Description
A flaw was found in instack-undercloud 7.2.0 as packaged in Red Hat OpenStack Platform Pike, 6.1.0 as packaged in Red Hat OpenStack Platform Oacta, 5.3.0 as packaged in Red Hat OpenStack Newton, 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | instack-undercloud | Pike, 12: v7.2.0, Ocata, 11: v6.1.0, Newton, 10: v5.3.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Openstack-director 9 | instack-undercloud | 4.0.0-17.el7ost | RHSA-2017:2557 |
| Red Hat Openstack-director 8 | instack-undercloud | 2.2.7-10.el7ost | RHSA-2017:2687 |
| Red Hat Openstack-director 7 | instack-undercloud | 2.1.2-41.el7ost | RHSA-2017:2693 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 11 | instack-undercloud | 6.1.0-3.el7ost | RHSA-2017:2726 |
| Red Hat OpenStack 10 | instack-undercloud | 5.3.0-3.el7ost | RHSA-2017:2649 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | instack | <= 7.2.0 · <= 6.1.0 · <= 5.3.0 | — | PYSEC-2017-152 |
| PyPI | instack-undercloud | <= 7.2.0 | — | GHSA-53wm-97p6-582f |
Advisories 5
- RHSA-2017:2726 Red Hat Security Advisory: instack-undercloud security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:2693 Red Hat Security Advisory: instack-undercloud security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:2687 Red Hat Security Advisory: instack-undercloud security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:2649 Red Hat Security Advisory: instack-undercloud security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:2557 Red Hat Security Advisory: instack-undercloud security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
References
- RHSA-2017:2726 vendor-advisory
- 100407 vdb-entry
- RHSA-2017:2649 vendor-advisory
- RHSA-2017:2687 vendor-advisory
- RHSA-2017:2557 vendor-advisory
- RHSA-2017:2693 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1477403