OSV-2021-401 Segv on unknown address in us_internal_dispatch_ready_poll
Not scored
Published
Check this codebase for OSV-2021-401 and fix it if it is affected.
What it is: OSV-2021-401 is a memory corruption vulnerability in uwebsockets, published on 16 Feb 2021.
Exploitation: There is no known exploitation of OSV-2021-401 in the wild and no public exploit code.
Affected packages and fixed versions:
- uwebsockets (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-2021-401/ (Markdown: https://insights.sbomify.com/OSV-2021-401/index.md)
A segmentation fault in the uWebSockets library can cause a denial of service when processing ready poll events.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-401?
OSV-2021-401 is a memory corruption vulnerability in uwebsockets, published on 16 Feb 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30951
Crash type: Segv on unknown address
Crash state:
us_internal_dispatch_ready_poll
us_loop_run
test
Which versions are affected by OSV-2021-401?
1 open source package ship an affected version, including uwebsockets.
| Package | Affected | Fixed in |
|---|---|---|
uwebsockets OSS-Fuzz | All versions | None |
How do I fix OSV-2021-401?
No fix has been published for OSV-2021-401 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-2021-401 being exploited?
There is no known exploitation of OSV-2021-401 in the wild and no public exploit code.