{"id":"CVE-2017-7549","aliases":["GHSA-53wm-97p6-582f","PYSEC-2017-152","PYSEC-2026-645"],"url":"https://o3.security/vulnerability/CVE-2017-7549","summary":"instack-undercloud vulnerable to symlink attack on tmp files","details":"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.","published":"2017-09-21T21:29:00.447Z","modified":"2026-08-27T08:18:46.041856Z","cvss":{"score":6.4,"severity":"MEDIUM","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"instack-undercloud","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/100407"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2557"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2649"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2687"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2693"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:2726"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1477403"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7549"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2017-7549"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/instack/PYSEC-2017-152.yaml"},{"type":"WEB","url":"https://opendev.org/openstack/instack-undercloud"},{"type":"WEB","url":"https://web.archive.org/web/20170907040549/http://www.securityfocus.com/bid/100407"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T08:18:46.041856Z"}}