Position the first furring strip vertically, flat against the cinder block wall and butted into the corner.
Drill one 3/16-inch hole through the furring strip about every 12 inches from top to bottom, staggering the holes along the furring strip. Use an electric drill with a 3/16-inch carbide-tipped masonry bit to make the holes.
Drive 1/4-inch concrete screws into the furring strips holes to secure the furring strips to the cinder block wall. Use a hammer drill. Make the heads of the screws flush with the surface of the furring strips.
Place the second furring strip against the cinder block wall either 16 or 24 inches from the center of the first furring strip. Attach the second furring strip to the wall in the same manner you attached the first furring strip.
Repeat the process to attach additional furring strips to the cinder block wall.