CVE-2020-21535 Null dereference in n/a
Medium 5.5
Published
Updated
Check this codebase for CVE-2020-21535 and fix it if it is affected.
What it is: CVE-2020-21535 is a medium-severity vulnerability in Debian Debian Linux, published on 16 Sep 2021. 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: There is no known exploitation of CVE-2020-21535 in the wild and no public exploit code.
Affected product: Debian Debian Linux. 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-2020-21535/ (Markdown: https://insights.sbomify.com/CVE-2020-21535/index.md)
A segmentation fault in fig2dev allows attackers to cause a denial of service via crafted input.
- 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-2020-21535?
CVE-2020-21535 is a medium-severity vulnerability in Debian Debian Linux, published on 16 Sep 2021. 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
fig2dev 3.2.7b contains a segmentation fault in the gencgm_start function in gencgm.c.
Weakness: CWE-125
Which versions are affected by CVE-2020-21535?
It affects 2 products.
Products include Debian Debian Linux, Xfig Project Fig2dev.
How do I fix CVE-2020-21535?
Upgrade to a fixed version.
Is CVE-2020-21535 being exploited?
There is no known exploitation of CVE-2020-21535 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-21535, GHSA-4rpw-4qwc-w2fm, UBUNTU-CVE-2020-21535.