ipsec-tools security update

An updated ipsec-tools package that fixes a bug in parsing of ISAKMP headers
is now available.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

The ipsec-tools package is used in conjunction with the IPsec functionality
in the linux kernel. The ipsec-tools package includes:

- setkey, a program to directly manipulate policies and SAs
- racoon, an IKEv1 keying daemon

A bug was found in the way the racoon daemon handled incoming ISAKMP
requests. It is possible that an attacker could crash the racoon daemon by
sending a specially crafted ISAKMP packet. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2005-0398 to
this issue.

Additionally, the following issues have been fixed:
- racoon mishandled restarts in the presence of stale administration sockets.
- on Red Hat Enterprise Linux 4, racoon and setkey did not properly set up
forward policies, which prevented tunnels from working.

Users of ipsec-tools should upgrade to this updated package, which contains
backported patches, and is not vulnerable to these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

145531 - CAN-2005-0398 racoon DoS
145535 - CAN-2005-0398 racoon DoS
148950 - racoon unable to start with stale socket /tmp/.racoon
150179 - ipsec/racoon/setkey does not properly forward packets to vpn peer

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0398