{"id":"UBUNTU-CVE-2018-12021","details":"Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.","modified":"2026-02-04T02:27:05.389138Z","published":"2018-07-05T18:29:00Z","related":["USN-4840-1"],"upstream":["CVE-2018-12021"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-12021"},{"type":"REPORT","url":"https://github.com/singularityware/singularity/releases/tag/2.5.2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4840-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-12021"}],"affected":[{"package":{"name":"singularity-container","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/singularity-container@2.4.2-4ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.2-4ubuntu0.1~esm1"}]}],"versions":["2.3.1-2","2.3.2-1","2.4.1-1","2.4.2-2","2.4.2-3","2.4.2-4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"singularity-container","binary_version":"2.4.2-4ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12021.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}