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V-258105

CAT II (Medium)

RHEL 9 passwords must have a 24 hours minimum password lifetime restriction in /etc/shadow.

Rule ID

SV-258105r1045212_rule

STIG

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-004066 CCI-000198

Discussion

Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse.

Check Content

Verify that RHEL 9 has configured the minimum time period between password changes for each user account as one day or greater with the following command:

$ sudo awk -F: '$4 < 1 {printf "%s %d\n", $1, $4}' /etc/shadow

If any results are returned that are not associated with a system account, this is a finding.

Fix Text

Configure noncompliant accounts to enforce a 24 hour minimum password lifetime:

$ sudo passwd -n 1 [user]