Integer overflow in the quicktime_read_pascal function in libquicktime 1.2.4 and earlier allows remote attackers to cause a denial of service or possibly have other unspecified impact via a crafted hdlr MP4 atom.
https://www.exploit-db.com/exploits/39487/
https://packetstormsecurity.com/files/135899/libquicktime-1.2.4-Integer-Overflow.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-3483
http://www.securityfocus.com/bid/95880