openssh security update

Updated openssh packages are now available for Red Hat Linux Advanced
Server. These updates fix an input validation error in OpenSSH.

OpenSSH provides an implementation of the SSH (secure shell) protocol used
for logging into and executing commands on remote machines.

Versions of the OpenSSH server between 2.3.1 and 3.3 contain an input
validation error that can result in an integer overflow and privilege
escalation.

At this time, Red Hat does not believe that the default installation of
OpenSSH on Red Hat Linux is vulnerable to this issue; however a user would
be vulnerable if the configuration option "PAMAuthenticationViaKbdInt" is
enabled in the sshd configuration file (it is not enabled by default).

We have applied the security fix provided by the OpenSSH team to these
errata packages which are based on OpenSSH 3.1p1. This should minimize the
impact of upgrading to our errata packages.

All users of OpenSSH should update to these errata packages which are not
vulnerable to this issue.

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

Please note that this update is available via Red Hat Network. To use Red
Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

https://www.redhat.com/security/data/cve/CVE-2002-0640.html
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=102510268109227
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=102511867031136

ChallengeResponseAuthentication, openssh, pam, security