Light Display Manager (aka LightDM) 1.4.x before 1.4.3, 1.6.x before 1.6.2, and 1.7.x before 1.7.14 uses 0664 permissions for the temporary .Xauthority file, which allows local users to obtain sensitive information by reading the file.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Lightdm | Robert_ancell | 1.4.0 (including) | 1.4.0 (including) |
| Lightdm | Robert_ancell | 1.4.1 (including) | 1.4.1 (including) |
| Lightdm | Robert_ancell | 1.4.2 (including) | 1.4.2 (including) |
| Lightdm | Robert_ancell | 1.6.0 (including) | 1.6.0 (including) |
| Lightdm | Robert_ancell | 1.6.1 (including) | 1.6.1 (including) |
| Lightdm | Robert_ancell | 1.7.0 (including) | 1.7.0 (including) |
| Lightdm | Robert_ancell | 1.7.1 (including) | 1.7.1 (including) |
| Lightdm | Robert_ancell | 1.7.2 (including) | 1.7.2 (including) |
| Lightdm | Robert_ancell | 1.7.3 (including) | 1.7.3 (including) |
| Lightdm | Robert_ancell | 1.7.4 (including) | 1.7.4 (including) |
| Lightdm | Robert_ancell | 1.7.5 (including) | 1.7.5 (including) |
| Lightdm | Robert_ancell | 1.7.6 (including) | 1.7.6 (including) |
| Lightdm | Robert_ancell | 1.7.7 (including) | 1.7.7 (including) |
| Lightdm | Robert_ancell | 1.7.8 (including) | 1.7.8 (including) |
| Lightdm | Robert_ancell | 1.7.9 (including) | 1.7.9 (including) |
| Lightdm | Robert_ancell | 1.7.10 (including) | 1.7.10 (including) |
| Lightdm | Robert_ancell | 1.7.11 (including) | 1.7.11 (including) |
| Lightdm | Robert_ancell | 1.7.12 (including) | 1.7.12 (including) |
| Lightdm | Robert_ancell | 1.7.13 (including) | 1.7.13 (including) |
| Lightdm | Ubuntu | raring | * |
| Lightdm | Ubuntu | upstream | * |