Improper Privilege Management Affecting shadow package, versions <1:4.5-1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High
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NVD
7.8 high

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  • Snyk ID SNYK-DEBIAN10-SHADOW-1086624
  • published 17 Mar 2021
  • disclosed 17 Mar 2021

How to fix?

Upgrade Debian:10 shadow to version 1:4.5-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Debian:10. See How to fix? for Debian:10 relevant fixed versions and status.

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.

References