Johnson's office has dismissed the damning accusations, insisting all "reportable donations" are transparently disclosed and that the prime minister "has never interfered in a government leak inquiry".
"I indeed share the widespread concern about some of the stuff that we're reading at the moment ... and I know that the Cabinet Secretary shares my concern as well," Johnson told parliament, saying top civil servants should have experience of the private sector but it was not clear that "those boundaries have been properly understood".
"The Cabinet Office is commissioning an independent review on behalf of the prime minister to establish the development and use of supply chain finance and associated activities in government and the role Greensill played in those," he told reporters.
This independent review will also look at how contracts were secured and business representatives engaged with government. It will be led by legal expert Nigel Boardman.
"I'm afraid you can see what's happening in France... It's very sad actually - it's very very sad," Johnson said. "When they get it in France and they get it bad, two or three weeks later it comes to us.
"I don't want to say that the government is going to agree with absolutely everything in it, but it has some original and stimulating work in it but I think people need to read and to consider," Johnson said.
"There are very serious issues that our society faces to do with racism that we need to address, we've got, we've got to do more to fix it and we need to understand the severity of the problem," he said.