Users must not be able to change passwords more than once every 24 hours.

From SUSE Linux Enterprise Server v11 for System z

Part of GEN000540

Associated with: CCI-000198

SV-44859r1_rule Users must not be able to change passwords more than once every 24 hours.

Vulnerability discussion

The ability to change passwords frequently facilitates users reusing the same password. This can result in users effectively never changing their passwords. This would be accomplished by users changing their passwords when required and then immediately changing it to the original value.

Check content

Check the minimum time period between password changes for each user account is 1 day. # cat /etc/shadow | cut -d ':' -f 4 | grep -v 1 If any results are returned, this is a finding.

Fix text

Change the minimum time period between password changes for each user account to 1 day. # passwd -n 1

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