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Redhat : Updated kernel packages fix security vulnerabilities



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=2200

Security Advisory - RHSA-2004:255-10
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Summary:
Updated kernel packages fix security vulnerabilities

Updated kernel packages for Red Hat Enterprise Linux 3 that fix security
vulnerabilities are now available.

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

A flaw was found in Linux kernel versions 2.4 and 2.6 for x86 and x86_64
that allowed local users to cause a denial of service (system crash) by
triggering a signal handler with a certain sequence of fsave and frstor
instructions.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0554 to this issue.

Another flaw was discovered in an error path supporting the clone()
system call that allowed local users to cause a denial of service
(memory leak) by passing invalid arguments to clone() running in an
infinite loop of a user's program.  The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0427
to this issue.

Enhancements were committed to the 2.6 kernel by Al Viro which enabled the
Sparse source code checking tool to check for a certain class of kernel
bugs. A subset of these fixes also applies to various drivers in the 2.4
kernel.  Although the majority of these resides in drivers unsupported in
Red Hat Enterprise Linux 3, the flaws could lead to privilege escalation or
access to kernel memory.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0495 to these issues.

All Red Hat Enterprise Linux 3 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
backported patches to correct these issues.
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Taking Action
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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.


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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.


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Affected Systems List
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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 are 54 affected systems registered in 'Your RHN' (only systems for
which you have explicitly enabled Errata Alerts are shown).


The Red Hat Network Team

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