OSV-2020-704 Heap-buffer-overflow in BEInt<unsigned char, 1>::set
Not scored
Published
Check this codebase for OSV-2020-704 and fix it if it is affected.
What it is: OSV-2020-704 is a memory corruption vulnerability in harfbuzz, published on 1 Jul 2020.
Exploitation: There is no known exploitation of OSV-2020-704 in the wild and no public exploit code.
Affected packages and fixed versions:
- harfbuzz (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-2020-704/ (Markdown: https://insights.sbomify.com/OSV-2020-704/index.md)
A heap buffer overflow in the font parsing library allows attackers to execute arbitrary code or cause denial of service via malicious fonts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2020-704?
OSV-2020-704 is a memory corruption vulnerability in harfbuzz, published on 1 Jul 2020.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13736
Crash type: Heap-buffer-overflow WRITE 1
Crash state:
BEInt<unsigned char, 1>::set
CFF::CFFIndex<OT::IntType<unsigned int, 4u> >::set_offset_at
bool CFF::FDArray<OT::IntType<unsigned int, 4u> >::serialize<CFF::cff2_font_dict
Which versions are affected by OSV-2020-704?
1 open source package ship an affected version, including harfbuzz.
| Package | Affected | Fixed in |
|---|---|---|
harfbuzz OSS-Fuzz | All versions | None |
How do I fix OSV-2020-704?
No fix has been published for OSV-2020-704 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-2020-704 being exploited?
There is no known exploitation of OSV-2020-704 in the wild and no public exploit code.