When Authenticating Using Smart-Cards, crond Fails for All Users In Red Hat Enterprise Linux 6

Issue

• When trying to access the crontab for root or any other user the following error occurs:

Failure setting user credentials
You (root) are not allowed to access to (crontab) because of pam configuration.
[root@server scripts]# tail /var/log/cron
Nov  5 13:20:01 localhost crond[2504]: (root) FAILED to authorize user with PAM (Failure setting user credentials)
Nov  5 13:30:01 localhost crond[2537]: (root) FAILED to authorize user with PAM (Failure setting user credentials)
...