CVEvulnerability

CVE-2017-20002

7.8 HIGH Published 2021-03-17 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-03-17
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-269

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.

Affected configurations

• debian shadow 4.4 • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-269 Improper Privilege Management weakness

References