RHSA-2017:2557 - Security Advisory

Topic

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.

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).

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

Affected Products

• Red Hat OpenStack 9 x86_64

Fixes

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

CVEs

• CVE-2017-7549

References

• https://access.redhat.com/security/updates/classification/#moderate