CVE-2021-3236 Null dereference in n/a
Medium 5.5
Published
Updated
Check this codebase for CVE-2021-3236 and fix it if it is affected.
What it is: CVE-2021-3236 is a medium-severity vulnerability in Vim Vim, published on 11 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3236 exists.
Affected product: Vim Vim. 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-2021-3236/ (Markdown: https://insights.sbomify.com/CVE-2021-3236/index.md)
Local attackers can cause a denial of service in Vim via a null pointer dereference in the ex_buffer_all method.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-3236?
CVE-2021-3236 is a medium-severity vulnerability in Vim Vim, published on 11 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
vim 8.2.2348 is affected by null pointer dereference, allows local attackers to cause a denial of service (DoS) via the ex_buffer_all method.
Weakness: CWE-476
Which versions are affected by CVE-2021-3236?
It affects 1 product.
Products include Vim Vim.
How do I fix CVE-2021-3236?
Upgrade to a fixed version.
Is CVE-2021-3236 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3236 exists.
Other vulnerabilities in Vim Vim
Sources
Also known as DEBIAN-CVE-2021-3236, GHSA-v2qw-7m3m-r9qx.