Benoit, who has written for Blick newspaper for years, said Swiss Buemi's future remains uncertain, despite his links to the Force India cockpit for 2013.
Buemi, 24, was Red Bull's reserve driver in 2012 and he is tipped to stay in the role for next year.
"But another door could suddenly open," veteran journalist Benoit wrote. "At Ferrari.
"Buemi knows many secrets of Ferrari's nemesis Red Bull," he added.