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AUSCERT External Security Bulletin Redistribution
ESB-2021.2910
Advisory (icsa-21-238-03) Delta Electronics DIAEnergie
27 August 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics DIAEnergie
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Cross-site Request Forgery -- Remote with User Interaction
Unauthorised Access -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38393 CVE-2021-38391 CVE-2021-38390
CVE-2021-33003 CVE-2021-32991 CVE-2021-32983
CVE-2021-32967 CVE-2021-32955
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-238-03
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ICS Advisory (ICSA-21-238-03)
Delta Electronics DIAEnergie
Original release date: August 26, 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 9.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Delta Electronics
o Equipment: DIAEnergie
o Vulnerabilities: Use of Password Hash with Insufficient Computational
Effort, Authentication Bypass Using an Alternate Path or Channel,
Unrestricted Upload of File with Dangerous Type, SQL Injection, Cross-site
Request Forgery
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
retrieve passwords in cleartext, remotely execute code, cause a user to carry
out an action unintentionally, or log in and use the device with administrative
privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of DIAEnergie are affected:
o DIAEnergie Version 1.7.5 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF PASSWORD HASH WITH INSUFFICIENT COMPUTATIONAL EFFORT CWE-916
The affected product may allow an attacker to retrieve passwords in cleartext
due to a weak hashing algorithm.
CVE-2021-33003 has been assigned to this vulnerability. A CVSS v3 base score of
5.5 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/
C:H/I:N/A:N ).
3.2.2 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL CWE-288
The affected product may allow an attacker to add a new administrative user
without being authenticated or authorized, which may allow the attacker to log
in and use the device with administrative privileges.
CVE-2021-32967 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.3 UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434
The affected product allows unrestricted file uploads, which may allow an
attacker to remotely execute code.
CVE-2021-32955 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.4 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
A Blind SQL injection vulnerability exists in the /DataHandler/Handler_CFG.ashx
endpoint. The application does not properly validate the user-controlled value
supplied through the parameter keyword before using it as part of an SQL query.
A remote, unauthenticated attacker can exploit this issue to execute arbitrary
code in the context of NT SERVICE\MSSQLSERVER.
CVE-2021-32983 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.5 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
A Blind SQL injection vulnerability exists in the /DataHandler/
HandlerEnergyType.ashx endpoint. The application does not properly validate the
user-controlled value supplied through the parameter egyid before using it as
part of an SQL query. A remote, unauthenticated attacker can exploit this issue
to execute arbitrary code in the context of NT SERVICE\MSSQLSERVER.
CVE-2021-38390 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.6 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
A Blind SQL injection vulnerability exists in the /DataHandler/AM/
AM_Handler.ashx endpoint. The application does not properly validate the
user-controlled value supplied through the parameter type before using it as
part of an SQL query. A remote, unauthenticated attacker can exploit this issue
to execute arbitrary code in the context of NT SERVICE\MSSQLSERVER.
CVE-2021-38391 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A: H).
3.2.7 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
A Blind SQL injection vulnerability exists in the /DataHandler/
HandlerAlarmGroup.ashx endpoint. The application does not properly validate the
user-controlled value supplied through the parameter agid before using it as
part of an SQL query. A remote, unauthenticated attacker can exploit this issue
to execute arbitrary code in the context of NT SERVICE\MSSQLSERVER.
CVE-2021-38393 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.8 CROSS-SITE REQUEST FORGERY (CSRF) CWE-352
The affected product is vulnerable to cross-site request forgery, which may
allow an attacker to cause a user to carry out an action unintentionally.
CVE-2021-32991 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:N/I:L/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Michael Heinzl reported these vulnerabilities to CISA.
4. MITIGATIONS
Delta Electronics is working on a patch and recommends users install this
update on all affected systems upon release on September 15, 2021.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. 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.
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
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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