Cisco Security Advisory – Two vulnerabilities in the Massachusetts Institute of Technology (MIT) Kerberos 5 implementation that affect Cisco VPN 3000 Series Concentrators have been announced by the MIT Kerberos Team. Cisco VPN 3000 Series Concentrators authenticating users against a Kerberos Key Distribution Center (KDC) may be vulnerable to remote code execution and to Denial of Service (DoS) attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/34231/cisco-sa-20040831-krb5.txt
Source: https://packetstormsecurity.com/files/34231/Cisco-Security-Advisory-20040831-krb5.html