OSV-2021-766 Negative-size-param in frame_get_vlmetalayers
Not scored
Published
Check this codebase for OSV-2021-766 and fix it if it is affected.
What it is: OSV-2021-766 is a vulnerability in c-blosc2, published on 15 May 2021.
Exploitation: There is no known exploitation of OSV-2021-766 in the wild and no public exploit code.
Affected packages and fixed versions:
- c-blosc2 (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-2021-766/ (Markdown: https://insights.sbomify.com/OSV-2021-766/index.md)
A negative size parameter in frame_get_vlmetalayers can cause a crash, leading to denial of service in applications using the Blosc2 library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-766?
OSV-2021-766 is a vulnerability in c-blosc2, published on 15 May 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34259
Crash type: Negative-size-param
Crash state:
frame_get_vlmetalayers
frame_to_schunk
blosc2_schunk_from_buffer
Which versions are affected by OSV-2021-766?
1 open source package ship an affected version, including c-blosc2.
| Package | Affected | Fixed in |
|---|---|---|
c-blosc2 OSS-Fuzz | All versions | None |
How do I fix OSV-2021-766?
No fix has been published for OSV-2021-766 yet. Limit exposure of the affected software until one is available.
Is OSV-2021-766 being exploited?
There is no known exploitation of OSV-2021-766 in the wild and no public exploit code.