krb5 - denial of service

Emmanuel Bouillon from NCI Agency discovered multiple vulnerabilities in MIT
Kerberos, a daemon implementing the network authentication protocol.

• CVE-2012-1014
  By sending specially crafted AS-REQ (Authentication Service Request) to a KDC
  (Key Distribution Center), an attacker could make it free an uninitialized
  pointer, corrupting the heap. This can lead to process crash or even arbitrary
  code execution.

This CVE only affects testing (wheezy) and unstable (sid) distributions.

• CVE-2012-1015
  By sending specially crafted AS-REQ to a KDC, an attacker could make it
  dereference an uninitialized pointer, leading to process crash or even
  arbitrary code execution

In both cases, arbitrary code execution is believed to be difficult to achieve,
but might not be impossible.

For the stable distribution (squeeze), this problem has been fixed in
version 1.8.3+dfsg-4squeeze6.

For the testing distribution (wheezy), this problem has been fixed in
version 1.10.1+dfsg-2.

For the unstable distribution (sid), this problem has been fixed in
version 1.10.1+dfsg-2.

We recommend that you upgrade your krb5 packages.