Red Hat Security Advisory: ipa-client security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2013:0189 Final 1 1 2013-01-23T21:35:00Z Current version 2013-01-23T21:35:00Z 2013-01-23T21:35:00Z Red Hat rhsa-to-cvrf 1.0.1484 2013-01-23T21:54:01Z An updated ipa-client package that fixes one security issue is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. Red Hat Identity Management is a centralized authentication, identity management and authorization solution for both traditional and cloud-based enterprise environments. 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). Red Hat would like to thank Petr Menšík for reporting this issue. 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. Users of ipa-client are advised to upgrade to this updated package, which corrects this issue. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2013 Red Hat, Inc. All rights reserved. Important https://rhn.redhat.com/errata/RHSA-2013-0189.html https://rhn.redhat.com/errata/RHSA-2013-0189.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/updates/classification/#important Red Hat Enterprise Linux Desktop (v. 5 client) Red Hat Enterprise Linux (v. 5 server) ipa-client-2.1.3-5.el5_9.2.src.rpm ipa-client-2.1.3-5.el5_9.2 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) ipa-client-2.1.3-5.el5_9.2 as a component of Red Hat Enterprise Linux (v. 5 server) 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. 2012-11-09T00:00:00Z 2013-01-23T00:00:00Z CVE-2012-5484 5Client-5.9.Z:ipa-client-2.1.3-5.el5_9.2 5Server-5.9.Z:ipa-client-2.1.3-5.el5_9.2 Important 6.8 AV:A/AC:H/Au:N/C:C/I:C/A:C Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 https://rhn.redhat.com/errata/RHSA-2013-0189.html http://www.freeipa.org/page/CVE-2012-5484 http://www.freeipa.org/page/CVE-2012-5484 https://www.redhat.com/security/data/cve/CVE-2012-5484.html CVE-2012-5484 https://bugzilla.redhat.com/show_bug.cgi?id=876307 bz#876307: CVE-2012-5484 ipa: weakness when initiating join from IPA client can potentially compromise IPA domain Red Hat would like to thank Petr Menšík for reporting this issue.