OpenAFS before 1.4.15, 1.6.x before 1.6.5, and 1.7.x before 1.7.26 uses weak encryption (DES) for Kerberos keys, which makes it easier for remote attackers to obtain the service key.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-4062
http://www.openafs.org/pages/security/OPENAFS-SA-2013-003.txt
http://www.mandriva.com/security/advisories?name=MDVSA-2014:244