realmd allows remote attackers to inject arbitrary configurations in to sssd.conf and smb.conf via a newline character in an LDAP response.

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2015-2184 advisory.

    [0.16.1-5]
    - Revert 0.16.1-4
    - Use samba by default
    - Resolves: rhbz#1271618

    [0.16.1-4]
    - Fix regressions in 0.16.x releases
    - Resolves: rhbz#1258745
    - Resolves: rhbz#1258488

    [0.16.1-3]
    - Fix regression accepting DNS domain names
    - Resolves: rhbz#1243771

    [0.16.1-2]
    - Fix discarded patch: ipa-packages.patch

    [0.16.1-1]
    - Updated to upstream 0.16.1
    - Resolves: rhbz#1241832
    - Resolves: rhbz#1230941

    [0.16.0-1]
    - Updated to upstream 0.16.0
    - Resolves: rhbz#1174911
    - Resolves: rhbz#1142191
    - Resolves: rhbz#1142148

    [0.14.6-5]
    - Don't crash when full_name_format is not in sssd.conf [#1051033]       This is a regression from a prior update.

    [0.14.6-4]
    - Fix full_name_format printf(3) related failure [#1048087]

    [0.14.6-3]
    - Mass rebuild 2013-12-27

    [0.14.6-2]
    - Start oddjob after joining a domain [#967023]

    [0.14.6-1]
    - Update to upstream 0.14.6 point release
    - Set 'kerberos method = system keytab' in smb.conf properly [#997580]
    - Limit Netbios name to 15 chars when joining AD domain [#1001667]

    [0.14.5-1]
    - Update to upstream 0.14.5 point release
    - Fix regression conflicting --unattended and -U as in --user args [#996223]
    - Pass discovered server address to adcli tool [#996995]

    [0.14.4-1]
    - Update to upstream 0.14.4 point release
    - Fix up the [sssd] section in sssd.conf if it's screwed up [#987491]
    - Add an --unattended argument to realm command line client [#976593]
    - Clearer 'realm permit' manual page example [#985800]

    [0.14.3-1]
    - Update to upstream 0.14.3 point release
    - Populate LoginFormats correctly [#967011]
    - Documentation clarifications [#985773] [#967565]
    - Set sssd.conf default_shell per domain [#967569]
    - Notify in terminal output when installing packages [#984960]
    - If joined via adcli, delete computer with adcli too [#967008]
    - If input is not a tty, then read from stdin without getpass()
    - Configure pam_winbind.conf appropriately [#985819]
    - Refer to FreeIPA as IPA [#967019]
    - Support use of kerberos ccache to join when winbind [#985817]

    [0.14.2-3]
    - Run test suite when building the package
    - Fix rpmlint errors

    [0.14.2-2]
    - Install oddjobd and oddjob-mkhomedir when joining domains [#969441]

    [0.14.2-1]
    - Update to upstream 0.14.2 version
    - Discover FreeIPA 3.0 with AD trust correctly [#966148]
    - Only allow joining one realm by default [#966650]
    - Enable the oddjobd service after joining a domain [#964971]
    - Remove sssd.conf allow lists when permitting all [#965760]
    - Add dependency on authconfig [#964675]
    - Remove glib-networking dependency now that we no longer use SSL.

    [0.14.1-1]
    - Update to upstream 0.14.1 version
    - Fix crasher/regression using passwords with joins [#961435]
    - Make second Ctrl-C just quit realm tool [#961325]
    - Fix critical warning when leaving IPA realm [#961320]
    - Don't print out journalctl command in obvious situations [#961230]
    - Document the --all option to 'realm discover' [#961279]
    - No need to require sssd-tools package [#961254]
    - Enable services even in install mode [#960887]
    - Use the AD domain name in sssd.conf directly [#960270]
    - Fix critical warning when service Release() method [#961385]

    [0.14.0-1]
    - Work around broken krb5 with empty passwords [#960001]
    - Add manual page for realmd.conf [#959357]
    - Update to upstream 0.14.0 version

    [0.13.91-1]
    - Fix regression when using one time password [#958667]
    - Support for permitting logins by group [#887675]

    [0.13.90-1]
    - Add option to disable package-kit installs [#953852]
    - Add option to use unqualified names [#953825]
    - Better discovery of domains [#953153]
    - Concept of managing parts of the system [#914892]
    - Fix problems with cache directory [#913457]
    - Clearly explain when realm cannot be joined [#878018]
    - Many other upstream enhancements and fixes

    [0.13.3-2]
    - Add missing glib-networking dependency, currently used       for FreeIPA discovery [#953151]

    [0.13.3-1]
    - Update for upstream 0.13.3 version
    - Add dependency on systemd for installing service file

    [0.13.2-2]
    - Fix problem with sssd not starting after joining

    [0.13.2-1]
    - Update to upstream 0.13.2 version

    [0.13.1-1]
    - Update to upstream 0.13.1 version for bug fixes

    [0.12-2]
    - Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild

    [0.12-1]
    - Update to upstream 0.12 version for bug fixes

    [0.11-1]
    - Update to upstream 0.11 version

    [0.10-1]
    - Update to upstream 0.10 version

    [0.9-1]
    - Update to upstream 0.9 version

    [0.8-2]
    - Add openldap-devel build requirement

    [0.8-1]
    - Update to upstream 0.8 version
    - Add support for translations

    [0.7-2]
    - Build requires gtk-doc

    [0.7-1]
    - Update to upstream 0.7 version
    - Remove files no longer present in upstream version
    - Put documentation in its own realmd-devel-docs subpackage
    - Update upstream URLs

    [0.6-1]
    - Update to upstream 0.6 version

    [0.5-2]
    - Remove missing SssdIpa.service file from the files list.
      This file will return upstream in 0.6

    [0.5-1]
    - Update to upstream 0.5 version

    [0.4-1]
    - Update to upstream 0.4 version
    - Cleanup various rpmlint warnings

    [0.3-2]
    - Add doc files
    - Own directories
    - Remove obsolete parts of spec file
    - Remove explicit dependencies
    - Updated License line to LGPLv2+

    [0.3]
    - Build fixes

    [0.2]
    - Initial RPM

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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.

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.

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.

This update also fixes the following bugs :

  - Joining a Scientific 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.

  - 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.

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.

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.

Fixes for security issues: rhbz#1205752 rhbz#1205753

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated to upstream 0.16.0 Fix issue introduced by a samba subpackage split resulting in realmd failing to join Active Directory domains.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
181077	Oracle Linux 7 : realmd (ELSA-2015-2184)	Nessus	Oracle Linux Local Security Checks	medium
87970	Amazon Linux AMI : realmd (ALAS-2016-636)	Nessus	Amazon Linux Local Security Checks	medium
87571	Scientific Linux Security Update : realmd on SL7.x x86_64 (20151119)	Nessus	Scientific Linux Local Security Checks	medium
87141	CentOS 7 : realmd (CESA-2015:2184)	Nessus	CentOS Local Security Checks	medium
86936	RHEL 7 : realmd (RHSA-2015:2184)	Nessus	Red Hat Local Security Checks	medium
83312	Fedora 21 : realmd-0.15.2-2.fc21 (2015-6387)	Nessus	Fedora Local Security Checks	medium
83015	Fedora 22 : realmd-0.16.0-1.fc22 (2015-6124)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2015-2704

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium