Debian DSA 273-1 Critical: Kerberos Cryptographic Weakness Attack

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 site's 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 (woody) this problem has been
fixed in version 1.0-2.3.

For the unstable distribution (sid) this problem has been
fixed in version 1.2.2-1.

We recommend that you upgrade your krb4 packages immediately.


Upgrade Instructions
- --------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-g...