{"id":"CVE-2018-20839","aliases":["DEBIAN-CVE-2018-20839","EUVD-2018-13379","GHSA-5cwj-wmj7-j224"],"status":"published","title":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext...","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02478,"percentile":0.84671,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2019-05-17T03:39:01Z","modified":"2026-10-24T10:47:25Z","fixes":[{"ecosystem":"Debian:12","package":"plymouth","fixed_in":["0.9.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"plymouth","fixed_in":["0.9.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"plymouth","fixed_in":["0.9.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"plymouth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"plymouth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"plymouth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.4-1"}]}]}],"products":[{"vendor":"netapp","product":"cn1610_firmware"},{"vendor":"netapp","product":"snapprotect"},{"vendor":"netapp","product":"solidfire_\\\u0026_hci_management_node"},{"vendor":"systemd_project","product":"systemd"}],"references":[{"url":"https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/systemd/systemd/pull/12378","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","fix"]},{"url":"http://www.securityfocus.com/bid/108389","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20190530-0002/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20839"},{"url":"https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"},{"url":"https://security.netapp.com/advisory/ntap-20190530-0002"},{"url":"https://github.com/advisories/GHSA-5cwj-wmj7-j224"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-20839","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2018-20839","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2019-05-17T03:39:01Z","modified":"2024-08-05T12:12:29.348Z","updated_at":"2026-11-02T14:34:59.872731Z"}],"euvd":[{"id":"EUVD-2018-13379","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2019-05-17T03:39:01Z","modified":"2024-08-05T12:12:29Z","updated_at":"2026-11-03T02:39:29.769885Z"}],"ghsa":[{"id":"GHSA-5cwj-wmj7-j224","title":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext...","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2022-05-24T16:45:59Z","modified":"2024-04-04T00:41:37Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:55:51.119563Z"}],"nvd":[{"id":"CVE-2018-20839","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2019-05-17T04:29:00.933Z","modified":"2026-06-17T01:53:34.263Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:57.307075Z"}],"osv":[{"id":"CVE-2018-20839","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2019-05-17T04:29:00.933Z","modified":"2026-10-24T10:47:25.291350644Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:09.145458Z"},{"id":"DEBIAN-CVE-2018-20839","description":"systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.","status":"published","published":"2019-05-17T04:29:00.933Z","modified":"2026-10-23T18:03:21.276717058Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:30.867575Z"}]}}