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Red Hat Security Advisory 2017-2557-01

Red Hat Security Advisory 2017-2557-01
Posted Aug 30, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2557-01 - instack-undercloud provides a collection of scripts and elements that can be used to install an OpenStack undercloud. Security Fix: A flaw was found in instack-undercloud where pre-install and security policy scripts used insecure temporary files. A local user could exploit this flaw to conduct a symbolic-link attack, allowing them to overwrite the contents of arbitrary files. This issue was discovered by Matthew Booth .

tags | advisory, arbitrary, local
systems | linux, redhat
advisories | CVE-2017-7549
MD5 | eb6549b47b20bcfae458faf55439236f

Red Hat Security Advisory 2017-2557-01

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

Synopsis: Moderate: instack-undercloud security update
Advisory ID: RHSA-2017:2557-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:2557
Issue date: 2017-08-30
CVE Names: CVE-2017-7549
=====================================================================

1. Summary:

An update for instack-undercloud is now available for Red Hat OpenStack
Platform 9.0 (Mitaka) director.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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:

OpenStack 9.0 Director for RHEL 7 - noarch

3. Description:

instack-undercloud provides a collection of scripts and elements that can
be used to install an OpenStack undercloud (using python-instack).

Security Fix(es):

* A flaw was found in instack-undercloud where pre-install and security
policy scripts used insecure temporary files. A local user could exploit
this flaw to conduct a symbolic-link attack, allowing them to overwrite the
contents of arbitrary files. (CVE-2017-7549)

This issue was discovered by Matthew Booth (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/):

1477403 - CVE-2017-7549 instack-undercloud: uses hardcoded /tmp paths

6. Package List:

OpenStack 9.0 Director for RHEL 7:

Source:
instack-undercloud-4.0.0-17.el7ost.src.rpm

noarch:
instack-undercloud-4.0.0-17.el7ost.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-2017-7549
https://access.redhat.com/security/updates/classification/#moderate

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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