The SUSE operating system must employ user passwords with a minimum lifetime of 24 hours (1 day).

From SLES 12 Security Technical Implementation Guide

Associated with: CCI-000198

SV-91809r1_rule The SUSE operating system must employ user passwords with a minimum lifetime of 24 hours (1 day).

Vulnerability discussion

Enforcing a minimum password lifetime helps 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 the SUSE operating system enforces a minimum time period between password changes for each user account of "1" day or greater. Check the minimum time period between password changes for each user account with the following command: # sudo cat /etc/shadow | cut -d ':' -f1,4 | grep -v 1 | grep -v ":$" smithj:1 If any account has a value of "0", this is a finding.

Fix text

Configure the SUSE operating system to enforce 24 hours/1 day or greater as the minimum password age for user accounts. Change the minimum time period between password changes for each [USER] account to "1" day with the command, replacing [USER] with the user account that must be changed: # sudo passwd -n 1 [USER]

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