The system must prohibit the reuse of passwords within five iterations.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Part of GEN000800

Associated with: CCI-000200

SV-44884r1_rule The system must prohibit the reuse of passwords within five iterations.

Vulnerability discussion

If a user, or root, used the same password continuously or was allowed to change it back shortly after being forced to change it to something else, it would provide a potential intruder with the opportunity to keep guessing at one user's password until it was guessed correctly.

Check content

# pam-config -q --pwhistory If the result is not’ password: remember=5’ or higher, then this is a finding. # ls /etc/security/opasswd If /etc/security/opasswd does not exist, then this is a finding. # grep password /etc/pam.d/common-password| grep pam_pwhistory.so | grep remember If the "remember" option in /etc/pam.d/common-password is not 5 or greater, this is a finding.

Fix text

Create the password history file. # touch /etc/security/opasswd # chown root:root /etc/security/opasswd # chmod 0600 /etc/security/opasswd Configure pam to use password history. # pam-config -a --pwhistory # pam-config -a --pwhistory-remember=5

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.

Powered by sagemincer