OSV-2021-735 Use-of-uninitialized-value in decode_CABAC_FL_bypass
Not scored
Published
Check this codebase for OSV-2021-735 and fix it if it is affected.
What it is: OSV-2021-735 is a vulnerability in kimageformats, published on 8 May 2021.
Exploitation: There is no known exploitation of OSV-2021-735 in the wild and no public exploit code.
Affected packages and fixed versions:
- kimageformats (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-2021-735/ (Markdown: https://insights.sbomify.com/OSV-2021-735/index.md)
A use-of-uninitialized-value bug in the CABAC decoder can cause crashes, potentially leading to denial of service in applications using the 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-2021-735?
OSV-2021-735 is a vulnerability in kimageformats, published on 8 May 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34047
Crash type: Use-of-uninitialized-value
Crash state:
decode_CABAC_FL_bypass
decode_coeff_abs_level_remaining
residual_coding
Which versions are affected by OSV-2021-735?
1 open source package ship an affected version, including kimageformats.
| Package | Affected | Fixed in |
|---|---|---|
kimageformats OSS-Fuzz | All versions | None |
How do I fix OSV-2021-735?
No fix has been published for OSV-2021-735 yet. Limit exposure of the affected software until one is available.
Is OSV-2021-735 being exploited?
There is no known exploitation of OSV-2021-735 in the wild and no public exploit code.