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Date: Fri, 11 Jan 2019 15:07:54 +0100
From: Micha Borrmann <micha.borrmann@...s.de>
To: <bugtraq@...urityfocus.com>
Subject: [SYSS-2018-042] XSS in HMS Netbiter WS100 - CVE-2018-19694

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Hash: SHA256

Advisory ID:               SYSS-2018-042
Product:                   Netbiter WS100
Manufacturer:              HMS Industrial Networks AB
Affected Version(s):       3.30.5 <= 
Tested Version(s):         3.30.5 
Vulnerability Type:        Cross-Site Scripting (CWE-79)
Risk Level:                Low
Solution Status:           Fixed
Manufacturer Notification: 2018-11-29
Solution Date:             2018-12-20
Public Disclosure:         2019-01-11
CVE Reference:             CVE-2018-19694
Authors of Advisory:       Micha Borrmann (SySS GmbH)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Overview:

Netbiter WS100 is a remote management solution for industrial control
(e.g. emergency generators) (see [1]).

Due to improper input validation, the web-based remote management
solution is vulnerable to reflected cross-site scripting attacks.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Vulnerability Details:

The login form reflects values from parameters without any kind of
filtering or escaping.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Proof of Concept (PoC):

The following attack vector exemplarily demonstrates the described
reflected cross-site scripting vulnerability:

http://$TARGET/cgi-bin/write.cgi?page=%22;document.write(%27%3Ch1%3EXSS%20Demonstration%3C/h1%3E%27)//

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Solution:

Install the provided security patch (see [2]).

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Disclosure Timeline:

2018-11-29: Detection of the vulnerability
2018-11-29: CVE number assigned
2018-12-03: Vulnerability reported to manufacturer
2018-12-20: Security patch was released from the vendor
2019-01-11: Public release of the security advisory

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

References:
[1] Product web site
    https://www.netbiter.com/support/file-doc-downloads/netbiter-ws100
[2] HMS Security Advisory Report HMSSAR-2018-12-04-001
    https://www.hms-networks.com/docs/librariesprovider6/cybersecurity/hms-security-advisory-2018-12-04-001-ec150-ec250-lc310-lc350-ws100-ws200-cve-2018-19694.pdf
[3] SySS Security Advisory SYSS-2018-042
    https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-042.txt
[4] SySS Responsible Disclosure Policy
    https://www.syss.de/en/responsible-disclosure-policy/

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Credits:

This security vulnerability was found by Micha Borrmann of SySS GmbH.

E-Mail: micha.borrmann (at) syss.de
Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Micha_Borrmann.asc
Key Fingerprint: F2E7 C6A5 9950 84ED 7AD6  0DD4 EDBE 26E7 14EA 5876

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Disclaimer:

The information provided in this security advisory is provided "as is"
and without warranty of any kind. Details of this security advisory
may be updated in order to provide as accurate information as
possible. The latest version of this security advisory is available on
the SySS Web site.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Copyright:

Creative Commons - Attribution (by) - Version 3.0
URL: http://creativecommons.org/licenses/by/3.0/deed.en
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