A flaw was found in PackageKit. PackageKit skips the polkit authorization check for transactions carrying the SIMULATE (dry-run) flag. In the dnf5 backend, the RepoRemove handler ignores that contract and always executes the real transaction because its guard is written as (role == REPO_REMOVE || !SIMULATE), which is always true for RepoRemove. An unprivileged local user can therefore perform a genuine package uninstall while claiming to simulate. This vulnerability only affects systems using PackageKit with the dnf5 backend.

PackageKit-1.4.0-1.1 on GA media

Withdrawn by the publisher.

Affected: Ubuntu:Pro:16.04:LTS: packagekit, Ubuntu:Pro:18.04:LTS: packagekit, Ubuntu:Pro:20.04:LTS: packagekit, Ubuntu:22.04:LTS: packagekit, Ubuntu:24.04:LTS: packagekit, Ubuntu:26.04:LTS: packagekit

A flaw was found in PackageKit. PackageKit skips the polkit authorization check for transactions carrying the SIMULATE (dry-run) flag. In the dnf5 backend, the RepoRemove handler ignores that contract and always executes the real transaction because its guard is written as (role == REPO_REMOVE || !SIMULATE), which is always true for RepoRemove. An unprivileged local user can therefore perform a genuine package uninstall while claiming to simulate. This vulnerability only affects systems using PackageKit with the dnf5 backend.

Ein lokaler Angreifer kann mehrere Schwachstellen in PackageKit ausnutzen, um Sicherheitsmaßnahmen zu umgehen, beliebige Befehle mit Root-Rechten auszuführen, seine Berechtigungen auf Root zu erweitern oder Daten offenzulegen und zu manipulieren.