CVE-2021-28677

An issue was discovered in Pillow before 8.2.0. For EPS data, the readline
implementation used in EPSImageFile has to deal with any combination of \r
and \n as line endings. It used an accidentally quadratic method of
accumulating lines while looking for a line ending. A malicious EPS file
could use this to perform a DoS of Pillow in the open phase, before an
image was accepted for opening.