OSV-2023-344 Heap-buffer-overflow in tok_get_normal_mode
Not scored
Published
Check this codebase for OSV-2023-344 and fix it if it is affected.
What it is: OSV-2023-344 is a memory corruption vulnerability in cpython3, published on 25 Apr 2023.
Exploitation: There is no known exploitation of OSV-2023-344 in the wild and no public exploit code.
Affected packages and fixed versions:
- cpython3 (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-2023-344/ (Markdown: https://insights.sbomify.com/OSV-2023-344/index.md)
A heap buffer overflow in the Python tokenizer allows attackers to cause denial of service or potentially execute arbitrary code via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2023-344?
OSV-2023-344 is a memory corruption vulnerability in cpython3, published on 25 Apr 2023.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58295
Crash type: Heap-buffer-overflow WRITE 1
Crash state:
tok_get_normal_mode
_PyTokenizer_Get
_PyPegen_tokenize_full_source_to_check_for_errors
Which versions are affected by OSV-2023-344?
1 open source package ship an affected version, including cpython3.
| Package | Affected | Fixed in |
|---|---|---|
cpython3 OSS-Fuzz | All versions | None |
How do I fix OSV-2023-344?
No fix has been published for OSV-2023-344 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-2023-344 being exploited?
There is no known exploitation of OSV-2023-344 in the wild and no public exploit code.