Carrierwave s3 403 (Forbidden) error

Question

I'm trying to get carrierwave to work with Amazon S3 (in my Rails 4 app), I use fog gem to upload the images to s3.

I'm currently successfully able to upload the files to my bucket. But I cannot get the images back. server is giving 403 (Forbidden) error

However if I check the image, it's there uploaded in S3. My image path would be something like

https://<bucket name>.s3.amazonaws.com/uploads/image/picture/8/card_34676_l.jpg&Signature=<signature>&Expires=<expires>

Following is my carrierwave config

CarrierWave.configure do |config|
  config.fog_credentials = {
    :provider               => 'AWS',
    :aws_access_key_id      => '<key>',
    :aws_secret_access_key  => '<access key>',
  }
  config.fog_directory  = '<bucket name>' 
  config.fog_public     = false  
  config.fog_attributes = {'Cache-Control'=>"max-age=#{365.day.to_i}"} # optional, defaults to {}
end

and I have setup the default grantee permission to everyone with

• list
• upload/delete
• view permissions

and have a default CORS Configuration setup

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <CORSRule>
        <AllowedOrigin>*</AllowedOrigin>
        <AllowedMethod>GET</AllowedMethod>
        <MaxAgeSeconds>3000</MaxAgeSeconds>
        <AllowedHeader>Authorization</AllowedHeader>
    </CORSRule>
</CORSConfiguration>

What could be missing?