The visitors offered little in the way of an attacking threat for most of the contest but might have snatched victory as substitutes Mustapha Carayol and Curtis Main sparked a late rally.
Boro remain in the top six despite only winning one of their last eight npower Championship matches and boss Mowbray conceded to adopting a cautious approach in the midst of an injury-crisis, following consecutive four-goal losses away from home at Ipswich and Crystal Palace.
"From our perspective we've conceded too many goals on the road recently," he said.
"We've got a lot of injuries. I think it was 12 first-team players injured and I don't make any apologies for coming and making sure that we were defensively solid.
"A really hard-working team was picked and a lot of attacking threat was left on the bench to try and make sure we stayed in the game.
"I was pleased that we kept a clean sheet, that we worked extremely hard for each other - it's been a difficult month-and-a-half."