"Durham CCC is delighted to announce that Varun Aaron will join the club as an overseas player for the final few weeks of the season," the county said in a statement.
"The Indian International is set to replace John Hastings, who has been called up to represent Chennai Super Kings in the Champions League Twenty20 competition."
Aaron will be available for the final two LV County Championship games against Northamptonshire and Warwickshire.
Aaron is currently in the middle of a 10-day fast bowling training programme under the guidance of Glenn McGrath, but will fly to England next week to link up with his new teammates in time for the clash with Northamptonshire at Emirates Durham ICG.
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"It's an honour for me to play for Durham," the 24-year-old was quoted as saying in a release issued by Durham.
Durham head Coach Jon Lewis said Aaron will add a lot of zing to the team's bowling attack.
"He's obviously got some good pace and he's young and keen. He didn't start the series (against England) and came into it halfway through and made an impact because he brought genuine pace to their attack, which they didn't really have early on. I'm sure Stuart Broad remembers him!