CVE-2020-21834 Null dereference in n/a
Medium 6.5
Published
Updated
Check this codebase for CVE-2020-21834 and fix it if it is affected.
What it is: CVE-2020-21834 is a medium-severity vulnerability in Gnu Libredwg, published on 17 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-21834 in the wild and no public exploit code.
Affected product: Gnu Libredwg. 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-2020-21834/ (Markdown: https://insights.sbomify.com/CVE-2020-21834/index.md)
A null pointer dereference in GNU LibreDWG allows attackers to cause a denial of service via a crafted DWG file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-21834?
CVE-2020-21834 is a medium-severity vulnerability in Gnu Libredwg, published on 17 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A null pointer deference issue exists in GNU LibreDWG 0.10 via get_bmp ../../programs/dwgbmp.c:164.
Weakness: CWE-476
Which versions are affected by CVE-2020-21834?
It affects 1 product.
Products include Gnu Libredwg.
How do I fix CVE-2020-21834?
No fix has been published for CVE-2020-21834 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-21834 being exploited?
There is no known exploitation of CVE-2020-21834 in the wild and no public exploit code.
Other vulnerabilities in Gnu Libredwg
Sources
Also known as GHSA-wfjj-gqw7-q2x8.