/usr/share/kde4/services/ScreenSavers/ is in rss-glx 0.9.1-6.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/services/ScreenSavers/biof.desktop
/usr/share/kde4/services/ScreenSavers/busyspheres.desktop
/usr/share/kde4/services/ScreenSavers/colorfire.desktop
/usr/share/kde4/services/ScreenSavers/cyclone.desktop
/usr/share/kde4/services/ScreenSavers/drempels.desktop
/usr/share/kde4/services/ScreenSavers/euphoria.desktop
/usr/share/kde4/services/ScreenSavers/feedback.desktop
/usr/share/kde4/services/ScreenSavers/fieldlines.desktop
/usr/share/kde4/services/ScreenSavers/flocks.desktop
/usr/share/kde4/services/ScreenSavers/flux.desktop
/usr/share/kde4/services/ScreenSavers/helios.desktop
/usr/share/kde4/services/ScreenSavers/hufo_smoke.desktop
/usr/share/kde4/services/ScreenSavers/hufo_tunnel.desktop
/usr/share/kde4/services/ScreenSavers/hyperspace.desktop
/usr/share/kde4/services/ScreenSavers/lattice.desktop
/usr/share/kde4/services/ScreenSavers/lorenz.desktop
/usr/share/kde4/services/ScreenSavers/matrixview.desktop
/usr/share/kde4/services/ScreenSavers/pixelcity.desktop
/usr/share/kde4/services/ScreenSavers/plasma.desktop
/usr/share/kde4/services/ScreenSavers/skyrocket.desktop
/usr/share/kde4/services/ScreenSavers/solarwinds.desktop
/usr/share/kde4/services/ScreenSavers/spirographx.desktop
/usr/share/kde4/services/ScreenSavers/sundancer2.desktop