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AUSCERT External Security Bulletin Redistribution
ESB-2015.2439
Schneider Electric StruxureWare Building Expert Plaintext
Credentials Vulnerability
17 September 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electric StruxureWare Building Expert
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-3962
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-15-258-01
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Advisory (ICSA-15-258-01)
Schneider Electric StruxureWare Building Expert Plaintext Credentials
Vulnerability
Original release date: September 15, 2015
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
Independent researcher Artyom Kurbatov has identified a cleartext
transmission vulnerability in Schneider Electric's StruxureWare Building
Expert product. Schneider Electric has produced a new firmware version that
mitigates this vulnerability. Artyom Kurbatov has tested the new firmware
version to validate that it resolves the vulnerability.
This vulnerability could be exploited remotely.
AFFECTED PRODUCTS
Schneider Electric reports that the vulnerability affects the following
versions of StruxureWare Building Expert:
StruxureWare Building Expert, multi-purpose management device (MPM)
versions prior to 2.15.
IMPACT
If an attacker successfully exploits this vulnerability, he or she may
obtain user logon credentials.
Impact to individual organizations depends on many factors that are unique
to each organization. NCCIC/ICS-CERT recommends that organizations evaluate
the impact of this vulnerability based on their operational environment,
architecture, and product implementation.
BACKGROUND
Schneider Electric's corporate headquarters is located in Paris, France,
and it maintains offices in more than 100 countries worldwide.
The affected product, StruxureWare Building Expert, is a building automation
system for small and medium-sized buildings. According to Schneider Electric,
StruxureWare Building Expert is deployed in the Commercial Facilities
sector. Schneider Electric estimates that these products are used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION[a]
User logon credentials are not encrypted in transmission between server
and client machines.
CVE-2015-3962[b] has been assigned to this vulnerability. A CVSS
v2 base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C).[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 low skill would be able to exploit this vulnerability.
MITIGATION
Schneider Electric encourages all customers to upgrade their MPMs to the
newly released Version 2.15 or higher to mitigate the risks associated
with this vulnerability. It is important to plan the upgrade procedures
before execution to avoid unnecessary downtime and re-engineering. If
unsure about the risks associated with upgrading MPMs to the new firmware,
please contact your account manager or technical support.
For more information on this vulnerability and detailed instructions, please
see Schneider Electric's security notification number SEVD-2015-254-01 at
the following location:
www.schneider-electric.com/ww/en/download/document/SEVD-2015-254-01
Please see the MPM installation guide for more details about how to obtain
and install firmware Version 2.15. It can be found at the following location
(login required):
https://buildingsdownloads.schneider-electric.com/documents/10807/250220/MPM+Series+-+Installation+Sheet/6b83cb2c-6d93-4e41-9902-2d8e13936727
ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.
Whenever possible, configure devices to use encryption for communication,
which may include SSL or other secure protocols.
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 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. ICS-CERT reminds organizations to perform proper impact analysis
and risk assessment prior to deploying defensive measures.
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
(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-319: Cleartext Transmission of Sensitive Information,
http://cwe.mitre.org/data/definitions/319.html, web site last accessed
September 15, 2015.
b.
NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3962,
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,
http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C,
web site last accessed September 15, 2015.
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov
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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