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AUSCERT External Security Bulletin Redistribution
ESB-2017.2234
Moderate: instack-undercloud security, bug fix, and enhancement update
7 September 2017
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AusCERT Security Bulletin Summary
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Product: instack-undercloud
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Overwrite Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-7549
Reference: ESB-2017.2169
Original Bulletin:
https://access.redhat.com/errata/RHSA-2017:2649
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Red Hat Security Advisory
Synopsis: Moderate: instack-undercloud security, bug fix, and enhancement update
Advisory ID: RHSA-2017:2649-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:2649
Issue date: 2017-09-06
CVE Names: CVE-2017-7549
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1. Summary:
An update for instack-undercloud is now available for Red Hat OpenStack
Platform 10.0 (Newton).
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:
Red Hat OpenStack Platform 10.0 - noarch
3. Description:
instack-undercloud provides a collection of scripts and elements that can
be used to install an OpenStack undercloud (using python-instack).
The following packages have been upgraded to a later upstream version:
instack-undercloud (5.3.0). (BZ#1479841)
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/):
1465616 - stackrc does not undefine OS_ env vars
1477403 - CVE-2017-7549 instack-undercloud: uses hardcoded /tmp paths
1479841 - Rebase instack-undercloud to e9a5137
6. Package List:
Red Hat OpenStack Platform 10.0:
Source:
instack-undercloud-5.3.0-3.el7ost.src.rpm
noarch:
instack-undercloud-5.3.0-3.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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