"The World Cup award took place at a time when the FIFA was certainly corrupt in many parts and was simply not possible to get a World Cup in a fair sporting way," Koch said at a Christian Social Union event near Munich, the Bild newspaper reported on Friday.
According to earlier reports by Der Spiegel magazine, Germany bribed four FIFA Executive Committee officials to receive rights to host the World Cup 2006. In November 2015, Germany's police searched the DFB headquarters over a tax evasion case related to the 2006 World Cup.
Germany's World Cup bid committee created a fund for bribing FIFA Executive Committee members, with then-Adidas CEO Robert Louis-Dreyfus depositing over 10 million Swiss francs ($10 million) into the fund, Der Spiegel reported in October. Former DFB President Wolfgang Niersbach resigned from his post on November 9 amid the allegations.