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Red Hat Security Advisory 2017-1476-01

Red Hat Security Advisory 2017-1476-01
Posted Jun 16, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1476-01 - Ansible is a simple model-driven configuration management, multi-node deployment, and remote-task execution system. Ansible works over SSH and does not require any software or daemons to be installed on remote nodes. Extension modules can be written in any language and are transferred to managed machines automatically. Security Fix: An input validation vulnerability was found in Ansible's handling of data sent from client systems. An attacker with control over a client system being managed by Ansible, and the ability to send facts back to the Ansible server, could use this flaw to execute arbitrary code on the Ansible server using the Ansible server privileges.

tags | advisory, remote, arbitrary
systems | linux, redhat
advisories | CVE-2017-7466, CVE-2017-7473, CVE-2017-7481
MD5 | f3ed6197b27f5f25320c55d8f4182a33

Red Hat Security Advisory 2017-1476-01

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

Synopsis: Important: ansible security update
Advisory ID: RHSA-2017:1476-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1476
Issue date: 2017-06-15
CVE Names: CVE-2017-7466 CVE-2017-7473 CVE-2017-7481
=====================================================================

1. Summary:

An update for ansible is now available for Red Hat OpenStack Platform 11.0
(Ocata).

Red Hat Product Security has rated this update as having a security impact
of Important. 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 OpenStack Platform 11.0 - noarch

3. Description:

Ansible is a simple model-driven configuration management, multi-node
deployment, and remote-task execution system. Ansible works over SSH and
does not require any software or daemons to be installed on remote nodes.
Extension modules can be written in any language and are transferred to
managed machines automatically.

Security Fix(es):

* An input validation vulnerability was found in Ansible's handling of data
sent from client systems. An attacker with control over a client system
being managed by Ansible, and the ability to send facts back to the Ansible
server, could use this flaw to execute arbitrary code on the Ansible server
using the Ansible server privileges. (CVE-2017-7466)

* Ansible versions 2.2.3 and earlier are vulnerable to an information
disclosure flaw due to the interaction of call back plugins and the no_log
directive (information may not be sanitized properly). (CVE-2017-7473)

* An input validation flaw was found in Ansible, where it fails to properly
mark lookup-plugin results as unsafe. If an attacker could control the
results of lookup() calls, they could inject Unicode strings to be parsed
by the jinja2 templating system, resulting in code execution. By default,
the jinja2 templating language is now marked as 'unsafe' and is not
evaluated. (CVE-2017-7481)

The CVE-2017-7466 and CVE-2017-7481 issues were discovered by Evgeni Golov
(Red Hat) and the CVE-2017-7473 issue was discovered by David Moreau Simard
(Red Hat).

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/):

1439212 - CVE-2017-7466 ansible: Arbitrary code execution on control node (incomplete fix for CVE-2016-9587)
1440912 - CVE-2017-7473 ansible: Potential information disclosure via no_log directive
1450018 - CVE-2017-7481 ansible: Security issue with lookup return not tainting the jinja2 environment

6. Package List:

Red Hat OpenStack Platform 11.0:

Source:
ansible-2.2.3.0-1.el7.src.rpm

noarch:
ansible-2.2.3.0-1.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-2017-7466
https://access.redhat.com/security/cve/CVE-2017-7473
https://access.redhat.com/security/cve/CVE-2017-7481
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2017 Red Hat, Inc.
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