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

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

Synopsis:          Moderate: pam_krb5 security update
Advisory ID:       RHSA-2008:0907-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0907.html
Issue date:        2008-10-02
CVE Names:         CVE-2008-3825 
=====================================================================

1. Summary:

An updated pam_krb5 package that fixes a security issue is now available
for Red Hat Enterprise Linux 5.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

The pam_krb5 module allows Pluggable Authentication Modules (PAM) aware
applications to use Kerberos to verify user identities by obtaining user
credentials at log in time.

A flaw was found in the pam_krb5 "existing_ticket" configuration option. If
a system is configured to use an existing credential cache via the
"existing_ticket" option, it may be possible for a local user to gain
elevated privileges by using a different, local user's credential cache.
(CVE-2008-3825)

Red Hat would like to thank Stéphane Bertin for responsibly disclosing this
issue.

Users of pam_krb5 should upgrade to this updated package, which contains a
backported patch to resolve this issue.

4. Solution:

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/):

461960 - CVE-2008-3825 pam_krb5 existing_ticket permission flaw

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pam_krb5-2.2.14-1.el5_2.1.src.rpm

i386:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm

x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/pam_krb5-2.2.14-1.el5_2.1.src.rpm

i386:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm

ia64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.ia64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ia64.rpm

ppc:
pam_krb5-2.2.14-1.el5_2.1.ppc.rpm
pam_krb5-2.2.14-1.el5_2.1.ppc64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ppc.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ppc64.rpm

s390x:
pam_krb5-2.2.14-1.el5_2.1.s390.rpm
pam_krb5-2.2.14-1.el5_2.1.s390x.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.s390.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.s390x.rpm

x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.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-2008-3825
http://www.redhat.com/security/updates/classification/#moderate

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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