Double free vulnerabilities in the error handling code for ASN.1 decoders in the (1) Key Distribution Center (KDC) library and (2) client library for MIT Kerberos 5 (krb5) 1.3.4 and earlier may allow remote attackers to execute arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17157
http://www.kb.cert.org/vuls/id/795632
http://www.gentoo.org/security/en/glsa/glsa-200409-09.xml
http://www.debian.org/security/2004/dsa-543
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt