OSV-2020-853 Use-of-uninitialized-value in llvm_ks::MCAssembler::computeFragmentSize
Not scored
Published
Check this codebase for OSV-2020-853 and fix it if it is affected.
What it is: OSV-2020-853 is a vulnerability in keystone, published on 14 Jul 2020.
Exploitation: There is no known exploitation of OSV-2020-853 in the wild and no public exploit code.
Affected packages and fixed versions:
- keystone (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-2020-853/ (Markdown: https://insights.sbomify.com/OSV-2020-853/index.md)
An attacker can cause a denial of service in the LLVM assembler by triggering a use-of-uninitialized-value error during fragment size computation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2020-853?
OSV-2020-853 is a vulnerability in keystone, published on 14 Jul 2020.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22482
Crash type: Use-of-uninitialized-value
Crash state:
llvm_ks::MCAssembler::computeFragmentSize
llvm_ks::MCAsmLayout::layoutFragment
llvm_ks::MCAsmLayout::ensureValid
Which versions are affected by OSV-2020-853?
1 open source package ship an affected version, including keystone.
| Package | Affected | Fixed in |
|---|---|---|
keystone OSS-Fuzz | All versions | None |
How do I fix OSV-2020-853?
No fix has been published for OSV-2020-853 yet. Limit exposure of the affected software until one is available.
Is OSV-2020-853 being exploited?
There is no known exploitation of OSV-2020-853 in the wild and no public exploit code.