Heimdal, as used in Apple OS X through 10.9.2, allows remote attackers to cause a denial of service (abort and daemon exit) via ASN.1 data encountered in the Kerberos 5 protocol.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-1394
http://archives.neohapsis.com/archives/bugtraq/2014-04/0134.html