{"cve":"CVE-2017-7549","nvd":{"published":"2017-09-21T21:29:00.447","modified":"2026-06-17T01:24:35.360","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","score":6.4},"cwes":["CWE-377","CWE-59"],"references":["http://www.securityfocus.com/bid/100407","https://access.redhat.com/errata/RHSA-2017:2557","https://access.redhat.com/errata/RHSA-2017:2649","https://access.redhat.com/errata/RHSA-2017:2687","https://access.redhat.com/errata/RHSA-2017:2693"],"products":["openstack:instack-undercloud"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2017-7549","score":0.0035,"percentile":0.28637,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-53wm-97p6-582f","url":"https://osv.dev/vulnerability/GHSA-53wm-97p6-582f","summary":"instack-undercloud vulnerable to symlink attack on tmp files","modified":"2026-07-06T08:11:25.423894871Z","packages":[{"ecosystem":"PyPI","name":"instack-undercloud","purl":"pkg:pypi/instack-undercloud","ranges":["<=7.2.0"],"fixed":[]}]},{"id":"PYSEC-2017-152","url":"https://osv.dev/vulnerability/PYSEC-2017-152","summary":"","modified":"2026-07-06T08:11:25.423894871Z","packages":[{"ecosystem":"PyPI","name":"instack","purl":"pkg:pypi/instack","ranges":["<=7.2.0","<=6.1.0","<=5.3.0"],"fixed":[]}]},{"id":"PYSEC-2026-645","url":"https://osv.dev/vulnerability/PYSEC-2026-645","summary":"instack-undercloud vulnerable to symlink attack on tmp files","modified":"2026-07-06T08:11:25.423894871Z","packages":[{"ecosystem":"PyPI","name":"instack-undercloud","purl":"pkg:pypi/instack-undercloud","ranges":["<=7.2.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}