OSV-2021-679 Heap-buffer-overflow in strlcpy
Not scored
Published
Check this codebase for OSV-2021-679 and fix it if it is affected.
What it is: OSV-2021-679 is a memory corruption vulnerability in lxc, published on 23 Apr 2021.
Exploitation: There is no known exploitation of OSV-2021-679 in the wild and no public exploit code.
Affected packages and fixed versions:
- lxc (OSS-Fuzz): affected all versions; no fix listed
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/OSV-2021-679/ (Markdown: https://insights.sbomify.com/OSV-2021-679/index.md)
A heap-buffer-overflow in strlcpy within LXC parsing allows attackers to potentially execute code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is OSV-2021-679?
OSV-2021-679 is a memory corruption vulnerability in lxc, published on 23 Apr 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33556
Crash type: Heap-buffer-overflow WRITE {*}
Crash state:
strlcpy
parse_lxc_mntopts
set_config_rootfs_options
Which versions are affected by OSV-2021-679?
1 open source package ship an affected version, including lxc.
| Package | Affected | Fixed in |
|---|---|---|
lxc OSS-Fuzz | All versions | None |
How do I fix OSV-2021-679?
No fix has been published for OSV-2021-679 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2021-679 being exploited?
There is no known exploitation of OSV-2021-679 in the wild and no public exploit code.