{"id":"USN-3748-1","summary":"base-files vulnerability","details":"Sander Bos discovered that the MOTD update script incorrectly handled\ntemporary files. A local attacker could use this issue to cause a denial of\nservice, or possibly escalate privileges if kernel symlink restrictions\nwere disabled.\n","modified":"2026-02-10T04:41:23Z","published":"2018-08-21T12:20:12Z","related":["UBUNTU-CVE-2018-6557"],"upstream":["CVE-2018-6557","UBUNTU-CVE-2018-6557"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3748-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-6557"}],"affected":[{"package":{"name":"base-files","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/base-files@10.1ubuntu2.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.1ubuntu2.2"}]}],"versions":["9.6ubuntu102","10ubuntu1","10.1ubuntu1","10.1ubuntu2","10.1ubuntu2.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"base-files","binary_version":"10.1ubuntu2.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3748-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2018-6557"}]}}}],"schema_version":"1.7.3"}