Sebastian Krahmer discovered a Denial of Service vulnerability in the
racoon daemon. By sending specially crafted ISAKMP packets, a remote
attacker could trigger a buffer overflow which caused racoon to crash.
This update does not introduce any source code changes affecting the
ipsec-tools package. It is necessary to update the version number of
the package in order to support an update to the "racoon" package.
Please note that racoon is not officially supported by Ubuntu (it is
in the "universe" component of the archive).