An issue was discovered in Exempi before 2.4.4. Integer overflow in the Chunk class in XMPFiles/source/FormatSupport/RIFF.cpp allows remote attackers to cause a denial of service (infinite loop) via crafted XMP data in a .avi file.
https://access.redhat.com/errata/RHSA-2019:2048
https://bugs.freedesktop.org/show_bug.cgi?id=102151
https://cgit.freedesktop.org/exempi/commit/?id=65a8492832b7335ffabd01f5f64d89dec757c260
https://lists.debian.org/debian-lts-announce/2018/03/msg00013.html