ImageIO in Apple OS X before 10.10.3 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted .sgi file.
https://support.apple.com/HT204659
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-1282
http://www.securitytracker.com/id/1032048
http://www.securityfocus.com/bid/73982
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html