# ALBA-2021:5233: gnome-shell-extensions bug fix and enhancement update

> A bug in GNOME Shell extensions causes the desktop icons extension to consume mouse events, leading to a denial of service for user interaction.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 21 Dec 2021

## What is ALBA-2021:5233?

ALBA-2021:5233 is a vulnerability in gnome-classic-session, published on 21 Dec 2021. 

### Official description

GNOME Shell extensions allow for modifying the default GNOME Shell
interface and its parts, such as window management and application
launching.

Bug Fix(es) and Enhancement(s):

* Disable unfullscreen gesture or a function to switch between normal mode
and fullscreen mode (BZ#2009192)

* Desktop icons extension sometimes gets confused about grab state and
starts eating most mouse events (BZ#2019405)

## Which versions are affected by ALBA-2021:5233?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gnome-classic-session` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-apps-menu` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-auto-move-windows` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-common` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-dash-to-dock` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-desktop-icons` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-disable-screenshield` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-drive-menu` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-gesture-inhibitor` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-heads-up-display` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-horizontal-workspaces` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-launch-new-instance` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-native-window-placement` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-no-hot-corner` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-panel-favorites` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-places-menu` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-screenshot-window-sizer` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-systemMonitor` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-top-icons` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-updates-dialog` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-user-theme` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-window-grouper` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-window-list` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-windowsNavigator` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |
| `gnome-shell-extension-workspace-indicator` | AlmaLinux:8 | All versions | 3.32.1-22.el8_5 |

## How do I fix ALBA-2021:5233?

Apply the vendor's patch.

## Is ALBA-2021:5233 being exploited?

There is no known exploitation of ALBA-2021:5233 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for ALBA-2021:5233 and fix it if it is affected.

What it is: ALBA-2021:5233 is a vulnerability in gnome-classic-session, published on 21 Dec 2021. 
Exploitation: There is no known exploitation of ALBA-2021:5233 in the wild and no public exploit code.

Affected product: gnome-classic-session. 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-2021-5233/ (Markdown: https://insights.sbomify.com/ALBA-2021-5233/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/ALBA-2021:5233

---
From sbomify Insights: https://insights.sbomify.com/ALBA-2021-5233/
Summaries are generated and may contain mistakes; the official description above is the record.