SUSE-SU-2021:1564-1 Security update for shim
Not scored
Published
Check this codebase for SUSE-SU-2021:1564-1 and fix it if it is affected.
What it is: SUSE-SU-2021:1564-1 is a vulnerability in shim, published on 11 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-2021:1564-1 in the wild and no public exploit code.
Affected product: shim. 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-2021-1564-1/ (Markdown: https://insights.sbomify.com/SUSE-SU-2021-1564-1/index.md)
An update to the shim bootloader addresses Secure Boot bypass issues by integrating SBAT support and EKU checks, requiring system administrators to apply the patch.
- 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-2021:1564-1?
SUSE-SU-2021:1564-1 is a vulnerability in shim, published on 11 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 shim fixes the following issues:
- Update to the unified shim binary for SBAT support (bsc#1182057)
- Merged EKU codesign check (bsc#1177315)
- shim-install: Always assume 'removable' for Azure to avoid the endless reset loop (bsc#1185464).
Which versions are affected by SUSE-SU-2021:1564-1?
Linux distribution packages (11)
shim SUSE:Enterprise Storage 6 | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise Micro 5.0 | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 15.4-3.20.1 |
shim SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 15.4-3.20.1 |
shim SUSE:Manager Proxy 4.0 | All versions | 15.4-3.20.1 |
shim SUSE:Manager Retail Branch Server 4.0 | All versions | 15.4-3.20.1 |
shim SUSE:Manager Server 4.0 | All versions | 15.4-3.20.1 |
How do I fix SUSE-SU-2021:1564-1?
Apply the vendor's patch.
Is SUSE-SU-2021:1564-1 being exploited?
There is no known exploitation of SUSE-SU-2021:1564-1 in the wild and no public exploit code.