{"id":"CVE-2018-12021","aliases":["EUVD-2022-2468","GHSA-4x32-h296-rg6j","UBUNTU-CVE-2018-12021","USN-4840-1","openSUSE-SU-2018:1969-1","openSUSE-SU-2019:0095-1","openSUSE-SU-2024:11384-1"],"status":"published","title":"Singularity Incorrect Access Control","description":"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.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01465,"percentile":0.73874,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2018-07-05T18:00:00Z","modified":"2026-10-24T10:47:37Z","fixes":[{"ecosystem":"Go","package":"github.com/hpcng/singularity","fixed_in":["2.5.2"],"sources":["ghsa","osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"singularity-container","fixed_in":["2.4.2-4ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"SUSE:Package Hub 12 SP3","package":"singularity","fixed_in":["2.3.2-11.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/hpcng/singularity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.0"},{"last_affected":"2.5.1"},{"fixed":"2.5.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/hpcng/singularity","ranges":[{"type":"SEMVER","events":[{"introduced":"2.3.0"},{"fixed":"2.5.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"singularity-container","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"singularity-container","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"],"bundled":2},{"source":"osv","ecosystem":"SUSE:Package Hub 12 SP3","package":"singularity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2-11.1"}]}]},{"source":"osv","ecosystem":"SUSE:Package Hub 12 SP3","package":"singularity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1-14.1"}]}],"bundled":2},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"singularity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.3-1.2"}]}],"bundled":12}],"products":[{"vendor":"sylabs","product":"singularity"}],"references":[{"url":"https://github.com/singularityware/singularity/releases/tag/2.5.2","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Third Party Advisory","advisory","web","report"]},{"url":"http://www.openwall.com/lists/oss-security/2019/05/16/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-12021","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4x32-h296-rg6j"},{"url":"https://github.com/singularityware/singularity","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2018-12021","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4840-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-12021","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-19295","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/BVVOAO2DTGDEH4FUXRM34QLEZB7OALKO/#BVVOAO2DTGDEH4FUXRM34QLEZB7OALKO","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1100333","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-12021","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/KH5E4NYDJ6ZUYYZSVAG3DF25JMTPPTBW/#KH5E4NYDJ6ZUYYZSVAG3DF25JMTPPTBW","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1111411","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19295","tags":["web"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2019-11328","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-19724","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13845","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13846","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13847","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15229","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-25039","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-25040","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29136","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-32635","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-12021","description":"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.","status":"published","published":"2018-07-05T18:00:00Z","modified":"2024-08-05T08:24:03.626Z","updated_at":"2026-11-02T14:35:06.679212Z"}],"euvd":[{"id":"EUVD-2022-2468","description":"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.","status":"published","published":"2018-07-05T18:00:00Z","modified":"2024-08-05T08:24:03Z","updated_at":"2026-11-03T02:39:53.575925Z"}],"ghsa":[{"id":"GHSA-4x32-h296-rg6j","title":"Singularity Incorrect Access Control ","description":"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.","status":"published","published":"2022-05-14T01:01:38Z","modified":"2023-10-06T15:25:57Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:37:08.278692Z"}],"nvd":[{"id":"CVE-2018-12021","description":"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.","status":"published","published":"2018-07-05T18:29:00.297Z","modified":"2026-06-17T01:37:00.72Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:L/Au:S/C:C/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:04:31.362791Z"}],"osv":[{"id":"CVE-2018-12021","description":"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.","status":"published","published":"2018-07-05T18:29:00.297Z","modified":"2026-10-24T10:47:37.850975693Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"GHSA-4x32-h296-rg6j","title":"Singularity Incorrect Access Control ","description":"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.","status":"published","published":"2022-05-14T01:01:38Z","modified":"2023-11-08T03:59:48.552215Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:46:37.528068Z"},{"id":"UBUNTU-CVE-2018-12021","description":"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.","status":"published","published":"2018-07-05T18:29:00Z","modified":"2026-02-04T02:27:05.389138Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"openSUSE-SU-2018:1969-1","title":"Security update for singularity","description":"This update for singularity fixes the following issues:\n\n- CVE-2018-12021: A race condition might have allowed malicious users to bypass directory image restrictions,\n  like mounting the host root filesystem as a container image (boo#1100333)\n","status":"published","published":"2018-07-16T09:52:20Z","modified":"2026-02-04T03:07:26.620648Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2019:0095-1","title":"Security update for singularity","description":"This update for singularity to version 2.6.1 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2018-19295: Mount points are not mounted with shared mount propagation by default anymore, as this may result in privilege escalation (boo#1111411).\n- CVE-2018-12021: Fixed a incorrect access control issues on systems supporting overlay file system (boo#1100333).\n","status":"published","published":"2019-01-29T08:15:08Z","modified":"2026-02-04T03:38:33.708162Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2024:11384-1","title":"singularity-3.8.3-1.2 on GA media","description":"These are all security issues fixed in the singularity-3.8.3-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:36:28.928556Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"USN-4840-1","title":"singularity-container vulnerabilities","description":"It was discovered that Singularity incorrectly handled certain inputs. An\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2018-19295)\n\nIt was discovered that Singularity incorrectly handled access control. An\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2018-12021)\n","status":"published","published":"2021-03-15T22:22:57Z","modified":"2026-02-10T04:42:06Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}