ESB-2018.3400 - [UNIX/Linux][RedHat] krb5: Multiple vulnerabilities 2018-10-31

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3400
            Low: krb5 security, bug fix, and enhancement update
                              31 October 2018

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

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

Product:           krb5
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service   -- Existing Account
                   Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5730 CVE-2018-5729 

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:3071

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Red Hat. It is recommended that administrators
         running krb5 check for an updated version of the software for their
         operating system.

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

Synopsis:          Low: krb5 security, bug fix, and enhancement update
Advisory ID:       RHSA-2018:3071-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:3071
Issue date:        2018-10-30
CVE Names:         CVE-2018-5729 CVE-2018-5730 
=====================================================================

1. Summary:

An update for krb5 is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Low. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

3. Description:

Kerberos is a network authentication system, which can improve the security
of your network by eliminating the insecure practice of sending passwords
over the network in unencrypted form. It allows clients and servers to
authenticate to each other with the help of a trusted third party, the
Kerberos key distribution center (KDC).

Security Fix(es):

* krb5: null dereference in kadmind or DN container check bypass by
supplying special crafted data (CVE-2018-5729)

* krb5: DN container check bypass by supplying special crafted data
(CVE-2018-5730)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.6 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, running Kerberos services (krb5kdc,
kadmin, and kprop) will be restarted automatically.

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

1373909 - Running systemctl stop kadmin.service causes the status to be failed instead of inactive
1497301 - [RFE] Add German translation (de_DE.UTF-8)
1525232 - Fix network service dependencies
1538491 - certid option of PKINIT plugin does not handle leading zeros
1539824 - Order of processing for files in included directories is undefined
1540130 - [RFE] make preauth types more descriptive in krb5 trace
1551082 - CVE-2018-5730 krb5: DN container check bypass by supplying special crafted data
1551083 - CVE-2018-5729 krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data
1563166 - kdestroy -A does not work with multiple principals when using KCM
1570600 - krb5-libs uses slow crypto implementation
1599721 - ipa-server-install fails when FIPS mode is enabled

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
krb5-1.15.1-34.el7.src.rpm

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-libs-1.15.1-34.el7.i686.rpm
krb5-libs-1.15.1-34.el7.x86_64.rpm
krb5-pkinit-1.15.1-34.el7.x86_64.rpm
krb5-workstation-1.15.1-34.el7.x86_64.rpm
libkadm5-1.15.1-34.el7.i686.rpm
libkadm5-1.15.1-34.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-devel-1.15.1-34.el7.i686.rpm
krb5-devel-1.15.1-34.el7.x86_64.rpm
krb5-server-1.15.1-34.el7.x86_64.rpm
krb5-server-ldap-1.15.1-34.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
krb5-1.15.1-34.el7.src.rpm

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-libs-1.15.1-34.el7.i686.rpm
krb5-libs-1.15.1-34.el7.x86_64.rpm
krb5-pkinit-1.15.1-34.el7.x86_64.rpm
krb5-workstation-1.15.1-34.el7.x86_64.rpm
libkadm5-1.15.1-34.el7.i686.rpm
libkadm5-1.15.1-34.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-devel-1.15.1-34.el7.i686.rpm
krb5-devel-1.15.1-34.el7.x86_64.rpm
krb5-server-1.15.1-34.el7.x86_64.rpm
krb5-server-ldap-1.15.1-34.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
krb5-1.15.1-34.el7.src.rpm

ppc64:
krb5-debuginfo-1.15.1-34.el7.ppc.rpm
krb5-debuginfo-1.15.1-34.el7.ppc64.rpm
krb5-devel-1.15.1-34.el7.ppc.rpm
krb5-devel-1.15.1-34.el7.ppc64.rpm
krb5-libs-1.15.1-34.el7.ppc.rpm
krb5-libs-1.15.1-34.el7.ppc64.rpm
krb5-pkinit-1.15.1-34.el7.ppc64.rpm
krb5-server-1.15.1-34.el7.ppc64.rpm
krb5-server-ldap-1.15.1-34.el7.ppc64.rpm
krb5-workstation-1.15.1-34.el7.ppc64.rpm
libkadm5-1.15.1-34.el7.ppc.rpm
libkadm5-1.15.1-34.el7.ppc64.rpm

ppc64le:
krb5-debuginfo-1.15.1-34.el7.ppc64le.rpm
krb5-devel-1.15.1-34.el7.ppc64le.rpm
krb5-libs-1.15.1-34.el7.ppc64le.rpm
krb5-pkinit-1.15.1-34.el7.ppc64le.rpm
krb5-server-1.15.1-34.el7.ppc64le.rpm
krb5-server-ldap-1.15.1-34.el7.ppc64le.rpm
krb5-workstation-1.15.1-34.el7.ppc64le.rpm
libkadm5-1.15.1-34.el7.ppc64le.rpm

s390x:
krb5-debuginfo-1.15.1-34.el7.s390.rpm
krb5-debuginfo-1.15.1-34.el7.s390x.rpm
krb5-devel-1.15.1-34.el7.s390.rpm
krb5-devel-1.15.1-34.el7.s390x.rpm
krb5-libs-1.15.1-34.el7.s390.rpm
krb5-libs-1.15.1-34.el7.s390x.rpm
krb5-pkinit-1.15.1-34.el7.s390x.rpm
krb5-server-1.15.1-34.el7.s390x.rpm
krb5-server-ldap-1.15.1-34.el7.s390x.rpm
krb5-workstation-1.15.1-34.el7.s390x.rpm
libkadm5-1.15.1-34.el7.s390.rpm
libkadm5-1.15.1-34.el7.s390x.rpm

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-devel-1.15.1-34.el7.i686.rpm
krb5-devel-1.15.1-34.el7.x86_64.rpm
krb5-libs-1.15.1-34.el7.i686.rpm
krb5-libs-1.15.1-34.el7.x86_64.rpm
krb5-pkinit-1.15.1-34.el7.x86_64.rpm
krb5-server-1.15.1-34.el7.x86_64.rpm
krb5-server-ldap-1.15.1-34.el7.x86_64.rpm
krb5-workstation-1.15.1-34.el7.x86_64.rpm
libkadm5-1.15.1-34.el7.i686.rpm
libkadm5-1.15.1-34.el7.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
krb5-1.15.1-34.el7.src.rpm

aarch64:
krb5-debuginfo-1.15.1-34.el7.aarch64.rpm
krb5-devel-1.15.1-34.el7.aarch64.rpm
krb5-libs-1.15.1-34.el7.aarch64.rpm
krb5-pkinit-1.15.1-34.el7.aarch64.rpm
krb5-server-1.15.1-34.el7.aarch64.rpm
krb5-server-ldap-1.15.1-34.el7.aarch64.rpm
krb5-workstation-1.15.1-34.el7.aarch64.rpm
libkadm5-1.15.1-34.el7.aarch64.rpm

ppc64le:
krb5-debuginfo-1.15.1-34.el7.ppc64le.rpm
krb5-devel-1.15.1-34.el7.ppc64le.rpm
krb5-libs-1.15.1-34.el7.ppc64le.rpm
krb5-pkinit-1.15.1-34.el7.ppc64le.rpm
krb5-server-1.15.1-34.el7.ppc64le.rpm
krb5-server-ldap-1.15.1-34.el7.ppc64le.rpm
krb5-workstation-1.15.1-34.el7.ppc64le.rpm
libkadm5-1.15.1-34.el7.ppc64le.rpm

s390x:
krb5-debuginfo-1.15.1-34.el7.s390.rpm
krb5-debuginfo-1.15.1-34.el7.s390x.rpm
krb5-devel-1.15.1-34.el7.s390.rpm
krb5-devel-1.15.1-34.el7.s390x.rpm
krb5-libs-1.15.1-34.el7.s390.rpm
krb5-libs-1.15.1-34.el7.s390x.rpm
krb5-pkinit-1.15.1-34.el7.s390x.rpm
krb5-server-1.15.1-34.el7.s390x.rpm
krb5-server-ldap-1.15.1-34.el7.s390x.rpm
krb5-workstation-1.15.1-34.el7.s390x.rpm
libkadm5-1.15.1-34.el7.s390.rpm
libkadm5-1.15.1-34.el7.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
krb5-1.15.1-34.el7.src.rpm

x86_64:
krb5-debuginfo-1.15.1-34.el7.i686.rpm
krb5-debuginfo-1.15.1-34.el7.x86_64.rpm
krb5-devel-1.15.1-34.el7.i686.rpm
krb5-devel-1.15.1-34.el7.x86_64.rpm
krb5-libs-1.15.1-34.el7.i686.rpm
krb5-libs-1.15.1-34.el7.x86_64.rpm
krb5-pkinit-1.15.1-34.el7.x86_64.rpm
krb5-server-1.15.1-34.el7.x86_64.rpm
krb5-server-ldap-1.15.1-34.el7.x86_64.rpm
krb5-workstation-1.15.1-34.el7.x86_64.rpm
libkadm5-1.15.1-34.el7.i686.rpm
libkadm5-1.15.1-34.el7.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://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-5729
https://access.redhat.com/security/cve/CVE-2018-5730
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index

8. Contact:

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

Copyright 2018 Red Hat, Inc.
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