ALBA-2021:1994 corosync bug fix and enhancement update
Not scored
Published
Check this codebase for ALBA-2021:1994 and fix it if it is affected.
What it is: ALBA-2021:1994 is a denial of service vulnerability in corosync, published on 18 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of ALBA-2021:1994 in the wild and no public exploit code.
Affected product: corosync. No package-level version data is available, so check the vendor advisory linked from the reference page.
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/ALBA-2021-1994/ (Markdown: https://insights.sbomify.com/ALBA-2021-1994/index.md)
Attackers can cause a denial of service in Corosync cluster software when compression is enabled, requiring a patch update.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is ALBA-2021:1994?
ALBA-2021:1994 is a denial of service vulnerability in corosync, published on 18 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The corosync packages provide the Corosync Cluster Engine and C APIs for AlmaLinux cluster software.
Bug Fix(es) and Enhancement(s):
- corosync crash with compression enabled (BZ#1951049)
Which versions are affected by ALBA-2021:1994?
Linux distribution packages (4)
corosync AlmaLinux:8 | All versions | 3.1.0-3.el8_4.1 |
corosync-vqsim AlmaLinux:8 | All versions | 3.1.0-3.el8_4.1 |
corosynclib-devel AlmaLinux:8 | All versions | 3.1.0-3.el8_4.1 |
spausedd AlmaLinux:8 | All versions | 3.1.0-3.el8_4.1 |
How do I fix ALBA-2021:1994?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is ALBA-2021:1994 being exploited?
There is no known exploitation of ALBA-2021:1994 in the wild and no public exploit code.