A reachable Object::dictLookup assertion in Poppler 0.72.0 allows attackers to cause a denial of service due to the lack of a check for the dict data type, as demonstrated by use of the FileSpec class (in FileSpec.cc) in pdfdetach.
https://usn.ubuntu.com/3865-1/
https://lists.debian.org/debian-lts-announce/2022/09/msg00030.html
https://lists.debian.org/debian-lts-announce/2020/11/msg00014.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00033.html
https://gitlab.freedesktop.org/poppler/poppler/issues/704
https://gitlab.freedesktop.org/poppler/poppler/commit/de0c0b8324e776f0b851485e0fc9622fc35695b7
https://access.redhat.com/errata/RHSA-2019:2713