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AUSCERT External Security Bulletin Redistribution
ESB-2016.1401
GE MultiLink Series Hard-coded Credential Vulnerability
3 June 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: GE MultiLink Series
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-2310
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-16-154-01
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Advisory (ICSA-16-154-01)
GE MultiLink Series Hard-coded Credential Vulnerability
Original release date: June 02, 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
GE has identified a hard-coded credential vulnerability in GEs MultiLink
series managed switches. GE has produced new firmware versions to mitigate
this vulnerability.
This vulnerability could be exploited remotely.
AFFECTED PRODUCTS
The following MultiLink products are affected:
GE ML800 Switch, firmware versions prior to Version 5.5.0,
GE ML810 Switch, firmware versions prior to Version 5.5.0k,
GE ML1200 Switch, firmware versions prior to Version 5.5.0,
GE ML1600 Switch, firmware versions prior to Version 5.5.0,
GE ML2400 Switch, firmware versions prior to Version 5.5.0,
GE ML3000 Switch, firmware versions prior to Version 5.5.0k, and
GE ML3100 Switch, firmware versions prior to Version 5.5.0k.
IMPACT
Exploitation of this vulnerability may allow an attacker to gain unauthorized
administrative access to device configurations resulting in exposure and
control of all configuration options available through the web interface.
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
GE is a US-based company that maintains offices in several countries around
the world.
The affected products, Multilink series switches, are managed Ethernet
switches designed specifically for use in industrial facilities, substations,
and transportation environments. According to GE, the Multilink series
switches are deployed across several sectors including Critical Manufacturing,
Energy, and Water and Wastewater Systems. GE estimates that these products are
used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
USE OF HARD-CODED PASSWORD [a]
The Multilink series switches have a hard-coded credential vulnerability,
which could allow unauthorized administrative access to device configuration
options available through the web interface.
CVE-2016-2310 [b] has been assigned to this vulnerability. A CVSS v3 base score
of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). [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
GE has released new firmware versions for the MultiLink series managed
switches that resolve the identified vulnerability. GE recommends that asset
owners install firmware upgrades on affected devices. Firmware Version 5.5.0
resolves the vulnerability for the ML800, ML1200, ML1600, and ML2400. Firmware
Version 5.5.0k resolves the vulnerability for the ML810, ML3000, and ML3100.
The new firmware version for the ML800 switch, Version 5.5.0, is available at
the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml800&type=7 (link is
external)
The new firmware version for the ML810 switch, Version 5.5.0k, is available at
the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml810&type=7 (link is
external)
The new firmware version for the ML1200 switch, Version 5.5.0, is available at
the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml1200&type=7 (link is
external)
The new firmware version for the ML1600 switch, Version 5.5.0, is available at
the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml1600&type=7 (link is
external)
The new firmware version for the ML2400 switch, Version 5.5.0, is available at
the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml2400&type=7 (link is
external)
The new firmware version for the ML3000 and ML3100 switches, Version 5.5.0k,
is available at the following location:
https://www.gegridsolutions.com/app/Resources.aspx?prod=ml3000&type=7 (link is
external)
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-259: Use of Hard-coded Password,
http://cwe.mitre.org/data/definitions/259.html, web site last accessed June
02, 2016.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2310, 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 June 02, 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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