OSV-2020-1551 UNKNOWN WRITE in CFF::parsed_cs_op_t::set_skip
Not scored
Published
Check this codebase for OSV-2020-1551 and fix it if it is affected.
What it is: OSV-2020-1551 is a memory corruption vulnerability in harfbuzz, published on 31 Jul 2020.
Exploitation: There is no known exploitation of OSV-2020-1551 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-2020-1551/ (Markdown: https://insights.sbomify.com/OSV-2020-1551/index.md)
A memory corruption vulnerability in the CFF font parser allows attackers to cause a crash or potentially execute arbitrary code via malicious font files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2020-1551?
OSV-2020-1551 is a memory corruption vulnerability in harfbuzz, published on 31 Jul 2020.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24507
Crash type: UNKNOWN WRITE
Crash state:
CFF::parsed_cs_op_t::set_skip
CFF::parsed_cs_str_t::add_call_op
cff1_cs_opset_subr_subset_t::process_call_subr
Which versions are affected by OSV-2020-1551?
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-2020-1551?
No fix has been published for OSV-2020-1551 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-2020-1551 being exploited?
There is no known exploitation of OSV-2020-1551 in the wild and no public exploit code.