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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0557
                           Siemens RUGGEDCOM NMS
                               2 March 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Siemens RUGGEDCOM NMS
Publisher:         Siemens
Operating System:  Linux variants
                   Windows
Impact/Access:     Cross-site Request Forgery -- Remote with User Interaction
                   Cross-site Scripting       -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-2683 CVE-2017-2682 

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-059-01

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Advisory (ICSA-17-059-01)

Siemens RUGGEDCOM NMS

Original release date: February 28, 2017

All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the
header. For more information about TLP, see http://www.us-cert.gov/tlp/.

CVSS v3 8.8

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Siemens

Equipment: RUGGEDCOM NMS

Vulnerabilities: Cross-Site Request Forgery, Cross-Site Scripting.

AFFECTED PRODUCTS

Siemens reports that the vulnerability affects the following RUGGEDCOM
monitoring products:

    RUGGEDCOM NMS: All versions prior to V2.1.0 (Windows and Linux).

IMPACT

Successful exploitation of these vulnerabilities could allow a remote
attacker to perform administrative operations under certain conditions.

MITIGATION

Siemens provides RUGGEDCOM NMS V2.1.0 which fixes the vulnerabilities and
recommends users update to the new version. Information on how to obtain
the latest RUGGEDCOM software and firmware can be found at the following
location on the Siemens web site:

https://support.industry.siemens.com/cs/ww/en/view/109745179 (link is
external)

For more information on this vulnerability and more detailed mitigation
instructions, please see Siemens Security Advisory SSA-363881 at the
following location:

http://www.siemens.com/cert/en/cert-security-advisories.htm (link is
external)

As a general security measure Siemens strongly recommends protecting network
access to the RUGGEDCOM NMS with appropriate mechanisms and configuring
the environment according to Siemens’ operational guidelines in order
to run the devices in a protected IT environment.

https://www.siemens.com/cert/operational-guidelines-industrial-security
(link is external)

NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:

    Minimize network exposure for all control system devices and/or systems,
    and ensure that they are not accessible from the Internet.
    Locate control system networks and remote devices behind firewalls,
    and isolate them from the business network.
    When remote access is required, use secure methods, such as Virtual
    Private Networks (VPNs), recognizing that VPNs may have vulnerabilities
    and should be updated to the most current version available. Also
    recognize that VPN is only as secure as the connected devices.

ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended
practices on the ICS-CERT web page. Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are
publicly available in the ICS‑CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.

Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. These
vulnerabilities are not remotely exploitable.

VULNERABILITY OVERVIEW

CROSS-SITE REQUEST FORGERY (CSRF) CWE-352

The web application (Ports 8080/TCP and 8081/TCP) could allow a remote
attacker to perform a cross-site request forgery (CSRF) attack, potentially
allowing an attacker to execute administrative operations, provided the
targeted user has an active session and is induced to trigger a malicious
request.

CVE-2017-2682 has been assigned to this vulnerability. A CVSS v3
base score of 8.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CROSS-SITE SCRIPTING CWE-79

A non-privileged user of the web application (Ports 8080/TCP and 8081/TCP)
could perform a persistent cross-site scripting (XSS) attack, potentially
resulting in acquisition of administrative permissions.

CVE-2017-2683 has been assigned to this vulnerability. A CVSS v3
base score of 6.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N).

BACKGROUND

Critical Infrastructure Sectors: Energy, Healthcare and Public Health,
and Transportation Systems

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Germany

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900

For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov

ICS-CERT continuously strives to improve its products and services. You
can help by choosing one of the links below to provide feedback about
this product.

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