OSV-2021-664 Heap-use-after-free in module_check_cast
Not scored
Published
Check this codebase for OSV-2021-664 and fix it if it is affected.
What it is: OSV-2021-664 is an use after free vulnerability in irssi, published on 21 Apr 2021.
Exploitation: There is no known exploitation of OSV-2021-664 in the wild and no public exploit code.
Affected packages and fixed versions:
- irssi (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-2021-664/ (Markdown: https://insights.sbomify.com/OSV-2021-664/index.md)
A heap-use-after-free vulnerability in module_check_cast allows attackers to potentially execute arbitrary code or cause 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-2021-664?
OSV-2021-664 is an use after free vulnerability in irssi, published on 21 Apr 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33444
Crash type: Heap-use-after-free READ 4
Crash state:
module_check_cast
server_connect_unref
server_unref
Which versions are affected by OSV-2021-664?
1 open source package ship an affected version, including irssi.
| Package | Affected | Fixed in |
|---|---|---|
irssi OSS-Fuzz | All versions | None |
How do I fix OSV-2021-664?
No fix has been published for OSV-2021-664 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2021-664 being exploited?
There is no known exploitation of OSV-2021-664 in the wild and no public exploit code.