There is a SEGV in Exiv2::Internal::TiffParserWorker::findPrimaryGroups of tiffimage_int.cpp in Exiv2 0.27-RC3. A crafted input will lead to a remote denial of service attack.
access.redhat.com/errata/RHSA-2019:2101
github.com/Exiv2/exiv2/issues/590
github.com/TeamSeri0us/pocs/tree/master/exiv2/20181206
lists.debian.org/debian-lts-announce/2019/02/msg00038.html
lists.debian.org/debian-lts-announce/2023/01/msg00004.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXCEKTYF7HLM6VH2WCWO2HXTJH37MBLA/