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AUSCERT External Security Bulletin Redistribution
ESB-2016.1576
Schneider Electric PowerLogic PM8ECC Cross-site Scripting Vulnerability
22 June 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electrics PowerLogic PM8ECC
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-4513
Original Bulletin:
http://ics-cert.us-cert.gov/advisories/ICSA-16-173-02
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Advisory (ICSA-16-173-02)
Schneider Electric PowerLogic PM8ECC Cross-site Scripting Vulnerability
Original release date: June 21, 2016
Legal Notice
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/.
OVERVIEW
Schneider Electric has notified NCCIC/ICS-CERT of a Cross-site Scripting (XSS)
vulnerability in Schneider Electrics PowerLogic PM8ECC communications add-on
module for the Series 800 PowerMeter. Schneider Electric has produced a
firmware update to mitigate this vulnerability.
This vulnerability could be exploited remotely.
AFFECTED PRODUCTS
Schneider Electric reports that the vulnerability affects the following
versions of PowerLogic PM8ECC:
PowerLogic PM8ECC, firmware versions prior to Version 2.651
IMPACT
Successful exploitation of this vulnerability could allow an unauthenticated
attacker to inject arbitrary JavaScript in a specially crafted URL request
where the response containing user data is returned to the web browser without
being made safe to display.
Impact to individual organizations depends on many factors that are unique to
each organization. ICS-CERT recommends that organizations evaluate the impact
of this vulnerability based on their operational environment, architecture,
and product implementation.
BACKGROUND
Schneider Electrics corporate headquarters is located in Paris, France, and it
maintains offices in more than 100 countries worldwide.
The affected product, PowerLogic PM8ECC, is a communications add-on module for
the Series 800 PowerMeter. According to Schneider Electric, PowerLogic PM8ECC
is deployed in the Commercial Facilities sector. Schneider Electric estimates
that this product is used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
CROSS-SITE SCRIPTING [a]
This vulnerability could allow an unauthenticated attacker to inject arbitrary
JavaScript.
CVE-2016-4513 [b] has been assigned to this vulnerability. A CVSS v3 base score
of 6.1 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N). [c]
VULNERABILITY DETAILS
EXPLOITABILITY
This vulnerability could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target this vulnerability.
DIFFICULTY
An attacker with a low skill would be able to exploit this vulnerability.
MITIGATION
Schneider Electric has produced a firmware update to mitigate this
vulnerability. The PowerLogic PM8ECC firmware Version 2.651 is available at:
http://www.schneider-electric.com/ww/en/download/document/p8e02651_DOT_bin
(link is external)
ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of this vulnerability. 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 at:
http://ics-cert.us-cert.gov/content/recommended-practices. 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 ICSCERT 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
(http://ics-cert.us-cert.gov/).
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.
a. CWE-79: Improper Neutralization of Input During Web Page Generation
('Cross-site Scripting'), http://cwe.mitre.org/data/definitions/79.html, web
site last accessed June 21, 2016.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4513, NIST
uses this advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
c. CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S...,
web site last accessed June 21, 2016.
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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