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             AUSCERT External Security Bulletin Redistribution

                ESB-2006.0893 -- [Win][UNIX/Linux][RedHat]
                    Low: mod_auth_kerb security update
                              7 December 2006

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              mod_auth_kerb
Publisher:            Red Hat
Operating System:     Red Hat Enterprise Linux Desktop 4
                      Red Hat Enterprise Linux AS/ES/WS 4
                      UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-5989

Original Bulletin:    https://rhn.redhat.com/errata/RHSA-2006-0746.html

Comment: This advisory references vulnerabilities in products which run on
         platforms other than Red Hat. It is recommended that administrators
         running mod_auth_kerb check for an updated version of the software
         for their operating system.

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                   Red Hat Security Advisory

Synopsis:          Low: mod_auth_kerb security update
Advisory ID:       RHSA-2006:0746-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2006-0746.html
Issue date:        2006-12-06
Updated on:        2006-12-06
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2006-5989 
- - ---------------------------------------------------------------------

1. Summary:

Updated mod_auth_kerb packages that fix a security flaw and a bug in
multiple realm handling are now available for Red Hat Enterprise Linux 4.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

mod_auth_kerb is module for the Apache HTTP Server designed to
provide Kerberos authentication over HTTP.

An off by one flaw was found in the way mod_auth_kerb handles certain
Kerberos authentication messages. A remote client could send a specially
crafted authentication request which could crash an httpd child process
(CVE-2006-5989).

A bug in the handling of multiple realms configured using the
"KrbAuthRealms" directive has also been fixed.

All users of mod_auth_kerb should upgrade to these updated packages, which
contain backported patches that resolve these issues.

4. Solution:

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

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.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

216482 - CVE-2006-5989 mod_auth_kerb segfault with FC6 client

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/mod_auth_kerb-5.0-1.3.src.rpm
24131bdecf30d669d2fb2692dbcfad27  mod_auth_kerb-5.0-1.3.src.rpm

i386:
1d5e62b7225a6e2000af86b789045413  mod_auth_kerb-5.0-1.3.i386.rpm
fed4a53b16b7bfd7a4a0dfaca62f5be6  mod_auth_kerb-debuginfo-5.0-1.3.i386.rpm

ia64:
443b99ef514df01db87733b155f93650  mod_auth_kerb-5.0-1.3.ia64.rpm
e0779dc88b1b5091cb40636b8837b530  mod_auth_kerb-debuginfo-5.0-1.3.ia64.rpm

ppc:
5436a1f27cf066c1726129704acc40cd  mod_auth_kerb-5.0-1.3.ppc.rpm
eef5905de44e82c650de1c10e58587db  mod_auth_kerb-debuginfo-5.0-1.3.ppc.rpm

s390:
2fcd997ce2d9993f1cf3a934be8495c9  mod_auth_kerb-5.0-1.3.s390.rpm
bf7c624895dcbad7e5e571110ed20e2a  mod_auth_kerb-debuginfo-5.0-1.3.s390.rpm

s390x:
e689f54999dd02f97d39ac840f009ede  mod_auth_kerb-5.0-1.3.s390x.rpm
af70fab7de73d73652f33a8a6b74b493  mod_auth_kerb-debuginfo-5.0-1.3.s390x.rpm

x86_64:
f586b2f0183882e66b848020a0226b9c  mod_auth_kerb-5.0-1.3.x86_64.rpm
407aa8cbe7e8feb41b3f8a567d8b5a8d  mod_auth_kerb-debuginfo-5.0-1.3.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/mod_auth_kerb-5.0-1.3.src.rpm
24131bdecf30d669d2fb2692dbcfad27  mod_auth_kerb-5.0-1.3.src.rpm

i386:
1d5e62b7225a6e2000af86b789045413  mod_auth_kerb-5.0-1.3.i386.rpm
fed4a53b16b7bfd7a4a0dfaca62f5be6  mod_auth_kerb-debuginfo-5.0-1.3.i386.rpm

x86_64:
f586b2f0183882e66b848020a0226b9c  mod_auth_kerb-5.0-1.3.x86_64.rpm
407aa8cbe7e8feb41b3f8a567d8b5a8d  mod_auth_kerb-debuginfo-5.0-1.3.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/mod_auth_kerb-5.0-1.3.src.rpm
24131bdecf30d669d2fb2692dbcfad27  mod_auth_kerb-5.0-1.3.src.rpm

i386:
1d5e62b7225a6e2000af86b789045413  mod_auth_kerb-5.0-1.3.i386.rpm
fed4a53b16b7bfd7a4a0dfaca62f5be6  mod_auth_kerb-debuginfo-5.0-1.3.i386.rpm

ia64:
443b99ef514df01db87733b155f93650  mod_auth_kerb-5.0-1.3.ia64.rpm
e0779dc88b1b5091cb40636b8837b530  mod_auth_kerb-debuginfo-5.0-1.3.ia64.rpm

x86_64:
f586b2f0183882e66b848020a0226b9c  mod_auth_kerb-5.0-1.3.x86_64.rpm
407aa8cbe7e8feb41b3f8a567d8b5a8d  mod_auth_kerb-debuginfo-5.0-1.3.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/mod_auth_kerb-5.0-1.3.src.rpm
24131bdecf30d669d2fb2692dbcfad27  mod_auth_kerb-5.0-1.3.src.rpm

i386:
1d5e62b7225a6e2000af86b789045413  mod_auth_kerb-5.0-1.3.i386.rpm
fed4a53b16b7bfd7a4a0dfaca62f5be6  mod_auth_kerb-debuginfo-5.0-1.3.i386.rpm

ia64:
443b99ef514df01db87733b155f93650  mod_auth_kerb-5.0-1.3.ia64.rpm
e0779dc88b1b5091cb40636b8837b530  mod_auth_kerb-debuginfo-5.0-1.3.ia64.rpm

x86_64:
f586b2f0183882e66b848020a0226b9c  mod_auth_kerb-5.0-1.3.x86_64.rpm
407aa8cbe7e8feb41b3f8a567d8b5a8d  mod_auth_kerb-debuginfo-5.0-1.3.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-2006-5989
http://www.redhat.com/security/updates/classification/#low

8. Contact:

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

Copyright 2006 Red Hat, Inc.
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