OSV-2020-1240 Use-of-uninitialized-value in jbig2_decode_mmr_line
Not scored
Published
Check this codebase for OSV-2020-1240 and fix it if it is affected.
What it is: OSV-2020-1240 is a vulnerability in jbig2dec, published on 22 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of OSV-2020-1240 in the wild and no public exploit code.
Affected packages and fixed versions:
- jbig2dec (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-2020-1240/ (Markdown: https://insights.sbomify.com/OSV-2020-1240/index.md)
A use-of-uninitialized-value bug in the JBIG2 decoder can cause a crash when processing malicious images, affecting applications using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2020-1240?
OSV-2020-1240 is a vulnerability in jbig2dec, published on 22 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17855
Crash type: Use-of-uninitialized-value
Crash state:
jbig2_decode_mmr_line
jbig2_decode_halftone_mmr
jbig2_decode_gray_scale_image
Which versions are affected by OSV-2020-1240?
1 open source package ship an affected version, including jbig2dec.
| Package | Affected | Fixed in |
|---|---|---|
jbig2dec OSS-Fuzz | All versions | None |
How do I fix OSV-2020-1240?
No fix has been published for OSV-2020-1240 yet. Limit exposure of the affected software until one is available.
Is OSV-2020-1240 being exploited?
There is no known exploitation of OSV-2020-1240 in the wild and no public exploit code.