An issue was discovered in Exempi through 2.4.4. XMPFiles/source/FileHandlers/TIFF_Handler.cpp mishandles a case of a zero length, leading to a heap-based buffer over-read in the MD5Update() function in third-party/zuid/interfaces/MD5.cpp.
https://usn.ubuntu.com/3668-1/
https://lists.debian.org/debian-lts-announce/2018/03/msg00013.html
https://cgit.freedesktop.org/exempi/commit/?id=e163667a06a9b656a047b0ec660b871f29a83c9f