/usr/share/opencv/haarcascades/ is in opencv-data 3.2.0+dfsg-4build2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/opencv/haarcascades/haarcascade_eye.xml
/usr/share/opencv/haarcascades/haarcascade_eye_tree_eyeglasses.xml
/usr/share/opencv/haarcascades/haarcascade_frontalcatface.xml
/usr/share/opencv/haarcascades/haarcascade_frontalcatface_extended.xml
/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml
/usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml
/usr/share/opencv/haarcascades/haarcascade_frontalface_alt_tree.xml
/usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml
/usr/share/opencv/haarcascades/haarcascade_fullbody.xml
/usr/share/opencv/haarcascades/haarcascade_lefteye_2splits.xml
/usr/share/opencv/haarcascades/haarcascade_licence_plate_rus_16stages.xml
/usr/share/opencv/haarcascades/haarcascade_lowerbody.xml
/usr/share/opencv/haarcascades/haarcascade_profileface.xml
/usr/share/opencv/haarcascades/haarcascade_righteye_2splits.xml
/usr/share/opencv/haarcascades/haarcascade_russian_plate_number.xml
/usr/share/opencv/haarcascades/haarcascade_smile.xml
/usr/share/opencv/haarcascades/haarcascade_upperbody.xml