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HomeSeer HS2 web interface multiple vulnerabilities

Vulnerability Note VU#796883

Original Release Date: 2011-12-08 | Last Revised: 2012-01-12

Overview

HomeSeer HS2 home automation software web interface contains multiple vulnerabilities.

Description

According to HomeSeer's website, "HomeSeer HS2 is an advanced home automation and remote access software package that is designed to integrate the major systems of any home". The HomeSeer HS2 home automation software webserver contains multiple vulnerabilities. HomeSeer HS2 2.5.0.20, and possibly prior versions, includes a web interface which contains a directory traversal vulnerability which could allow an attacker to access files outside of the web directory. In addition the HomeSeer HS2 web interface is vulnerable to a stored and reflective cross site scripting (XSS) vulnerability. An attacker can request a web page such as http://ipaddress/example<script>alert(document.cookie)</script>, causing the JavaScript to be stored in the log viewer page. The next time an administrator or user within the web application views the logfile (http://ipaddress/elog), the JavaScript will be executed in their browser session. The HomeSeer HS2 web interface is also vulnerable to cross-site request forgery (CSRF) attacks with within the /ctrl URL. A successful CSRF attack against an admin user will allow a remote attacker to run commands as the admin user, including remotely launching known executable files on the system.

Impact

An attacker with access to the HomeSeer HS2 web interface can conduct a cross site scripting attack, which could be used to result in information leakage, privilege escalation, and/or denial of service. In addition an attacker with network access to the HomeSeer HS2 web server may also be able to run system commands, inject arbitrary data, or download arbitrary files.

Solution

This has been reported to be addressed in HomeSeer HS2 2.5.0.49 or later.

Restrict access

As a general good security practice, only allow connections from trusted hosts and networks. Note that restricting access does not prevent XSS or CSRF attacks since the attack comes as an HTTP request from a legitimate user's host. Restricting access would prevent an attacker from accessing a HomeSeer HS2 using stolen credentials from a blocked network location.

Vendor Information

796883
 
Affected   Unknown   Unaffected

HomeSeer

Notified:  November 07, 2011 Updated:  January 12, 2012

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

This has been reported to be addressed in HomeSeer HS2 2.5.0.49 or later.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Silent Dream for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs: None
Severity Metric: 0.11
Date Public: 2011-12-08
Date First Published: 2011-12-08
Date Last Updated: 2012-01-12 18:01 UTC
Document Revision: 9

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.