1. EXECUTIVE SUMMARY
- CVSS v3 7.1
- ATTENTION: Low skill level to exploit
- Vendor: Mitsubishi Electric
- Equipment: Mitsubishi Electric FR Configurator2
- Vulnerabilities: Improper Restriction of XML External Entity Reference, Uncontrolled Resource Consumption
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may enable arbitrary files to be read or cause a denial-of-service condition.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Mitsubishi FR Configurator2, used for configuring Mitsubishi variable frequency drives, are affected:
- FR Configurator2 Version 1.16S and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611
This vulnerability is triggered when input passed to the XML parser is not sanitized while parsing the XML project and/or template file (.frc2). Once a user opens the file, the attacker could read arbitrary files.
CVE-2019-10976 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H).
3.2.2 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
This vulnerability can be triggered when an attacker provides the target with a rogue project file (.frc2). Once a user opens the rogue project, CPU exhaustion occurs, which causes the software to quit responding until the application is restarted.
CVE-2019-10972 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:N/UI:R/S:U/C:N/I:N/A:H).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Applied Risk reported these vulnerabilities to CISA.
4. MITIGATIONS
Mitsubishi Electric has released Version 1.17T for the reported vulnerabilities. Additional information about the vulnerabilities and how to obtain the update can be found at the following location:
Additional information about the vulnerabilities or Mitsubishi Electric’s compensating control is available by contacting a local Mitsubishi Electric representative, which can be found at the following location:
https://us.mitsubishielectric.com/fa/en/about-us/distributors
CISA recommends users take the following measures to protect themselves from social engineering attacks:
- Be careful with files from untrusted sources.
- 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.
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.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.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.
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 these vulnerabilities. These vulnerabilities are not exploitable remotely.
Source:
https://www.us-cert.gov/ics/advisories/icsa-19-204-01
Stay connected