{"cve":"CVE-2017-20002","nvd":{"published":"2021-03-17T06:15:12.107","modified":"2026-06-17T01:14:54.317","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-269"],"references":["https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374","https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957","https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html","https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374","https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957"],"products":["debian:debian_linux","debian:shadow"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2017-20002","score":0.00404,"percentile":0.34698,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}