/usr/share/X11/xkb/symbols/sun_vndr/ is in xkb-data 2.10.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/X11/xkb/symbols/sun_vndr/ara
/usr/share/X11/xkb/symbols/sun_vndr/be
/usr/share/X11/xkb/symbols/sun_vndr/br
/usr/share/X11/xkb/symbols/sun_vndr/ca
/usr/share/X11/xkb/symbols/sun_vndr/ch
/usr/share/X11/xkb/symbols/sun_vndr/cz
/usr/share/X11/xkb/symbols/sun_vndr/de
/usr/share/X11/xkb/symbols/sun_vndr/dk
/usr/share/X11/xkb/symbols/sun_vndr/ee
/usr/share/X11/xkb/symbols/sun_vndr/es
/usr/share/X11/xkb/symbols/sun_vndr/fi
/usr/share/X11/xkb/symbols/sun_vndr/fr
/usr/share/X11/xkb/symbols/sun_vndr/gb
/usr/share/X11/xkb/symbols/sun_vndr/gr
/usr/share/X11/xkb/symbols/sun_vndr/it
/usr/share/X11/xkb/symbols/sun_vndr/jp
/usr/share/X11/xkb/symbols/sun_vndr/kr
/usr/share/X11/xkb/symbols/sun_vndr/lt
/usr/share/X11/xkb/symbols/sun_vndr/lv
/usr/share/X11/xkb/symbols/sun_vndr/nl
/usr/share/X11/xkb/symbols/sun_vndr/no
/usr/share/X11/xkb/symbols/sun_vndr/pl
/usr/share/X11/xkb/symbols/sun_vndr/pt
/usr/share/X11/xkb/symbols/sun_vndr/ro
/usr/share/X11/xkb/symbols/sun_vndr/ru
/usr/share/X11/xkb/symbols/sun_vndr/se
/usr/share/X11/xkb/symbols/sun_vndr/sk
/usr/share/X11/xkb/symbols/sun_vndr/solaris
/usr/share/X11/xkb/symbols/sun_vndr/tr
/usr/share/X11/xkb/symbols/sun_vndr/tw
/usr/share/X11/xkb/symbols/sun_vndr/ua
/usr/share/X11/xkb/symbols/sun_vndr/us