Sportal.co.nz 25.Feb.2013Getty Images
Greig Laidlaw scored all of the hosts' points at Murrayfield, converting four penalties as Scotland came from behind for their second win in three matches this campaign.
Ireland held an eight-point lead thanks to a Craig Gilroy try and Paddy Jackson penalty, but Scotland fought back, condemning them to their second straight loss.
Scotland are third on the table after the win, while Ireland, who had 80 percent of the possession, sit fourth.
Debutant Jackson landed one of three penalties and missed his conversion attempt, with Ireland getting their first chance when Scotland prop Ryan Grant was sin-binned in the 15th minute.
Jackson's penalty attempt drifted wide before he got the visitors on the scoreboard with his next attempt from inside 22 metres in the 35th minute.
Stuart Hogg had Scotland's first chance with the boot just before half-time, but his long-range effort fell short as Ireland held a 3-0 half-time lead.
Declan Kidney's men extended their lead three minutes after the break.
Flanker Sean O'Brien made the initial break and Gilroy crashed over from close range to make it 8-0, with Jackson missing the conversion.
Scotland were back in the game courtesy of their forwards, who landed Laidlaw two penalty goals as he cut the lead to two points as Jackson missed yet another chance.
Interim coach Scott Johnson's men were ahead for the first time in the 63rd minute and Laidlaw extended their advantage as they secured a gutsy win.