Description
GNOME Display Manager (gdm) 3.4.1 and earlier, when disable-user-list is set to true, allows local users to cause a denial of service (unable to login) by pressing the cancel button after entering a user name.
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 | gdm3 | 3.8.3-1 | — |
| Debian 13 | gdm3 | 3.8.3-1 | — |
| Debian 12 | gdm3 | 3.8.3-1 | — |
References
- [oss-security] 20140107 CVE Re: request: lightdm-gtk-greeter - local DOS due to NULL pointer dereference mailing-list
- https://bugzilla.gnome.org/show_bug.cgi?id=704284
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683338
- [oss-security] 20140107 CVE Re: request: lightdm-gtk-greeter - local DOS due to NULL pointer dereference mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1050745