OSV-2017-39 Use-of-uninitialized-value in IsRelativeSymlinkSafe
Not scored
Published
Check this codebase for OSV-2017-39 and fix it if it is affected.
What it is: OSV-2017-39 is a vulnerability in unrar, published on 13 Jan 2021.
Exploitation: There is no known exploitation of OSV-2017-39 in the wild and no public exploit code.
Affected packages and fixed versions:
- unrar (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-2017-39/ (Markdown: https://insights.sbomify.com/OSV-2017-39/index.md)
An attacker can cause a denial of service via a use-of-uninitialized-value bug in symlink safety checks during archive extraction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2017-39?
OSV-2017-39 is a vulnerability in unrar, published on 13 Jan 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4308
Crash type: Use-of-uninitialized-value
Crash state:
IsRelativeSymlinkSafe
ExtractUnixLink30
ExtractSymlink
Which versions are affected by OSV-2017-39?
1 open source package ship an affected version, including unrar.
| Package | Affected | Fixed in |
|---|---|---|
unrar OSS-Fuzz | All versions | None |
How do I fix OSV-2017-39?
No fix has been published for OSV-2017-39 yet. Limit exposure of the affected software until one is available.
Is OSV-2017-39 being exploited?
There is no known exploitation of OSV-2017-39 in the wild and no public exploit code.