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AUSCERT External Security Bulletin Redistribution
ESB-2016.1731
Tollgrade Smart Grid EMS LightHouse Vulnerabilities
14 July 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Tollgrade Smart Grid EMS LightHouse Sensor Management System
Publisher: ICS-CERT
Operating System: VMware ESX Server
SUSE
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-5807 CVE-2016-5797 CVE-2016-5790
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-16-194-01
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Advisory (ICSA-16-194-01)
Tollgrade Smart Grid EMS LightHouse Vulnerabilities
Original release date: July 12, 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
Ashish Kamble of Qualys, Inc. has identified vulnerabilities in Tollgrade
Communications, Inc.s Smart Grid LightHouse Sensor Management System (SMS)
Software EMS. Tollgrade has produced a new version to mitigate these
vulnerabilities. Ashish Kamble has tested the new version to validate that it
resolves these vulnerabilities.
These vulnerabilities could be exploited remotely.
AFFECTED PRODUCTS
Tollgrade Communications, Inc. reports that the vulnerabilities affect the
following versions of LightHouse SMS Software:
LightHouse SMS, versions prior to Version 5.1, Patch 3
IMPACT
An attacker who exploits these vulnerabilities may be able to restart the
system, brute force a login, or change privileged parameters.
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
Tollgrade Communications, Inc. is a United States-based company that maintains
offices in the United Kingdom and Germany.
The affected product, LightHouse SMS Software, is a web-based distribution
monitoring system. According to Tollgrade Communications Inc., LightHouse SMS
Software is deployed across the Energy sector. Tollgrade estimates that this
product is used primarily in North America, Europe, and South America.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
MISSING AUTHENTICATION FOR CRITICAL FUNCTION [a]
An attacker can restart the LightHouse SMS Software without authentication.
CVE-2016-5790 [b] has been assigned to this vulnerability. A CVSS v3 base score
of 7.5 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). [c]
INFORMATION EXPOSURE THROUGH AN ERROR MESSAGE [d]
The content of error messages facilitates a brute force authentication attack.
CVE-2016-5797 [e] has been assigned to this vulnerability. A CVSS v3 base score
of 5.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). [f]
FORCED BROWSING [g]
A low privileged user can access and modify parameters that only an
administrator should be able to access.
CVE-2016-5807 [h] has been assigned to this vulnerability. A CVSS v3 base score
of 8.1 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). [i]
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
Tollgrade Communications Inc. released updated software, Version 5.1, Patch 3,
which resolves these vulnerabilities. Users should contact Tollgrade
Communications Inc. for support at the numbers below.
Tollgrade Communications, Inc.
Toll Free: 1 800-777-5405
Phone: 1 724-720-1480
Updated software may be found on its support site at:
http://customersupport.tollgrade.com (link is external)
ICS-CERT recommends that asset owners follow the vendors recommendations on
patching the impacted products. Internet accessible control system devices
should be isolated and located within protected areas of the asset owners
control system network to prevent exploitation from these vulnerabilities.
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 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-306: Missing Authentication for Critical Function,
http://cwe.mitre.org/data/definitions/306.html, web site last accessed July
12, 2016.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5790, 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:N/S...,
web site last accessed July 12, 2016.
d. CWE-209: Information Exposure Through an Error Message,
http://cwe.mitre.org/data/definitions/209.html, web site last accessed July
12, 2016.
e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5797, 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:N/UI:N/S...,
web site last accessed July 12, 2016.
g. CWE-425: Direct Request ('Forced Browsing'),
http://cwe.mitre.org/data/definitions/425.html, web site last accessed July
12, 2016.
h. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5807, NIST
uses this advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
i. 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 July 12, 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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