[RHSA-2015:2184-07] Moderate: realmd security, bug fix, and enhancement update

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Red Hat Security Advisory

 

Synopsis: Moderate: realmd security, bug fix, and enhancement update

Advisory ID: RHSA-2015:2184-07

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2184.html

Issue date: 2015-11-19

CVE Names: CVE-2015-2704

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1. Summary:

 

Updated realmd packages that fix two security issues, several bugs, and add

various enhancements are now available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having Moderate security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links 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) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

 

3. Description:

 

The realmd DBus system service manages discovery of and enrollment in

realms and domains, such as Active Directory or Identity Management (IdM).

The realmd service detects available domains, automatically configures the

system, and joins it as an account to a domain.

 

A flaw was found in the way realmd parsed certain input when writing

configuration into the sssd.conf or smb.conf file. A remote attacker could

use this flaw to inject arbitrary configurations into these files via a

newline character in an LDAP response. (CVE-2015-2704)

 

It was found that the realm client would try to automatically join an

active directory domain without authentication, which could potentially

lead to privilege escalation within a specified domain. (BZ#1205751)

 

The realmd packages have been upgraded to upstream version 0.16.1, which

provides a number of bug fixes and enhancements over the previous version.

(BZ#1174911)

 

This update also fixes the following bugs:

 

* Joining a Red Hat Enterprise Linux machine to a domain using the realm

utility creates /home/domainname/[username]/ directories for domain users.

Previously, SELinux labeled the domain users' directories incorrectly. As a

consequence, the domain users sometimes experienced problems with SELinux

policy. This update modifies the realmd service default behavior so that

the domain users' directories are compatible with the standard SELinux

policy. (BZ#1241832)

 

* Previously, the realm utility was unable to join or discover domains with

domain names containing underscore (_). The realmd service has been

modified to process underscores in domain names correctly, which fixes the

described bug. (BZ#1243771)

 

In addition, this update adds the following enhancement:

 

* The realmd utility now allows the user to disable automatic ID mapping

from the command line. To disable the mapping, pass the

"--automatic-id-mapping=no" option to the realmd utility. (BZ#1230941)

 

All realmd users are advised to upgrade to these updated packages, which

correct these issues and add these enhancements.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

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

 

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

 

1142191 - realm command crashes when no input password

1174911 - Rebase to 0.16.x

1205751 - realmd: unauthenticated Active Directory join

1205752 - CVE-2015-2704 realmd: untrusted data is used when configuring sssd.conf and/or smb.conf

1241832 - Wrong SELinux label on domain users home folders

1243771 - realm fails to join domain names with underscore in name

1271618 - net ads keytab add fails on system joined to AD with RHEL 7.2 realm join

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

realmd-0.16.1-5.el7.src.rpm

 

x86_64:

realmd-0.16.1-5.el7.x86_64.rpm

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

 

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

 

x86_64:

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

realmd-devel-docs-0.16.1-5.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

realmd-0.16.1-5.el7.src.rpm

 

x86_64:

realmd-0.16.1-5.el7.x86_64.rpm

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

 

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

 

x86_64:

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

realmd-devel-docs-0.16.1-5.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

realmd-0.16.1-5.el7.src.rpm

 

aarch64:

realmd-0.16.1-5.el7.aarch64.rpm

realmd-debuginfo-0.16.1-5.el7.aarch64.rpm

 

ppc64:

realmd-0.16.1-5.el7.ppc64.rpm

realmd-debuginfo-0.16.1-5.el7.ppc64.rpm

 

ppc64le:

realmd-0.16.1-5.el7.ppc64le.rpm

realmd-debuginfo-0.16.1-5.el7.ppc64le.rpm

 

s390x:

realmd-0.16.1-5.el7.s390x.rpm

realmd-debuginfo-0.16.1-5.el7.s390x.rpm

 

x86_64:

realmd-0.16.1-5.el7.x86_64.rpm

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

 

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

 

aarch64:

realmd-debuginfo-0.16.1-5.el7.aarch64.rpm

realmd-devel-docs-0.16.1-5.el7.aarch64.rpm

 

ppc64:

realmd-debuginfo-0.16.1-5.el7.ppc64.rpm

realmd-devel-docs-0.16.1-5.el7.ppc64.rpm

 

ppc64le:

realmd-debuginfo-0.16.1-5.el7.ppc64le.rpm

realmd-devel-docs-0.16.1-5.el7.ppc64le.rpm

 

s390x:

realmd-debuginfo-0.16.1-5.el7.s390x.rpm

realmd-devel-docs-0.16.1-5.el7.s390x.rpm

 

x86_64:

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

realmd-devel-docs-0.16.1-5.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

realmd-0.16.1-5.el7.src.rpm

 

x86_64:

realmd-0.16.1-5.el7.x86_64.rpm

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

 

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

 

x86_64:

realmd-debuginfo-0.16.1-5.el7.x86_64.rpm

realmd-devel-docs-0.16.1-5.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-2015-2704

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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