heimdal - cross-realm

According to a
security advisory from the heimdal project,
heimdal, a suite of software implementing the Kerberos protocol, has
“a cross-realm vulnerability allowing someone with control over a
realm to impersonate anyone in the cross-realm trust path.”

For the current stable distribution (woody) this problem has been
fixed in version 0.4e-7.woody.8.1.

For the unstable distribution (sid), this problem has been fixed in
version 0.6.1-1.

We recommend that you update your heimdal package.