CVE-2021-4110 NULL Pointer Dereference in mruby/mruby
Critical 9.1
Published
Updated
Check this codebase for CVE-2021-4110 and fix it if it is affected.
What it is: CVE-2021-4110 is a critical vulnerability in mruby/mruby, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-4110 in the wild and no public exploit code.
Affected product: mruby/mruby. 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-2021-4110/ (Markdown: https://insights.sbomify.com/CVE-2021-4110/index.md)
An attacker can cause a denial of service in applications using the mruby library via a NULL pointer dereference.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-4110?
CVE-2021-4110 is a critical vulnerability in mruby/mruby, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
mruby is vulnerable to NULL Pointer Dereference
Weakness: CWE-476
Which versions are affected by CVE-2021-4110?
It affects 1 product.
Linux distribution packages (1)
mruby openSUSE:Tumbleweed | All versions | 3.0.0-2.1 |
Products include Mruby Mruby.
How do I fix CVE-2021-4110?
Upgrade to a fixed version.
Is CVE-2021-4110 being exploited?
There is no known exploitation of CVE-2021-4110 in the wild and no public exploit code.
Other vulnerabilities in mruby/mruby
Sources
Also known as DEBIAN-CVE-2021-4110, GHSA-xvhr-qprg-rjpw, UBUNTU-CVE-2021-4110, openSUSE-SU-2024:11684-1.