CVE-2021-3336 DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED2251
High 8.1
Published
Updated
Check this codebase for CVE-2021-3336 and fix it if it is affected.
What it is: CVE-2021-3336 is a high-severity vulnerability in Wolfssl Wolfssl, published on 29 Jan 2021.
Exploitation: There is no known exploitation of CVE-2021-3336 in the wild and no public exploit code.
Affected product: Wolfssl Wolfssl. 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-2021-3336/ (Markdown: https://insights.sbomify.com/CVE-2021-3336/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2021-3336?
CVE-2021-3336 is a high-severity vulnerability in Wolfssl Wolfssl, published on 29 Jan 2021.
Official description
DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED22519, ED448, ECC, or RSA signature without the corresponding certificate). The client side is affected because man-in-the-middle attackers can impersonate TLS 1.3 servers.
Weakness: CWE-295
Which versions are affected by CVE-2021-3336?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2021-3336?
Upgrade to a fixed version.
Is CVE-2021-3336 being exploited?
There is no known exploitation of CVE-2021-3336 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2021-3336, GHSA-qfqh-45q8-8425, UBUNTU-CVE-2021-3336.