OSV-2021-1786 Segv on unknown address in r_buf_free
Not scored
Published
Check this codebase for OSV-2021-1786 and fix it if it is affected.
What it is: OSV-2021-1786 is a memory corruption vulnerability in radare2, published on 31 Dec 2021.
Exploitation: There is no known exploitation of OSV-2021-1786 in the wild and no public exploit code.
Affected packages and fixed versions:
- radare2 (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-2021-1786/ (Markdown: https://insights.sbomify.com/OSV-2021-1786/index.md)
A segmentation fault in the buffer free function can cause a denial of service when processing malformed binary files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-1786?
OSV-2021-1786 is a memory corruption vulnerability in radare2, published on 31 Dec 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43092
Crash type: Segv on unknown address
Crash state:
r_buf_free
destroy
r_bin_file_free
Which versions are affected by OSV-2021-1786?
1 open source package ship an affected version, including radare2.
| Package | Affected | Fixed in |
|---|---|---|
radare2 OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1786?
No fix has been published for OSV-2021-1786 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-2021-1786 being exploited?
There is no known exploitation of OSV-2021-1786 in the wild and no public exploit code.