Tony Smeeth's side, who had both Martin Garvey and Forrest Gainer sin-binned, racked up a hat-trick of top flight stalemates as full-back Simon Mitchell was wayward with two late penalty attempts.
The students are just about keeping their heads above water - four points off the bottom - but coach Tony Smeeth can hardly blame former Ireland Universities kicker Mitchell for the late capitulation.
Mitchell's four previous penalties were crucial for DU's seven-point lead and the full-back has bagged 66 points in eight starts.
Former Ireland Under-21 team mates Jamie Heaslip and Dave Gannon brought 'Rock back into it, after Trinity right wing Philip Howard had touched down in the first half. The latter crossed with five minutes remaining to allow Conor Kilroy - already the kicker of four penalties - the chance to convert, and level at 19-apiece.
At Eaton Park, Paddy Wallace was the kicking king as his two first-half penalties gifted Ballymena a 6-5 derby win over Belfast Harlequins.
Ian Humphreys grabbed a superb solo try in the final quarter, but with his late drop goal attempt sailing wide, 'Quins six-game winning run was halted.
At Oak Park, champions Shannon stuttered to a 17-7 defeat of bottom side County Carlow, with Munster hooker Jerry Flannery's 79th-minute try the difference.
Ray Ward's strugglers led 7-6 at the break thanks to a Kent Ashmore try on 15 minutes, from a five-metre lineout drive.
Richie Murphy converted, but the multi-talented kicker was held at bay in the second half as the Limerick men came into their own.
Veteran Andrew Thompson - six times an AIL winner - took over the kicking duties for the visitors due to the late withdrawal of David Delaney, and he kicked three penalties before his 84th-minute fourth cruelly robbed the midlanders of a bonus point.
Clontarf - who Shannon meet at Thomond Park next, on March 26 - sit top of the pile after Galwegians surrendered a 16-3 half-time lead to them at Crowley Park.
The north Dubliners racked up a 25-16 success, and their fifth bonus point in nine games as Warren O'Kelly, Conor Mahony and substitutes Simon O'Donnell and Darragh O'Shea breached the home side's line.
Garryowen number 10 Billy Treacy was the man-of-the-hour at Stevenson Park, as they plundered a 24-21 decision for the trip back home.
He grabbed a late try to deny 'Gannon their second straight win, after Jeremy Davidson's side had led through Gillan Carruthers' early converted try and a John McGuckin penalty.
A second touch down arrived in the second half for Carruthers as 'Gannon claimed a second bonus point of the season.
Eoghan Hickey was back on form for UCD as they fended off the advances of last season's semi-finalists Buccaneers 29-20 at Dubarry Park.
The mercurial fly-half kicked four penalties, adding to his opening drop goal, and converted tries from James Norton and Louis Burke as John McClean's side condemned Buccs to their fourth straight defeat of 2005.
Cork Constitution full-back Conrad O'Sullivan also grabbed a try double at Temple Hill, as they continued their fine form with a 22-11 dismissal of Lansdowne.
Rory Collins was also on target for Brian Walsh's men.
AIB League: Saturday, February 5 Results
Ballymena 6 Belfast Harlequins 5, Eaton ParkBlackrock College 19 Dublin University 19, Stradbrook
Ballynahinch 6 St Mary's College 8, Ballymacarn ParkBective Rangers 20 Malone 13, DonnybrookDe La Salle Palmerston 11 Old Crescent 16, KilternanDolphin 34 Waterpark 12, Musgrave ParkHighfield 6 Barnhall 12, Woodleigh ParkMidleton 15 UCC 26, Towns ParkOld Belvedere 22 Terenure College 7, Anglesea RoadThomond 34 Young Munster 13, Fitzgerald Park
Ballina 8 Greystones 62, Heffernan ParkBanbridge 13 Sunday's Well 19, Rifle ParkBruff 20 Ards 24, Kilballyowen ParkCity of Derry 20 Queen's University 12, Judge's RoadClonakilty 22 Wanderers 12, Shannonvale CrossCorinthians 11 Suttonians 16, Corinthian ParkInstonians 52 Skerries 21, Shaw's BridgePortadown 29 Old Wesley 0, Chambers Park