The default configuration for the web (/var/www/html) Directory allows directory
indexing (Indexes) and the following of symbolic links (FollowSymLinks).
Neither of these is recommended.
The /var/www/html directory hierarchy should not be viewable via the web, and
symlinks should only be followed if the owner of the symlink also owns the linked file.
Ensure that this policy is adhered to by altering the related section of the configuration:
<Directory "/var/www/html">
# ...
Options SymLinksIfOwnerMatch
# ...
</Directory>