The victims were assaulted at the junction of Dalkeith Road and Nesbitt Street by a gang of boys aged about 14 at 21:45 on Tuesday, 9 June.
The 17-year-old suffered facial injuries and had to be taken to hospital, while his friends suffered minor injuries.
Police have appealed for witnesses.
Police have issued an appeal for information after a 17-year-old and his friends were attacked by a large group of younger teenagers in Dundee.