Description
LightDM before 1.0.6 allows local users to change ownership of arbitrary files via a symlink attack on ~/.Xauthority.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lightdm | 1.0.6-2 | — |
| Debian 13 | lightdm | 1.0.6-2 | — |
| Debian 12 | lightdm | 1.0.6-2 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | lightdm | 1.21.1-1.1 | openSUSE-SU-2024:10033-1 |
Advisories 1
- openSUSE-SU-2024:10033-1 liblightdm-gobject-1-0-1.21.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-1262-1 vendor-advisory
- [oss-security] 20111102 Re: Re: [LightDM] Version 1.0.6 released mailing-list
- [oss-security] 20111102 Re: Re: [LightDM] Version 1.0.6 released mailing-list
- [oss-security] 20111102 Re: [LightDM] Version 1.0.6 released mailing-list
- [LightDM] 20111102 Version 1.0.6 released mailing-list