SUSE-SU-2021:1580-1 Security update for xen
Not scored
Published
Check this codebase for SUSE-SU-2021:1580-1 and fix it if it is affected.
What it is: SUSE-SU-2021:1580-1 is a denial of service vulnerability in xen, published on 12 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 SUSE-SU-2021:1580-1 in the wild and no public exploit code.
Affected product: xen. 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/SUSE-SU-2021-1580-1/ (Markdown: https://insights.sbomify.com/SUSE-SU-2021-1580-1/index.md)
A regression in xenstored.service caused by systemd updates could lead to service tracking failures and potential denial of service.
- 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 SUSE-SU-2021:1580-1?
SUSE-SU-2021:1580-1 is a denial of service vulnerability in xen, published on 12 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This update for xen fixes the following issues:
- A recent systemd update caused a regression in 'xenstored.service' systemd now fails to track units that use systemd-notify. (bsc#1183790)
- Add a fix to delay between the call to 'systemd-notify' and the final exit of the wrapper script. (bsc#1185021, bsc#1185196)
- Run xenstored in a separeately, which will make processing of large and/or concurrent batches of xenstore accesses more robust. (fate#323663)
Which versions are affected by SUSE-SU-2021:1580-1?
Linux distribution packages (3)
xen SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.12.4_10-3.42.1 |
xen SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.12.4_10-3.42.1 |
xen SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 4.12.4_10-3.42.1 |
How do I fix SUSE-SU-2021:1580-1?
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 SUSE-SU-2021:1580-1 being exploited?
There is no known exploitation of SUSE-SU-2021:1580-1 in the wild and no public exploit code.