Http Vulnerability reported, Valid Directory Determination

Issue

Hi Redhat Team,

We are currently facing vulnerability on below redhat supported version of apache.

Version : 2.2.3 Vendor: Red Hat, Inc.
Release : 63.el5_8.1

Vulnerability reported:

6. Valid Directory Determination
   The web server allowed the verification of existing directories based on deterministic error messages returned when a default index file was not present within the requested directory. Any directory that did not contain a default index file was vulnerable. An example directory is listed below.

Please let us know how to fix this vulnerability.