Siemens JT2Go and Teamcenter Visualization (Update A)
1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: Low attack complexity
- Vendor: Siemens
- Equipment: JT2Go & Teamcenter Visualization
- Vulnerabilities: Improper Check for Unusual or Exceptional Conditions, Out-of-bounds Write, Out-of-bounds Read
2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled ICSA-21-222-03 Siemens JT2Go and Teamcenter Visualization that was published August 10, 2021, to the ICS webpage on us-cert.cisa.gov.
3. RISK EVALUATION
Successful exploitation of these vulnerabilities could result in an application crash or arbitrary code execution.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following Siemens products are affected:
- JT2Go: All versions prior to v126.96.36.199
- Teamcenter Visualization: All versions prior to v188.8.131.52
4.2 VULNERABILITY OVERVIEW
An improper check for unusual or exceptional conditions exists with the parsing DGN files from Open Design Alliance Drawings SDK, Version 2022.4 and prior, resulting from the lack of proper validation of the user-supplied data. This may result out-of-bounds conditions, allowing attackers to cause a denial-of-service condition or execute code in the context of the current process.
An out-of-bounds write issue exists in the DGN file-reading procedure in the Drawings SDK, Version 2022.4 and prior, resulting from the lack of proper validation of user-supplied data. This can result in a write past the end of an allocated buffer and allow attackers to cause a denial-of-service condition or execute code in the context of the current process.
The plmxmlAdapterSE70.DLL library in affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out-of-bounds read past the end of an allocated buffer. An attacker could leverage this vulnerability to leak information in the context of the current process.
- CRITICAL INFRASTRUCTURE SECTORS: Multiple
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Germany
Open Design Alliance, and Mat Powell of Trend Micro’s Zero Day Initiative reported these vulnerabilities to CISA.
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Siemens has released updates for the following products:
- JT2Go: Update to v184.108.40.206 or later version
- Teamcenter Visualization: Update to v220.127.116.11 or later version (login required)
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Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
- Avoid opening untrusted files from unknown sources in JT2Go and Teamcenter Visualization.
As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens operational guidelines for industrial security and follow the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity
For more information about this issue, please see Siemens Security Advisory SSA-938030
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.
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 these vulnerabilities. These vulnerabilities are not exploitable remotely.