The X Display Manager Control Protocol (XDMCP) support for GDM before 2.4.1.6 allows attackers to cause a denial of service (daemon crash) via a short authorization key name.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gdm | Gnome | 2.2.0 (including) | 2.2.0 (including) |
| Gdm | Gnome | 2.4.1 (including) | 2.4.1 (including) |
| Gdm | Gnome | 2.4.1.1 (including) | 2.4.1.1 (including) |
| Gdm | Gnome | 2.4.1.2 (including) | 2.4.1.2 (including) |
| Gdm | Gnome | 2.4.1.3 (including) | 2.4.1.3 (including) |
| Gdm | Gnome | 2.4.1.4 (including) | 2.4.1.4 (including) |
| Gdm | Gnome | 2.4.1.5 (including) | 2.4.1.5 (including) |
| Gdm | Gnome | 2.4.1.6 (including) | 2.4.1.6 (including) |
| Kdebase | Redhat | 2.0_beta2.45 (including) | 2.0_beta2.45 (including) |
| Kdebase | Redhat | 2.2.3.1.20 (including) | 2.2.3.1.20 (including) |
| Kdebase | Redhat | 2.2.3.1.22 (including) | 2.2.3.1.22 (including) |
| Kdebase | Redhat | 2.4.0.7.13 (including) | 2.4.0.7.13 (including) |
| Kdebase | Redhat | 2.4.1.3.5 (including) | 2.4.1.3.5 (including) |
| Red Hat Enterprise Linux AS (Advanced Server) version 2.1 | RedHat | * | |
| Red Hat Enterprise Linux ES version 2.1 | RedHat | * | |
| Red Hat Enterprise Linux WS version 2.1 | RedHat | * | |
| Red Hat Linux 7.1 | RedHat | * | |
| Red Hat Linux 7.2 | RedHat | * | |
| Red Hat Linux 7.3 | RedHat | * | |
| Red Hat Linux 8.0 | RedHat | * | |
| Red Hat Linux 9 | RedHat | * | |
| Red Hat Linux Advanced Workstation 2.1 | RedHat | * |