Delta Electronics DIAEnergie (Update C)

1. EXECUTIVE SUMMARY

• CVSS v3 9.8
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Delta Electronics
• Equipment: DIAEnergie
• 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, Cross-site Scripting, Cleartext Transmission of Sensitive Information

2. UPDATE INFORMATION

This updated advisory is a follow-up to the advisory update titled ICSA-21-238-03 Delta Electronics DIAEnergie (Update B) that was published March 22, 2022, on the ICS webpage at www.cisa.gov/ics.

3. 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.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following versions of DIAEnergie are affected:

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• DIAEnergie: All versions prior to 1.9

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4.2 VULNERABILITY OVERVIEW

4.2.1    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).

4.2.2    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).

4.2.3    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).

4.2.4    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).

4.2.5    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).

4.2.6    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).

4.2.7    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).

4.2.8    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).

4.2.9    IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79

The affected product is vulnerable to a reflected cross-site scripting attack through error pages that are returned by “.NET Request.QueryString”. 

CVE-2021-23228 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/C:N/I:H/A:N).

4.2.10     IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79

The affected product is vulnerable to multiple cross-site scripting vulnerabilities when arbitrary code is injected into the parameter “name” of the script “HandlerEnergyType.ashx”. 

CVE-2021-44544 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/C:N/I:H/A:N).

4.2.11    IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79

The affected product is vulnerable to stored cross-site scripting when an unauthenticated user injects arbitrary code into the parameter “descr” of the script “DIAE_hierarchyHandler.ashx”.

CVE-2021-31558 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is  (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

4.2.12     IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79

The affected product is vulnerable to stored cross-site scripting when an unauthenticated user injects arbitrary code into the parameter “name” of the script “DIAE_HandlerAlarmGroup.ashx”.

CVE-2021-44471 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/C:N/I:H/A:N).

4.2.13    CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319

The affected product is vulnerable to cleartext transmission as the web application runs by default on HTTP. This could allow an attacker to remotely read transmitted information between the client and product.

CVE-2022-0988 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is  (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N).

4.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Taiwan

4.4 RESEARCHER

Michael Heinzl reported these vulnerabilities to CISA.

5. MITIGATIONS

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Delta Electronics has fixed the reported vulnerabilities and recommends users upgrade to version 1.9 or later.

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CISA recommends users take defensive measures to minimize the risk of exploitation of  these vulnerabilities. Specifically, users should:

• Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
• Locate control system networks and remote devices behind firewalls and isolate them from the business network.
• When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its 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 cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth 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:

• Do not click web links or open unsolicited attachments in email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploits specifically target these vulnerabilities.