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Debian: CVE-2017-20002: shadow -- security update

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Debian: CVE-2017-20002: shadow -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
03/17/2021
Created
03/19/2021
Added
03/19/2021
Modified
03/25/2021

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.

Solution(s)

  • debian-upgrade-shadow

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