Descriptiongdk/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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gtk+2.0 (PTS)stretch2.24.31-2fixed
bullseye, sid2.24.33-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gtk+2.0sourceetch(not affected)
gtk+2.0sourcelenny(not affected)


[lenny] - gtk+2.0 <not-affected> (issue only exposed by gnome-screensaver 2.28)
[etch] - gtk+2.0 <not-affected> (issue only exposed by gnome-screensaver 2.28)

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