An issue was discovered in PHP before 5.6.37, 7.0.x before 7.0.31, 7.1.x before 7.1.20, and 7.2.x before 7.2.8. An Integer Overflow leads to a heap-based buffer over-read in exif_thumbnail_extract of exif.c.
php.net/ChangeLog-5.php
php.net/ChangeLog-7.php
www.securityfocus.com/bid/104871
bugs.php.net/bug.php?id=76423
lists.debian.org/debian-lts-announce/2018/09/msg00000.html
security.netapp.com/advisory/ntap-20181107-0003/
usn.ubuntu.com/3766-1/
usn.ubuntu.com/3766-2/
www.debian.org/security/2018/dsa-4353
www.tenable.com/security/tns-2018-12