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://usn.ubuntu.com/3668-1/
https://lists.debian.org/debian-lts-announce/2018/03/msg00013.html
https://cgit.freedesktop.org/exempi/commit/?id=65a8492832b7335ffabd01f5f64d89dec757c260