ALBA-2022:1564 gdm bug fix and enhancement update
Not scored
Published
Check this codebase for ALBA-2022:1564 and fix it if it is affected.
What it is: ALBA-2022:1564 is a vulnerability in gdm, published on 26 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of ALBA-2022:1564 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-2022-1564/ (Markdown: https://insights.sbomify.com/ALBA-2022-1564/index.md)
GDM ignores the DisallowTCP setting, potentially exposing the login screen to network access if configured to allow it.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is ALBA-2022:1564?
ALBA-2022:1564 is a vulnerability in gdm, published on 26 Apr 2022. An attacker can exploit it over the internet without logging in, 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):
- "DisallowTCP=false" option is not being used by /etc/gdm/custom.conf file (BZ#2029202)
Which versions are affected by ALBA-2022:1564?
Linux distribution packages (1)
gdm AlmaLinux:8 | All versions | 1:40.0-15.el8_5.3 |
How do I fix ALBA-2022:1564?
Apply the vendor's patch.
Is ALBA-2022:1564 being exploited?
There is no known exploitation of ALBA-2022:1564 in the wild and no public exploit code.