It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Systemd | Systemd_project | * | 242 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | systemd-0:239-29.el8 | * |
| Systemd | Ubuntu | bionic | * |
| Systemd | Ubuntu | cosmic | * |
| Systemd | Ubuntu | disco | * |