SLEM 5 must enforce a delay of at least five seconds between logon prompts following a failed logon attempt via pluggable authentication modules (PAM).

Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account.

Verify SLEM 5 enforces a delay of at least five seconds between logon prompts following a failed logon attempt with the following command:

     > grep pam_faildelay /etc/pam.d/common-auth
     auth required pam_faildelay.so delay=5000000

If the value of "delay" is not set to "5000000" or greater, "delay" is missing, the line is commented out, or the "pam_faildelay" line is missing completely, this is a finding.

Configure SLEM 5 to enforce a delay of at least five seconds between logon prompts following a failed logon attempt.

Add or modify the following line in the "/etc/pam.d/common-auth" file:

auth required pam_faildelay.so delay=5000000