OSV-2020-1683 UNKNOWN READ in zend_gc_delref
Not scored
Published
Check this codebase for OSV-2020-1683 and fix it if it is affected.
What it is: OSV-2020-1683 is a memory corruption vulnerability in php, published on 1 Sep 2020.
Exploitation: There is no known exploitation of OSV-2020-1683 in the wild and no public exploit code.
Affected packages and fixed versions:
- php (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-2020-1683/ (Markdown: https://insights.sbomify.com/OSV-2020-1683/index.md)
An unknown read vulnerability in the PHP garbage collector can cause a crash, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is OSV-2020-1683?
OSV-2020-1683 is a memory corruption vulnerability in php, published on 1 Sep 2020.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25321
Crash type: UNKNOWN READ
Crash state:
zend_gc_delref
zval_delref_p
zval_ptr_dtor_nogc
Which versions are affected by OSV-2020-1683?
1 open source package ship an affected version, including php.
| Package | Affected | Fixed in |
|---|---|---|
php OSS-Fuzz | All versions | None |
How do I fix OSV-2020-1683?
No fix has been published for OSV-2020-1683 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-2020-1683 being exploited?
There is no known exploitation of OSV-2020-1683 in the wild and no public exploit code.