fits-io.c in GIMP before 2.8.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a malformed XTENSION header of a .fit file, as demonstrated using a long string.
https://exchange.xforce.ibmcloud.com/vulnerabilities/76658
https://bugzilla.gnome.org/show_bug.cgi?id=676804
http://www.ubuntu.com/usn/USN-1559-1
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00000.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-3214
http://www.securityfocus.com/bid/54246
http://www.reactionpenetrationtesting.co.uk/FIT-file-handling-dos.html
http://www.mandriva.com/security/advisories?name=MDVSA-2013:082
http://www.exploit-db.com/exploits/19482
http://archives.neohapsis.com/archives/bugtraq/2012-06/0192.html