Siemens Solid Edge, JT2Go, and Teamcenter Visualization

1. EXECUTIVE SUMMARY

• CVSS v3 7.8 ***ATTENTION: **Low attack complexity
• **Vendor:**Siemens
• **Equipment:**Solid Edge, JT2Go, and Teamcenter Visualization
• **Vulnerabilities:**Improper Restriction of Operations within the Bounds of a Memory Buffer, Out-of-bounds Write, Heap-based Buffer Overflow, Out-of-bounds Read

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could lead the application to crash or potentially lead to arbitrary code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports these vulnerabilities affect the following visualization software products:

• JT2Go: All versions
• Solid Edge SE2021: All versions prior to SE2021MP9
• Solid Edge SE2022: All versions prior to SE2022MP1
• Teamcenter Visualization v12.4: All versions
• Teamcenter Visualization v13.1: All versions
• Teamcenter Visualization v13.1: All versions prior to v13.1.0.8
• Teamcenter Visualization v13.2: All versions
• Teamcenter Visualization v13.3: All versions
• Teamcenter Visualization v13.3: All versions prior to v13.3.0.1

Not all the above products are affected by all the vulnerabilities below. For a complete list of how they correspond, please see Siemens security advisory SSA-301589

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119

The Datalogics APDFL library used in affected products is vulnerable to memory corruption condition while parsing specially crafted PDF files. An attacker could leverage this vulnerability to execute code in the context of the current process.

CVE-2021-38405 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.2.2 OUT-OF-BOUNDS WRITE CWE-787

Open Design Alliance Drawings SDK before 2022.11 used in affected products contains an out-of-bounds write vulnerability when parsing a DXF file. An attacker can leverage this vulnerability to execute code in the context of the current process.

CVE-2021-43336 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.2.3 HEAP-BASED BUFFER OVERFLOW CWE-122

The plmxmlAdapterSE70.dll contains an out-of-bounds write past the fixed-length heap-based buffer while parsing specially crafted PAR files. This could allow an attacker to execute code in the context of the current process.

CVE-2021-44000 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.2.4 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119

The plmxmlAdapterSE70.dll library is vulnerable to memory corruption condition while parsing specially crafted PAR files. An attacker could leverage this vulnerability to execute code in the context of the current process.

CVE-2021-44016 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.2.5 OUT-OF-BOUNDS READ CWE-125

The plmxmlAdapterSE70.dll library is vulnerable to memory corruption condition while parsing specially crafted PAR files. An attacker could leverage this vulnerability to execute code in the context of the current process.

CVE-2021-44018 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

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

3.4 RESEARCHER

Mat Powell of Trend Micro’s Zero Day Initiative reported these vulnerabilities to Siemens and CISA.

4. MITIGATIONS

Siemens has released updates for some of the affected products and recommends updating to the latest versions. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not yet available.

• Solid Edge SE2021: Update to SE2021MP9 or later version
• Solid Edge SE2022: Update to SE2022MP1 or later version
• Teamcenter Visualization v13.1: Update to v13.1.0.8 or later version
• Teamcenter Visualization v13.3: Update to v13.3.0.1 or later version

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

• Avoid opening untrusted files from unknown sources in affected products.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security, and to follow the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Please see Siemens security advisory SSA-301589 for more information.

CISA recommends users take defensive measures to minimize the risk of exploitation o these vulnerabilities. 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.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on 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:

• 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. These vulnerabilities are not exploitable remotely.

Contact Information

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

Email: [email protected]
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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