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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-19-190-04) Siemens Spectrum Power
10 July 2019
AusCERT Security Bulletin Summary
Product: Siemens Spectrum Power
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
CVE Names: CVE-2019-10933
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ICS Advisory (ICSA-19-190-04)
Siemens Spectrum Power
Original release date: July 09, 2019
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1. EXECUTIVE SUMMARY
o CVSS v3 4.7
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Siemens
o Equipment: Spectrum Power
o Vulnerability: Cross-site Scripting
3. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to inject
arbitrary code in a specially crafted HTTP request and monitor information.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
Siemens reports the following versions of Siemens Spectrum Power are affected:
o Spectrum Power 3 (Corporate User Interface): versions v3.11 and prior
o Spectrum Power 4 (Corporate User Interface): version v4.75
o Spectrum Power 5 (Corporate User Interface): versions v5.50 and prior
o Spectrum Power 7 (Corporate User Interface): versions v2.20 and prior
4.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
The web server could allow cross-site scripting (XSS) attacks if unsuspecting
users are tricked into accessing a malicious link.
User interaction is required for a successful exploitation. The user does not
need to be logged into the web interface for the exploitation to succeed.
CVE-2019-10933 has been assigned to this vulnerability. A CVSS v3 base score of
4.7 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C/C:N/
o CRITICAL INFRASTRUCTURE SECTORS: Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
Ismail Mert AY AK of Biznet Bilisim Sistemleri Danismanlik reported this
vulnerability to NCCIC.
Siemens recommends installing the software update to address the vulnerability.
Please contact Siemens Energy Customer Support Center at:
firstname.lastname@example.org or the local Siemens representative.
Siemens has identified the following specific workarounds and mitigations that
users can apply to reduce the risk:
o Do not allow Internet access for Spectrum Power UI clients.
o Users should be trained to avoid clicking on unknown links.
Siemens strongly recommends applying the provided security updates using the
corresponding tooling and documented procedures made available with the
product. If supported by the product, an automated means to apply the security
updates across multiple product instances may be used. Siemens strongly
recommends prior validation of any security update before applied and
supervision by trained staff of the update process in the target environment.
As a general security measure Siemens strongly recommends protecting network
access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is
advised to configure the environment according to Siemens' operational
guidelines in order to run the devices in a protected IT environment.
Additional information on Industrial Security by Siemens can be found at:
For more information on this vulnerability and more detailed mitigation
instructions, please see Siemens security advisory SSA-747162 at the following
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC 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
on the ICS-CERT website in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
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