ICS Advisory (ICSA-21-238-03)

Delta Electronics DIAEnergie

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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

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:

  • 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

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • 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:

  • Minimize network exposure for all control system devices and/or systems, and ensure that 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 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:

No known public exploits specifically target these vulnerabilities.
 


Contact Information

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

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