OSV-2021-1206 Stack-use-after-scope in uprv_stricmp_70
Not scored
Published
Check this codebase for OSV-2021-1206 and fix it if it is affected.
What it is: OSV-2021-1206 is an use after free vulnerability in icu, published on 7 Sep 2021.
Exploitation: There is no known exploitation of OSV-2021-1206 in the wild and no public exploit code.
Affected packages and fixed versions:
- icu (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-2021-1206/ (Markdown: https://insights.sbomify.com/OSV-2021-1206/index.md)
A stack-use-after-scope vulnerability in the ICU library's string comparison function can cause a crash, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-1206?
OSV-2021-1206 is an use after free vulnerability in icu, published on 7 Sep 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38156
Crash type: Stack-use-after-scope READ 1
Crash state:
uprv_stricmp_70
ulocimp_getLanguage_70
_canonicalize
Which versions are affected by OSV-2021-1206?
1 open source package ship an affected version, including icu.
| Package | Affected | Fixed in |
|---|---|---|
icu OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1206?
No fix has been published for OSV-2021-1206 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2021-1206 being exploited?
There is no known exploitation of OSV-2021-1206 in the wild and no public exploit code.