CVE-2021-3798 Information disclosure in opencryptoki
Medium 5.5
Published
Updated
Check this codebase for CVE-2021-3798 and fix it if it is affected.
What it is: CVE-2021-3798 is a medium-severity vulnerability in opencryptoki, published on 23 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-3798 in the wild and no public exploit code.
Affected product: opencryptoki. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2021-3798/ (Markdown: https://insights.sbomify.com/CVE-2021-3798/index.md)
A flaw in openCryptoki allows malicious users to extract private keys via invalid curve attacks due to missing EC key validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3798?
CVE-2021-3798 is a medium-severity vulnerability in opencryptoki, published on 23 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2021-3798?
It affects 1 product.
Linux distribution packages (27)
opencryptoki Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ccatok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ccatok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ep11tok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ep11tok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icatok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icatok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icsftok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icsftok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-libs Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-swtok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-swtok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-tpmtok Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-tpmtok-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ccatok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-devel Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-ep11tok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icatok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-icsftok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-libs-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-swtok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
opencryptoki-tpmtok-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:3.15.1-6.el8_4 |
Products include Opencryptoki Project Opencryptoki.
How do I fix CVE-2021-3798?
Apply the vendor's patch.
Is CVE-2021-3798 being exploited?
There is no known exploitation of CVE-2021-3798 in the wild and no public exploit code.
Other vulnerabilities in opencryptoki
- CVE-2026-40253 openCryptoki: Memory safety vulnerabilities in BER/DER decoders in asn1.c
- CVE-2026-23893 openCryptoki has improper link resolution before file access (link following)
- CVE-2026-22791 openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP
- CVE-2012-4455 Path traversal in n/a
- CVE-2024-0914 Opencryptoki: timing side-channel in handling of rsa pkcs#1 v1.5 padded ciphertexts (marvin)
Sources
Also known as AZL-10659, GHSA-f2gp-jqv6-cmxg, RHBA-2021:3054, UBUNTU-CVE-2021-3798.