{"id":"CVE-2017-20002","aliases":["DEBIAN-CVE-2017-20002","DLA-2596-1","EUVD-2017-11017","GHSA-2m59-rw4g-9g7x","UBUNTU-CVE-2017-20002"],"status":"published","title":"The Debian shadow package before 4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical...","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00404,"percentile":0.34923,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269"],"published":"2021-03-17T00:00:00Z","modified":"2026-10-24T10:30:20Z","fixes":[{"ecosystem":"Debian:12","package":"shadow","fixed_in":["1:4.5-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"shadow","fixed_in":["1:4.5-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"shadow","fixed_in":["1:4.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"shadow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.5-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"shadow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.5-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"shadow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.5-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"shadow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.4-4.1+deb9u1"}]}],"versions":["1:4.4-4.1"],"bundled":2}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"debian","product":"shadow"}],"references":[{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374","tags":["x_refsource_MISC","x_transferred","Mailing List","Vendor Advisory","advisory","report"]},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Vendor Advisory","evidence","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-20002"},{"url":"https://github.com/advisories/GHSA-2m59-rw4g-9g7x"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-20002","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-20002","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-20002","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-20002","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2021-03-17T06:00:09Z","modified":"2024-08-05T21:45:24.409Z","updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2017-11017","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2021-03-17T06:00:09Z","modified":"2024-08-05T21:45:24Z","updated_at":"2026-11-03T02:23:04.143753Z"}],"ghsa":[{"id":"GHSA-2m59-rw4g-9g7x","title":"The Debian shadow package before 4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical...","description":"The Debian shadow package before 4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2022-05-24T17:44:39Z","modified":"2023-01-29T05:06:05Z","cwes":["CWE-269"],"updated_at":"2026-11-02T14:45:56.584389Z"}],"nvd":[{"id":"CVE-2017-20002","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2021-03-17T06:15:12.107Z","modified":"2026-06-17T01:14:54.317Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:04:21.160774Z"}],"osv":[{"id":"CVE-2017-20002","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2021-03-17T06:15:12.107Z","modified":"2026-10-24T10:30:20.976417146Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:05.486486Z"},{"id":"DEBIAN-CVE-2017-20002","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"published","published":"2021-03-17T06:15:12.107Z","modified":"2026-09-01T20:03:47.200991016Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:29.100767Z"},{"id":"UBUNTU-CVE-2017-20002","description":"The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.","status":"withdrawn","published":"2021-03-17T06:15:00Z","modified":"2025-07-16T07:36:32.632045Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:14.977781Z"},{"id":"DLA-2596-1","title":"shadow - security update","status":"published","published":"2021-03-17T00:00:00Z","modified":"2026-03-09T01:22:13.826938Z","updated_at":"2026-11-02T15:46:10.712745Z"}]}}