ESB-2018.3406 - [Linux][RedHat] setup: Execute arbitrary code/commands - Existing account 2018-10-31

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

                               ESB-2018.3406
                  Low: setup security and bug fix update
                              31 October 2018

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

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

Product:           setup
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
                   Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1113  

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:3249

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

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

Synopsis:          Low: setup security and bug fix update
Advisory ID:       RHSA-2018:3249-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:3249
Issue date:        2018-10-30
CVE Names:         CVE-2018-1113 
=====================================================================

1. Summary:

An update for setup 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) - noarch
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch
Red Hat Enterprise Linux Server (v. 7) - noarch
Red Hat Enterprise Linux Workstation (v. 7) - noarch
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - noarch

3. Description:

The setup package contains a set of important default system configuration
and setup files. Examples include /etc/passwd, /etc/group, and
/etc/profile. Other examples are the default lists of reserved user IDs,
reserved ports, reserved protocols, allowed shells, allowed secure
terminals.

Security Fix(es):

* setup: nologin listed in /etc/shells violates security expectations
(CVE-2018-1113)

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

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

1566469 - Typing Mistake in /etc/protocols
1571094 - CVE-2018-1113 setup: nologin listed in /etc/shells violates security expectations

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
setup-2.8.71-10.el7.src.rpm

noarch:
setup-2.8.71-10.el7.noarch.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
setup-2.8.71-10.el7.src.rpm

noarch:
setup-2.8.71-10.el7.noarch.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
setup-2.8.71-10.el7.src.rpm

noarch:
setup-2.8.71-10.el7.noarch.rpm

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

Source:
setup-2.8.71-10.el7.src.rpm

noarch:
setup-2.8.71-10.el7.noarch.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
setup-2.8.71-10.el7.src.rpm

noarch:
setup-2.8.71-10.el7.noarch.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-2018-1113
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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