A cryptographic weakness in version 4 of the Kerberos protocol allows
an attacker to use a chosen-plaintext attack to impersonate any
principal in a realm. Additional cryptographic weaknesses in the krb4
implementation permit the use of cut-and-paste attacks to fabricate
krb4 tickets for unauthorized client principals if triple-DES keys are
used to key krb4 services. These attacks can subvert a sites entire
Kerberos authentication infrastructure.
For the stable distribution (woody) this problem has been
fixed in version 1.1-8-2.3.
For the old stable distribution (potato) this problem has been
fixed in version 1.0-2.3.
