krb5 - denial of service

It was discovered that krb5, a system for authenticating users and services on a
network, is prone to integer underflow in the AES and RC4 decryption operations of
the crypto library. A remote attacker can cause crashes, heap corruption, or,
under extraordinarily unlikely conditions, arbitrary code execution.

For the old stable distribution (etch), this problem has been fixed in
version 1.4.4-7etch8.

For the stable distribution (lenny), this problem has been fixed in
version 1.6.dfsg.4~beta1-5lenny2.

For the testing distribution (squeeze), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 1.8+dfsg~alpha1-1.

We recommend that you upgrade your krb5 package.