OSV-2021-1693 Global-buffer-overflow in pdfi_fapi_get_glyph
Not scored
Published
Check this codebase for OSV-2021-1693 and fix it if it is affected.
What it is: OSV-2021-1693 is a memory corruption vulnerability in ghostscript, published on 14 Dec 2021.
Exploitation: There is no known exploitation of OSV-2021-1693 in the wild and no public exploit code.
Affected packages and fixed versions:
- ghostscript (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-2021-1693/ (Markdown: https://insights.sbomify.com/OSV-2021-1693/index.md)
A global buffer overflow in the PDF parsing library allows attackers to cause denial of service or potentially execute code via malicious PDF files.
- 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-2021-1693?
OSV-2021-1693 is a memory corruption vulnerability in ghostscript, published on 14 Dec 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42310
Crash type: Global-buffer-overflow READ {*}
Crash state:
pdfi_fapi_get_glyph
get_fapi_glyph_data
cff_slot_load
Which versions are affected by OSV-2021-1693?
1 open source package ship an affected version, including ghostscript.
| Package | Affected | Fixed in |
|---|---|---|
ghostscript OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1693?
No fix has been published for OSV-2021-1693 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-2021-1693 being exploited?
There is no known exploitation of OSV-2021-1693 in the wild and no public exploit code.