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CentOS 7 : realmd (CESA-2015:2184)

medium Nessus Plugin ID 87141

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

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.

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.

Solution

Update the affected realmd packages.

See Also

http://www.nessus.org/u?b348a6d3

Plugin Details

Severity: Medium

ID: 87141

File Name: centos_RHSA-2015-2184.nasl

Version: 2.7

Type: local

Agent: unix

Published: 12/2/2015

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2015-2704

Vulnerability Information

CPE: cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:realmd-devel-docs, p-cpe:/a:centos:centos:realmd

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/30/2015

Vulnerability Publication Date: 5/18/2015

Reference Information

CVE: CVE-2015-2704

RHSA: 2015:2184