RHN Errata Alert: Critical: sendmail security update

[Red Hat Network Alert <dev-null@rhn.redhat.com>]

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=3970

Security Advisory - RHSA-2006:0265-9
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Summary:
Critical: sendmail security update

Updated sendmail packages to fix a security issue are now available for Red
Hat Enterprise Linux 2.1.

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

Description:
Sendmail is a Mail Transport Agent (MTA) used to send mail between machines.

A flaw in the handling of asynchronous signals was discovered in Sendmail.
A remote attacker may be able to exploit a race condition to execute
arbitrary code as root.  The Common Vulnerabilities and Exposures project
assigned the name CVE-2006-0058 to this issue.

By default on Red Hat Enterprise Linux 2.1, Sendmail is configured to only
accept connections from the local host.  Therefore only users who have
configured Sendmail to listen to remote hosts would be able to be remotely
exploited by this vulnerability.

In order to correct this issue for Red Hat Enterprise Linux 2.1 users, it
was necessary to upgrade the version of Sendmail from 8.11 as originally
shipped to Sendmail 8.12 with the addition of the security patch supplied
by Sendmail Inc.  This erratum provides updated packages based on Sendmail
8.12 with a compatibility mode enabled.  After updating to these packages,
users should pay close attention to their sendmail logs to ensure that the
upgrade completed sucessfully.

References:
http://www.kb.cert.org/vuls/id/834865
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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
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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 is 1 affected system registered in 'Your RHN' (only systems for
which you have explicitly enabled Errata Alerts are shown).

Release   Arch       Profile Name
--------  --------   ------------


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