Indisciplined players will have no part in Dunga's national squad, Brazilian Football Confederation (CBF) president Ricardo Teixeira said on Monday.
"It's clear the attitude of a player counts and that's nothing new since (coach) Dunga took command of the team (after the 2006 World Cup)," Teixeira told a news conference.
"What happened in 2006 will certainly never happen again in terms of the Brazilian national team. You only learn when you suffer. I'll make the changes for that not to happen again."
Carlos Alberto Parreira's side were heavily criticised for their lax behaviour at the World Cup in Germany three years ago after being eliminated by France in the quarter-finals.
"Given the team we had, it was a great disappointment. There was a lack of fighting spirit," said Teixeira.
"It's not enough to have a team, we need a squad imbued with the same final project and that's what we didn't have in 2006."
Dunga, the 1994 World Cup-winning captain who took over the team three years ago despite a lack of coaching experience, has led Brazil to victory in the 2007 Copa America and this year's Confederations Cup.
His team are also top of the 10-nation South American group for the 2010 World Cup in South Africa.