It was discovered that there was a denial of service vulnerability in the MIT
Kerberos network authentication system,
krb5. The lack of a limit in the
“ASN.1” decoder could lead to infinite recursion and allow an attacker to
overrun the stack and cause the process to crash.
For Debian 8 Jessie, these problems have been fixed in version 1.12.1+dfsg-19+deb8u6.
We recommend that you upgrade your krb5 packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/