{"id":"CVE-2018-6557","details":"The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.","modified":"2026-03-14T14:20:05.490378Z","published":"2018-08-21T16:29:00.637Z","references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105148"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1041530"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3748-1/"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"10.1ubuntu2.2"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6557.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}