Exhaust leak sound

This is a new one on me when it comes to cars. So I purchased this car and drove it nearly five hundred miles yesterday drove and ran fine no issues. Today I go to the grocery store and as I am leaving I notice what sounds like an exhaust leak under the hood. Come to find out not an exhaust leak as putting car in park and revving engine all was quiet. Then I noticed turning the wheels to the right stopped this noise. It literally sounds like an exhaust leak coming from under the hood. Also, my ABS light has since come on.