Derry battle to earn a point after withstanding sustained Cork pressure in the second half.
Mark McNulty tipped over a dipping strike from Ally Gilchrist just after the interval.
A disappointing first half of few chances ended with defences on top at Turners Cross.
Cork defender Shane Griffin came closest to an opener on 34 minutes when his shot clipped the Candystripes woodwork.
Cork City: McNulty, McLoughlin, Morrisey, McCormack, Buckley, D O'Connor, Sheppard (capt), Griffin, McCarthy, Casey, Nash.
Subs: Ryan, Horgan, Rainsford, Tilley, K O'Connor, Smith, Comerford.
Derry City: Cherrie, Harkin, Sloggett, Parkhouse, McCrudden, Ogedi-Uzokwe, Toal, McClean, Cole, Gilchrist, McNamee (capt).
Subs: Gartside, Bruna, Delap, Stokes, Kerr, Seraf, Coll.