Scientific Linux: ipa-client Security Update SL5.x Importance and Threat

Date: Thu, 24 Jan 2013 10:36:32 -0600
Reply-To: Pat Riehecky 
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Organization: Fermilab
Subject: Security ERRATA Important: ipa-client on SL5.x i386/x86_64
MIME-Version: 1.0

Synopsis: Important: ipa-client security update
Issue Date: 2013-01-23
CVE Numbers: CVE-2012-5484
--

A weakness was found in the way IPA clients communicated with IPA
servers when
initially attempting to join IPA domains. As there was no secure way to
provide
the IPA server's Certificate Authority (CA) certificate to the client
during a
join, the IPA client enrollment process was susceptible to man-in-the-middle
attacks. This flaw could allow an attacker to obtain access to the IPA
server
using the credentials provided by an IPA client, including administrative
access to the entire domain if the join was performed using an
administrator's
credentials. (CVE-2012-5484)

Note: This weakness was only exposed during the initial client join to the
realm, because the IPA client did not yet have the CA certificate of the
server. Once an IPA client has joined the realm and has obtained the CA
certificate of the IPA server, all further communication is secure. If a
client
were using the OTP (one-time password) method to join to the realm, an
attacker
could only obtain unprivileged access to the server (enough to only join the
realm).

When a fix for this flaw has been applied to the client but not yet the
server,
ipa-client-install, in unattended mode, will fail if you do not have the
correct CA certificate locally, noting that you must use the "--force"
option
to insecurely obtain the certificate. In interactive mode, the
certificate will
try to be obtained securely from LDAP. If this fails, you will be
prompted to
insecurely download the certificate via HTTP. In the same situation when
using
OTP, LDAP will not be queried and you will be prompted to insecurely
download
the certificate via HTTP.
--

SL5
 x86_64
 ipa-client-2.1.3-5.el5_9.2.x86_64.rpm
 ipa-client-debuginfo-2.1.3-5.el5_9.2.x86_64.rpm
 i386
 ipa-client-2.1.3-5.el5_9.2.i386.rpm
 ipa-client-debuginfo-2.1.3-5.el5_9.2.i386.rpm

For dependency resolution the following packages have been added to the SL5
security repo on some older releases:
 x86_64
 authconfig-5.3.21-7.el5.x86_64.rpm
 authconfig-gtk-5.3.21-7.el5.x86_64.rpm
 certmonger-0.50-3.el5.x86_64.rpm
 curl-7.15.5-15.el5.i386.rpm
 curl-7.15.5-15.el5.x86_64.rpm
 curl-devel-7.15.5-15.el5.i386.rpm
 curl-devel-7.15.5-15.el5.x86_64.rpm
 libipa_hbac-1.5.1-58.el5.i386.rpm
 libipa_hbac-1.5.1-58.el5.x86_64.rpm
 libipa_hbac-devel-1.5.1-58.el5.i386.rpm
 libipa_hbac-devel-1.5.1-58.el5.x86_64.rpm
 libipa_hbac-python-1.5.1-58.el5.x86_64.rpm
 libtdb-1.2.10-1.el5.i386.rpm
 libtdb-1.2.10-1.el5.x86_64.rpm
 libtdb-devel-1.2.10-1.el5.i386.rpm
 libtdb-devel-1.2.10-1.el5.x86_64.rpm
 policycoreutils-1.33.12-14.8.el5.x86_64.rpm
 policycoreutils-gui-1.33.12-14.8.el5.x86_64.rpm
 policycoreutils-newrole-1.33.12-14.8.el5.x86_64.rpm
 shadow-utils-4.0.17-21.el5.x86_64.rpm
 sssd-1.5.1-58.el5.x86_64.rpm
 sssd-client-1.5.1-58.el5.i386.rpm
 sssd-client-1.5.1-58.el5.x86_64.rpm
 sssd-tools-1.5.1-58.el5.x86_64.rpm
 xmlrpc-c-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-1.16.24-1206.1840.4.el5.x86_64.rpm
 xmlrpc-c-apps-1.16.24-1206.1840.4.el5.x86_64.rpm
 xmlrpc-c-c++-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-c++-1.16.24-1206.1840.4.el5.x86_64.rpm
 xmlrpc-c-client-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-client++-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-client-1.16.24-1206.1840.4.el5.x86_64.rpm
 xmlrpc-c-client++-1.16.24-1206.1840.4.el5.x86_64.rpm
 xmlrpc-c-devel-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-devel-1.16.24-1206.1840.4.el5.x86_64.rpm
 i386
 authconfig-5.3.21-7.el5.i386.rpm
 authconfig-gtk-5.3.21-7.el5.i386.rpm
 certmonger-0.50-3.el5.i386.rpm
 curl-7.15.5-15.el5.i386.rpm
 curl-devel-7.15.5-15.el5.i386.rpm
 libipa_hbac-1.5.1-58.el5.i386.rpm
 libipa_hbac-devel-1.5.1-58.el5.i386.rpm
 libipa_hbac-python-1.5.1-58.el5.i386.rpm
 libtdb-1.2.10-1.el5.i386.rpm
 libtdb-devel-1.2.10-1.el5.i386.rpm
 policycoreutils-1.33.12-14.8.el5.i386.rpm
 policycoreutils-gui-1.33.12-14.8.el5.i386.rpm
 policycoreutils-newrole-1.33.12-14.8.el5.i386.rpm
 shadow-utils-4.0.17-21.el5.i386.rpm
 sssd-1.5.1-58.el5.i386.rpm
 sssd-client-1.5.1-58.el5.i386.rpm
 sssd-tools-1.5.1-58.el5.i386.rpm
 xmlrpc-c-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-apps-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-c++-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-client-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-client++-1.16.24-1206.1840.4.el5.i386.rpm
 xmlrpc-c-devel-1.16.24-1206.1840.4.el5.i386.rpm

- Scientific Linux Development Team