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AUSCERT External Security Bulletin Redistribution
ESB-2018.0478
Advisory (ICSA-18-046-02) GE D60 Line Distance Relay
16 February 2018
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AusCERT Security Bulletin Summary
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Product: GE D60 Line Distance Relay
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5475 CVE-2018-5473
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-046-02
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Advisory (ICSA-18-046-02)
GE D60 Line Distance Relay
Original release date: February 15, 2018
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/.
CVSS v3 9.8
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: GE
Equipment: D60 Line Distance Relay
Vulnerabilities: Stack-based Buffer Overflow, Improper Restriction of
Operations within the Bounds of a Memory Buffer
AFFECTED PRODUCTS
The following versions of the D60 Line Distance Relay are affected:
o D60 devices running firmware Version 7.11 and prior.
IMPACT
Successful exploitation of these vulnerabilities could allow a remote attacker
to execute arbitrary code on the device.
MITIGATION
GE has released firmware that addresses the vulnerabilities. The latest
firmware can be obtained from:
https://www.gegridsolutions.com/app/ViewFiles.aspx?prod=d60&type=7
Authentication will be required to download the firmware.
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet.
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC 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 NCCIC Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber
Intrusion Detection and Mitigation Strategies, that is available for download
from the ICS-CERT website.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
VULNERABILITY OVERVIEW
STACK-BASED BUFFER OVERFLOW CWE-121
Multiple stack-based buffer overflow vulnerabilities have been identified,
which may allow remote code execution.
CVE-2018-5475 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:H).
IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119
The SSH functions of the device are vulnerable to buffer overflow conditions
that may allow a remote attacker to execute arbitrary code on the device.
CVE-2018-5473 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:H).
RESEARCHER
Kirill Nesterov of Kaspersky Labs discovered these vulnerabilities, and GE and
Kasperksy Labs reported and coordinated the vulnerabilities with NCCIC.
BACKGROUND
Critical Infrastructure Sectors: Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: USA
Contact Information
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: http://
ics-cert.us-cert.gov
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
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