CVE-2021-39251 Null dereference in n/a
Medium 6.7
Published
Updated
Check this codebase for CVE-2021-39251 and fix it if it is affected.
What it is: CVE-2021-39251 is a medium-severity vulnerability in Debian Debian Linux, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-39251 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-2021-39251/ (Markdown: https://insights.sbomify.com/CVE-2021-39251/index.md)
A crafted NTFS image causes a NULL pointer dereference in NTFS-3G, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-39251?
CVE-2021-39251 is a medium-severity vulnerability in Debian Debian Linux, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G < 2021.8.22.
Which versions are affected by CVE-2021-39251?
It affects 4 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Redhat Enterprise Linux, Tuxera Ntfs-3g.
How do I fix CVE-2021-39251?
Upgrade to a fixed version.
Is CVE-2021-39251 being exploited?
There is no known exploitation of CVE-2021-39251 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-6756, DEBIAN-CVE-2021-39251, GHSA-rwpj-m8w9-33j2, UBUNTU-CVE-2021-39251.