Redhat : RHN Errata Alert: Updated kernel packages fix security vulnerability

[Duncan Phillips <dphillip@halfdome.nac.uci.edu>]

Red Hat Network has determined that the following advisory is applicable to
one or more of the systems you have registered:

Complete information about this errata can be found at the following location:
     https://rhn.redhat.com/network/errata/errata_details.pxt?eid=2210

Security Advisory - RHSA-2004:354-08
------------------------------------------------------------------------------
Summary:
Updated kernel packages fix security vulnerability

Updated kernel packages that fix a security vulnerability affecting the
kernel nfs server for Red Hat Enterprise Linux 2.1 are now available.

Description:
The Linux kernel handles the basic functions of the operating system.

During an audit of the Linux kernel, SUSE discovered a flaw that allowed
a user to make unauthorized changes to the group ID of files in certain
circumstances.  In the 2.4 kernel, as shipped with Red Hat Enterprise
Linux, the only way this could happen is through the kernel nfs server.  A
user on a system that mounted a remote file system from a vulnerable
machine may be able to make unauthorized changes to the group ID of
exported files. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0497 to this issue.

Only Red Hat Enterprise Linux systems that are configured to share file
systems via NFS are affected by this issue.

All Red Hat Enterprise Linux 2.1 users are advised to upgrade their kernels
to the packages associated with their machine architectures and
configurations as listed in this erratum.  These packages contain a
backported patch to correct this issue.

References:
http://www.redhat.com/docs/manuals/linux/RHL-7.2-Manual/ref-guide/s1-nfs-server-config.html
------------------------------------------------------------------------------

-------------
Taking Action
-------------
You may address the issues outlined in this advisory in two ways:

     - select your server name by clicking on its name from the list
       available at the following location, and then schedule an
       errata update for it:
           https://rhn.redhat.com/network/systemlist/system_list.pxt

     - run the Update Agent on each affected server.


---------------------------------
Changing Notification Preferences
---------------------------------
To enable/disable your Errata Alert preferences globally please log in to RHN
and navigate from "Your RHN" / "Your Account" to the "Preferences" tab.

        URL: https://rhn.redhat.com/network/my_account/my_prefs.pxt

You can also enable/disable notification on a per system basis by selecting an
individual system from the "Systems List". From the individual system view
click the "Details" tab.


---------------------
Affected Systems List
---------------------
This Errata Advisory may apply to the systems listed below. If you know that
this errata does not apply to a system listed, it might be possible that the
package profile for that server is out of date. In that case you should run
'up2date -p' as root on the system in question to refresh your software profile.

There is 1 affected system registered in 'Your RHN' (only systems for
which you have explicitly enabled Errata Alerts are shown).

Release   Arch       Profile Name
--------  --------   ------------
2.1AS     i686       rhn.nacs.uci.edu                        


The Red Hat Network Team

This message is being sent by Red Hat Network Alert to:
    RHN user login:        ucinacs
    Email address on file: <root@rhn.nacs.uci.edu>

If you lost your RHN password, you can use the information above to
retrieve it by email from the following address:
    https://rhn.redhat.com/forgot_password.pxt

To cancel these notices, go to:
    https://rhn.redhat.com/oo.pxt?uid=3145121&oid=3699264