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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-21-077-02) Hitachi ABB Power Grids eSOMS
19 March 2021
AusCERT Security Bulletin Summary
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
CVE Names: CVE-2021-26845
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ICS Advisory (ICSA-21-077-02)
Hitachi ABB Power Grids eSOMS
Original release date: March 18, 2021
All information products included in https://us-cert.cisa.gov/ics are provided
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1. EXECUTIVE SUMMARY
o CVSS v3 7.5
o ATTENTION: Low skill level to exploit
o Vendor: Hitachi ABB Power Grids
o Equipment: eSOMS
o Vulnerability: Exposure of Sensitive Information to an Unauthorized Actor
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to gain
access to unauthorized information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Hitachi ABB Power Grids reports this vulnerability affects the following eSOMS
o eSOMS Version 6.0 prior to 184.108.40.206.2
o eSOMS Version 6.1 prior to 6.1.4
o eSOMS versions prior to 6.3
3.2 VULNERABILITY OVERVIEW
3.2.1 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
A vulnerability exists in the eSOMS reporting function that could allow an
unauthorized user to gain access to report data if the URL used to access the
report is discovered.
CVE-2021-26845 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/
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 has published an advisory for eSOMS and recommends
users to update affected products as soon as possible. The following
mitigations were developed to address the vulnerability:
o eSOMS version 220.127.116.11.2
o eSOMS version 6.1.4
o eSOMS version 6.3
For additional information and support, contact a product provider or Hitachi
ABB Power Grids service organization. For contact information, see Hitachi ABB
Power Grids contact-centers .
Recommended security practices and firewall configurations can help protect an
organization network from attacks that originate from outside the network. Such
practices include ensuring critical systems are physically protected from
direct access by unauthorized personnel, have no direct connections to the
Internet, and are separated from other networks by means of a firewall that has
a minimal number of ports exposed, and others that must be evaluated case by
case. Critical systems should not be used for Internet surfing, 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
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. CISA reminds organizations to perform
proper impact analysis and risk assessment prior to deploying defensive
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. This
vulnerability is not exploitable remotely.
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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