Description
gdk/gdkwindow.c in GTK+ before 2.18.5, as used in gnome-screensaver before 2.28.1, performs implicit paints on windows of type GDK_WINDOW_FOREIGN, which triggers an X error in certain circumstances and consequently allows physically proximate attackers to bypass screen locking and access an unattended workstation by pressing the Enter key many times.
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 | gtk+2.0 | 2.18.5-1 | — |
| Debian 13 | gtk+2.0 | 2.18.5-1 | — |
| Debian 12 | gtk+2.0 | 2.18.5-1 | — |
References
- 39317 third-party-advisory
- [oss-security] 20100212 CVE Request: gnome-screensaver termination by pressing "Enter" mailing-list
- [oss-security] 20100316 Re: Re: CVE Request: gnome-screensaver termination by pressing "Enter" mailing-list
- 38211 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=565527
- http://git.gnome.org/browse/gnome-screensaver/commit/?id=ab08cc93f2dc6223c8c00bfa1ca4f2d89069dbe0
- SUSE-SR:2010:008 vendor-advisory
- http://ftp.gnome.org/pub/gnome/sources/gtk+/2.18/gtk+-2.18.5.news
- MDVSA-2010:109 vendor-advisory
- http://git.gnome.org/browse/gnome-screensaver/commit/?h=gnome-2-28&id=98f8a22412cf388217fd5b88915eadd274d68520
- https://bugs.edge.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/446395
- https://bugzilla.gnome.org/show_bug.cgi?id=598476
- [oss-security] 20100305 Re: CVE Request: gnome-screensaver termination by pressing "Enter" mailing-list
- http://git.gnome.org/browse/gtk+/commit/?id=0748cf563d0d0d03001a62589f13be16a8ec06c1
- http://www.heise.de/newsticker/meldung/Gnome-Bildschirmsperre-in-OpenSuse-Linux-wirkungslos-2-Update-928580.html