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AUSCERT External Security Bulletin Redistribution
ESB-2016.2609
Schneider Electric IONXXXX Series Power Meter Vulnerabilities
4 November 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electric IONXXXX Series Power Meter
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Modify Arbitrary Files -- Existing Account
Cross-site Request Forgery -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2016-5815 CVE-2016-5809
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-16-308-03
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This advisory is a follow-up to the alert titled ICS-ALERT-16-256-02 Schneider
Electric ION Power Meter CSRF Vulnerability that was published September 12,
2016, on the NCCIC/ICS-CERT web site. This advisory contains mitigation
details for a cross-site request forgery and no access control vulnerabilities
in Schneider Electrics IONXXXX series power meters. Advisory (ICSA-16-308-03)
Schneider Electric IONXXXX Series Power Meter Vulnerabilities
Original release date: November 03, 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
This advisory is a follow-up to the alert titled ICS-ALERT-16-256-02 Schneider
Electric ION Power Meter CSRF Vulnerability that was published September 12,
2016, on the NCCIC/ICS-CERT web site.
Independent researcher Karn Ganeshen has identified a cross-site request
forgery (CSRF) and no access control vulnerabilities in Schneider Electric's
IONXXXX series power meters. Schneider Electric has produced instructions to
mitigate these vulnerabilities.
These vulnerabilities could be exploited remotely.
AFFECTED PRODUCTS
The following IONXXXX series power meter versions are affected:
ION73XX series,
ION75XX series,
ION76XX series,
ION8650 series,
ION8800 series, and
PM5XXX series.
IMPACT
An unauthorized user can access the device management portal and make
configuration changes.
Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the
impact of these vulnerabilities based on their operational environment,
architecture, and product implementation.
BACKGROUND
Schneider Electric's corporate headquarters is located in Paris, France, and
maintains offices in more than 100 countries worldwide.
The affected products, IONXXXX series power meters, provide power and energy
monitoring. According to Schneider Electric, these products are deployed
across several sectors including Critical Manufacturing, Energy, Water and
Wastewater Systems, and others. Schneider Electric estimates that these
products are used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
CROSS-SITE REQUEST FORGERY [a]
There is no CSRF Token generated to authenticate the user during a session.
Successful exploitation of this vulnerability can allow unauthorized
configuration changes to be made and saved.
CVE-2016-5809 [b] has been assigned to this vulnerability. A CVSS v3 base
score of 8.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:HA:H). [c]
IMPROPER ACCESS CONTROL [d]
No authentication is configured by default. An unauthorized user can access
the device management portal and make configuration changes.
CVE-2016-5815 [e] has been assigned to this vulnerability. A CVSS v3 base
score of 8.1 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:HA:N). [f]
VULNERABILITY DETAILS
EXPLOITABILITY
These vulnerabilities could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target these vulnerabilities.
DIFFICULTY
An attacker with a low skill would be able to exploit these vulnerabilities.
MITIGATION
Schneider Electric's security notice SEVD-2016-256-02, is available at the
following location:
http://www2.schneider-electric.com/sites/corporate/en/support/cybersecurity/cybersecurity.page
(link is external),
Schneider Electric recommends the following mitigations:
Change configuration parameter by setting the "Webserver Config Access"
register to "Disabled." This register determines whether the user can
configure the meter through a browser. Valid entries are Enable or Disable.
This register is set to Enable by default.
Change the "Enable Webserver" register. This register enables or disables the
webserver entirely. Values for this register are YES and NO. The web server is
enabled by default (the value is set to YES). Some power meters may be revenue
locked, which further protects unauthorized meter configuration parameter
changes except Owner, Tag1, and Tag2 string registers.
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.
a. CWE-352: Cross-Site Request Forgery (CSRF),
https://cwe.mitre.org/data/definitions/352.html, web site last accessed
November 3, 2016.
b. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5809, 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:L/UI:N/S...,
web site last accessed November 3, 2016.
d. CWE-284: Improper Access Control,
https://cwe.mitre.org/data/definitions/284.html, web site last accessed
November 3, 2016.
e. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5815, NIST
uses this advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
f. CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S...,
web site last accessed November 3, 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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