{"id":"CVE-2017-7549","aliases":["GHSA-53wm-97p6-582f","PYSEC-2017-152","PYSEC-2026-645"],"title":"instack-undercloud vulnerable to symlink attack on tmp files","summary":"instack-undercloud vulnerable to symlink attack on tmp files","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","vendor":"instack-undercloud","product":"instack-undercloud","ecosystem":"pip","affected":["instack-undercloud <= 7.2.0"],"published":"2022-05-13","updated":"2026-07-06","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-53wm-97p6-582f","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7549"},{"url":"https://access.redhat.com/errata/RHSA-2017:2557"},{"url":"https://access.redhat.com/errata/RHSA-2017:2649"},{"url":"https://access.redhat.com/errata/RHSA-2017:2687"},{"url":"https://access.redhat.com/errata/RHSA-2017:2693"},{"url":"https://access.redhat.com/errata/RHSA-2017:2726"},{"url":"https://access.redhat.com/security/cve/CVE-2017-7549"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1477403"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/instack/PYSEC-2017-152.yaml"},{"url":"https://opendev.org/openstack/instack-undercloud"},{"url":"https://web.archive.org/web/20170907040549/http://www.securityfocus.com/bid/100407"},{"url":"http://www.securityfocus.com/bid/100407"}],"tags":["osv","pip"],"epss":0.0035,"epssPercentile":0.28685,"ingestedAt":"2026-07-08T18:25:45.754Z","slug":"CVE-2017-7549","body":"## Overview\n\nA 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.\n\n## Affected packages\n\n- `instack-undercloud <= 7.2.0`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}