ALBA-2022:0884 gdm bug fix and enhancement update
Not scored
Published
Check this codebase for ALBA-2022:0884 and fix it if it is affected.
What it is: ALBA-2022:0884 is a denial of service vulnerability in gdm, published on 15 Mar 2022. 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-2022:0884 in the wild and no public exploit code.
Affected product: gdm. 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-2022-0884/ (Markdown: https://insights.sbomify.com/ALBA-2022-0884/index.md)
A bug in GDM causes crashes preventing GUI login, resulting in a denial of service for local users.
- 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-2022:0884?
ALBA-2022:0884 is a denial of service vulnerability in gdm, published on 15 Mar 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The GNOME Display Manager (GDM) provides the graphical login screen. The screen is shown shortly after boot, after log out, and when switching the current user.
Bug Fix(es) and Enhancement(s):
- gdm crashed in ensure_display_for_seat(), can't login to the GUI (BZ#2036584)
Which versions are affected by ALBA-2022:0884?
Linux distribution packages (1)
gdm AlmaLinux:8 | All versions | 1:40.0-15.el8_5.1 |
How do I fix ALBA-2022:0884?
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-2022:0884 being exploited?
There is no known exploitation of ALBA-2022:0884 in the wild and no public exploit code.