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AUSCERT External Security Bulletin Redistribution
ESB-2021.1357
Advisory (icsa-21-110-01) Hitachi ABB Power Grids Ellipse APM
21 April 2021
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AusCERT Security Bulletin Summary
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Product: Hitachi ABB Power Grids Ellipse APM
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27887
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-110-01
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ICS Advisory (ICSA-21-110-01)
Hitachi ABB Power Grids Ellipse APM
Original release date: April 20, 2021
Legal Notice
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 6.3
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Hitachi ABB Power Grids
o Equipment: Ellipse APM
o Vulnerability: Cross-site Scripting
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an authenticated user
or integrated application to inject malicious data into the application that
can then be executed in a victim's browser.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Hitachi ABB Power Grids reports the vulnerability affects the following Ellipse
APM products:
o Ellipse APM Versions 5.3.0.1 and earlier
o Ellipse APM Versions 5.2.0.3 and earlier
o Ellipse APM Versions 5.1.0.6 and earlier
3.2 VULNERABILITY OVERVIEW
3.2.1 CROSS-SITE SCRIPTING CWE-79
A stored XSS vulnerability in the main dashboard of Ellipse APM versions prior
to 5.3.0.1, 5.2.0.3, and 5.1.0.6 allows an authenticated user or integrated
application to inject malicious data into the application that can then be
executed in a victim's browser.
CVE-2021-27887 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:R/S:U/
C:H/I:L/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Switzerland
3.4 RESEARCHER
Hitachi ABB Power Grids reported this vulnerability to CISA.
4. MITIGATIONS
Hitachi ABB Power Grids recommends users apply Ellipse APM Versions 5.3.0.2,
5.2.0.4, and 5.1.0.7 at the earliest convenience. Please see the advisory on
the Hitachi ABB Power Grids website for more information.
Hitachi ABB Power Grids recommends the following general cybersecurity hygiene
to reduce the risk of exploitation:
o Ensure the "Administrator" application role is only granted to fully
trusted APM users who are trained not to import harmful data to APM (e.g.,
containing HTML or JavaScript).
o Limit all "Import" role API credentials and integrations to only those
providing safe data. Introduce filters in the source applications to ensure
data safety.
o Introduce a Web Application Firewall solution in front of the APM web
interfaces with a capability of blocking XSS attack payloads in HTTP(S)
requests, both plain REST (JSON/XML) as well as Excel files wrapped in REST
(JSON).
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
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
Strategies .
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:
Email: CISAservicedesk@cisa.dhs.gov
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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