{"id":"CVE-2017-8900","aliases":["EUVD-2017-17840","GHSA-2r8v-9m34-p378"],"status":"published","title":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically...","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","severity":{"version":"3.0","score":4.6,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00418,"percentile":0.36421,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2017-05-12T06:54:00Z","modified":"2026-10-24T10:30:42Z","products":[{"vendor":"lightdm_project","product":"lightdm"}],"references":[{"url":"http://www.securityfocus.com/bid/98554","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://www.ubuntu.com/usn/usn-3285-1/","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://launchpad.net/bugs/1663157","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Vendor Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-8900"},{"url":"https://www.ubuntu.com/usn/usn-3285-1"},{"url":"https://github.com/advisories/GHSA-2r8v-9m34-p378"}],"sources":{"cve":[{"id":"CVE-2017-8900","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","status":"published","published":"2017-05-12T06:54:00Z","modified":"2024-08-05T16:48:22.897Z","updated_at":"2026-11-02T14:33:14.89365Z"}],"euvd":[{"id":"EUVD-2017-17840","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","status":"published","published":"2017-05-12T06:54:00Z","modified":"2024-08-05T16:48:22Z","updated_at":"2026-11-03T02:23:29.67797Z"}],"ghsa":[{"id":"GHSA-2r8v-9m34-p378","title":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically...","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","status":"published","published":"2022-05-13T01:47:44Z","modified":"2025-04-20T03:38:30Z","cvss":[{"version":"3.0","score":4.6,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:01:46.283604Z"}],"nvd":[{"id":"CVE-2017-8900","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","status":"published","published":"2017-05-12T07:29:00.233Z","modified":"2026-06-17T01:27:10.273Z","cvss":[{"version":"3.0","score":4.6,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:03:47.848196Z"}],"osv":[{"id":"CVE-2017-8900","description":"LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.","status":"published","published":"2017-05-12T07:29:00.233Z","modified":"2026-10-24T10:30:42.289237178Z","cvss":[{"version":"3.0","score":4.6,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:06.868403Z"}]}}