • Later →CVE-2024-0914Jan 31, 2024 · Opencryptoki: timing side-channel in handling of rsa pkcs#1 v1.5 padded ciphertexts (marvin)
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:opencryptoki0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-ccatok0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-ccatok-debuginfo0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-debuginfo0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-debugsource0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-ep11tok0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-ep11tok-debuginfo0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-icatok0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-icatok-debuginfo0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-icsftok0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-icsftok-debuginfo0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:opencryptoki-libs0:3.15.1-6.el8_4 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

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

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records