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Category:   Application (Security)  >   Red Hat Enterprise IPA Vendors:   Red Hat
Red Hat Enterprise IPA Installation Procedure Lets Remote Users Retrieve the Master Kerberos Password
SecurityTracker Alert ID:  1020850
SecurityTracker URL:  http://securitytracker.com/id/1020850
CVE Reference:   CVE-2008-3274   (Links to External Site)
Date:  Sep 10 2008
Impact:   Disclosure of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1
Description:   A vulnerability was reported in Red Hat Enterprise IPA. A remote user can obtain passwords.

The installation procedure places the master Kerberos password in the LDAP server in a manner that allows a remote user to retrieve the password via LDAP.

Impact:   A remote user can obtain the master Kerberos password.
Solution:   The vendor has issued a fix.

Red Hat IPA 1 for RHEL 5 Server:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHEIPA/SRPMS/ipa-1.0.0-23.el5ipa.src.rpm

i386:
ipa-admintools-1.0.0-23.el5ipa.i386.rpm
ipa-client-1.0.0-23.el5ipa.i386.rpm
ipa-debuginfo-1.0.0-23.el5ipa.i386.rpm
ipa-python-1.0.0-23.el5ipa.i386.rpm
ipa-server-1.0.0-23.el5ipa.i386.rpm
ipa-server-selinux-1.0.0-23.el5ipa.i386.rpm

x86_64:
ipa-admintools-1.0.0-23.el5ipa.x86_64.rpm
ipa-client-1.0.0-23.el5ipa.x86_64.rpm
ipa-debuginfo-1.0.0-23.el5ipa.x86_64.rpm
ipa-python-1.0.0-23.el5ipa.x86_64.rpm
ipa-server-1.0.0-23.el5ipa.x86_64.rpm
ipa-server-selinux-1.0.0-23.el5ipa.x86_64.rpm

The vendor's advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0860.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2008-0860.html (Links to External Site)
Cause:   Configuration error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   None.


 Source Message Contents

Date:  Wed, 10 Sep 2008 14:23:32 -0400
Subject:  [RHSA-2008:0860-02] Important: ipa security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: ipa security update
Advisory ID:       RHSA-2008:0860-02
Product:           Red Hat Enterprise IPA
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0860.html
Issue date:        2008-09-10
CVE Names:         CVE-2008-3274 
=====================================================================

1. Summary:

Updated ipa packages that fix a security flaw are now available for Red Hat
Enterprise IPA.

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

2. Relevant releases/architectures:

Red Hat IPA 1 for RHEL 5 Server - i386, x86_64

3. Description:

Red Hat Enterprise IPA is an integrated solution to provide
centrally-managed Identity (machines, users, virtual machines, groups,
authentication credentials), Policy (configuration settings, access control
information) and Audit (events, logs, analysis) services.

A flaw was found in the Red Hat Enterprise IPA installation procedure. The
master Kerberos password was set up in the LDAP server in such a way that
it was possible to retrieve the password via an anonymous LDAP connection.
(CVE-2008-3274)

Note: the master Kerberos password is used to encrypt keys. This flaw does
not lead to individual keys being exposed.

Users of Red Hat IPA should upgrade to these updated packages and perform
the operations explained in the solution to resolve this issue.

4. Solution:

To fully resolve this problem, you need to manually perform the following
steps after installing the updated packages:

Disclaimer: The following procedure performs critical, low-level operations
on your IPA system, and it is imperative that you back up your system
before carrying out any of the following steps. A failure during this
procedure may compromise the readability of all or part of your Kerberos
keys.

1. Upgrade all of your servers (masters and replicas) and restart the
dirsrv service on all of them. No other daemon needs to be restarted at
this stage.

2. On one master server, run the following tool:
    $ ipa-fix-2008-3274 --check

This should report that the system is vulnerable.

3. On the same master server, run the following tool:
    $ ipa-fix-2008-3274 --fix

This should dump all Kerberos principals, reload them, and then return a 
message stating that the operation completed successfully. If not, you
should contact Red Hat GSS for immediate assistance.

This step should also create a .gpg file symmetrically-encrypted with the 
Directory Manager password. This file contains a backup of all Kerberos 
key material and is written to /var/lib/ipa/.

Attention: DO NOT RUN THIS COMMAND ON ANY OTHER SERVER. See the next step.

4. On all other IPA servers, run the following tool:
    $ ipa-fix-2008-3274 --fix-replica

This will report that the system is NOT vulnerable and will then download
the master key for the local KDC instance. This command will restart the
KDC service.

If the command reports a system as anything other than not vulnerable,
verify that replication between masters is working correctly. The procedure
will not successfully complete until replication failures are addressed.


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

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bugs fixed (http://bugzilla.redhat.com/):

457835 - CVE-2008-3274 IPA Kerberos master password disclosure

6. Package List:

Red Hat IPA 1 for RHEL 5 Server:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHEIPA/SRPMS/ipa-1.0.0-23.el5ipa.src.rpm

i386:
ipa-admintools-1.0.0-23.el5ipa.i386.rpm
ipa-client-1.0.0-23.el5ipa.i386.rpm
ipa-debuginfo-1.0.0-23.el5ipa.i386.rpm
ipa-python-1.0.0-23.el5ipa.i386.rpm
ipa-server-1.0.0-23.el5ipa.i386.rpm
ipa-server-selinux-1.0.0-23.el5ipa.i386.rpm

x86_64:
ipa-admintools-1.0.0-23.el5ipa.x86_64.rpm
ipa-client-1.0.0-23.el5ipa.x86_64.rpm
ipa-debuginfo-1.0.0-23.el5ipa.x86_64.rpm
ipa-python-1.0.0-23.el5ipa.x86_64.rpm
ipa-server-1.0.0-23.el5ipa.x86_64.rpm
ipa-server-selinux-1.0.0-23.el5ipa.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3274
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2008 Red Hat, Inc.
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