Receiving 'cups-insecure-filter' in RHEL

Issue

• In system-config-printer, each printer has an exclamation mark on it. The error message is

  Printer 'printer': 'cups-insecure-filter'
  

• When a printer is configured to use backend, below error messages appear in the cups log file:

  E [27/Nov/2013:13:14:50 -0500] Unable to execute /usr/lib/cups/backend/email: insecure file permissions (0100777)
  E [27/Nov/2013:13:14:50 -0500] [Job 86] Stopping job because the scheduler could not execute the backend.
  

• Jobs aren't printing and see the following errors in the systemd journal:

  Sep 30 10:57:39 cupsd[359439]: lp19: Directory "/usr/lib/cups/filter" has insecure permissions (040775/uid=0/gid=0).
  Sep 30 10:57:39 cupsd[359439]: Unable to start filter "texttotext" - Success.
  Sep 30 10:57:39 cupsd[359439]: Stopping job because the scheduler could not execute a filter.