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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-21-007-01) Hitachi ABB Power Grids FOX615
8 January 2021
AusCERT Security Bulletin Summary
Product: Hitachi ABB Power Grids FOX615 Multiservice-Multiplexer
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2018-10933
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ICS Advisory (ICSA-21-007-01)
Hitachi ABB Power Grids FOX615 Multiservice-Multiplexer
Original release date: January 07, 2021
All information products included in https://us-cert.cisa.gov/ics 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 https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 9.1
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Hitachi ABB Power Grids
o Equipment: FOX615 Multiservice-Multiplexer
o Vulnerability: Improper Authentication
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker remote
access to the device without authentication.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Hitachi ABB Power Grids reports a vulnerability exists in the libssh library
included in the following products:
o FOX61x R1 using CESM1/CESM2: All versions prior to cesne_r1h07_12.esw
o FOX61x R2 using CESM1/CESM2: All versions prior to cesne_r2d14_03.esw
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER AUTHENTICATION CWE-287
An attacker can send a specially crafted message to the device causing it to
open a communication channel without first performing authentication, which may
allow an attacker to execute arbitrary commands.
CVE-2018-10933 has been assigned to this vulnerability. A CVSS v3 base score of
9.1 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Switzerland
Hitachi ABB Power Grids reported this vulnerability to CISA.
Hitachi ABB Power Grids recommends users apply the following firmware:
o FOX61x R1: CESM1/CESM2: Update to Version cesne_r1h07_12.esw or newer
o FOX61x R2: CESM1/CESM2: Update to Version cesne_r2d14_03.esw or newer
For additional information and support please contact a product provider or
Hitachi ABB Power Grids service organization .
Hitachi ABB Power Grids recommends security practices and firewall
configurations to help protect a process control network from attacks
originating from outside the network. Such practices require process control
systems be physically protected from direct access by unauthorized personnel,
have no direct connections to the Internet, and are separated from other
networks by a firewall system that has a minimal number of ports exposed. Other
systems must be evaluated on case-by-case basis. Process control systems should
not be used for Internet browsing, instant messaging, or receiving e-mails.
Portable computers and removable storage media should be carefully scanned for
viruses before they are connected to a control system.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
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.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.cisa.gov . 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
on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
CISA 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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