Debian Security Advisory 1722-1 – Derek Chan discovered that the PAM module for the Heimdal Kerberos implementation allows reinitialisation of user credentials when run from a setuid context, resulting in potential local denial of service by overwriting the credential cache file or to local privilege escalation.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/74873/dsa-1722-1.txt
Source: https://packetstormsecurity.com/files/74873/Debian-Linux-Security-Advisory-1722-1.html