An issue was discovered in Pillow before 6.2.0. When reading specially crafted invalid image files, the library can either allocate very large amounts of memory or take an extremely long period of time to process the image.
access.redhat.com/errata/RHSA-2020:0566
access.redhat.com/errata/RHSA-2020:0578
access.redhat.com/errata/RHSA-2020:0580
access.redhat.com/errata/RHSA-2020:0681
access.redhat.com/errata/RHSA-2020:0683
access.redhat.com/errata/RHSA-2020:0694
lists.fedoraproject.org/archives/list/[email protected]/message/EMJBUZQGQ2Q7HXYCQVRLU7OXNC7CAWWU/
lists.fedoraproject.org/archives/list/[email protected]/message/LYDXD7EE4YAEVSTNIFZKNVPRVJX5ZOG3/
pillow.readthedocs.io/en/latest/releasenotes/6.2.0.html
usn.ubuntu.com/4272-1/
www.debian.org/security/2020/dsa-4631