CVE-2021-34328 : Security Advisory and Response

A vulnerability has been identified in JT2Go, Solid Edge SE2021, and Teamcenter Visualization. The affected applications lack proper validation of user-supplied data, potentially allowing for an out-of-bounds write past the fixed-length heap-based buffer.

Understanding CVE-2021-34328

This CVE describes a heap-based buffer overflow vulnerability affecting Siemens products JT2Go, Solid Edge SE2021, and Teamcenter Visualization.

What is CVE-2021-34328?

The vulnerability in the plmxmlAdapterSE70.dll library of the affected applications could be exploited by an attacker to execute arbitrary code within the current process.

The Impact of CVE-2021-34328

An attacker exploiting this vulnerability could potentially gain unauthorized access, execute malicious actions, or cause a denial of service.

Technical Details of CVE-2021-34328

The following technical information provides insight into the vulnerability.

Vulnerability Description

The vulnerability arises due to insufficient validation of user-supplied data when parsing PAR files, leading to an out-of-bounds write on a heap-based buffer.

Affected Systems and Versions

JT2Go: All versions less than V13.2
Solid Edge SE2021: All versions less than SE2021MP5
Teamcenter Visualization: All versions less than V13.2

Exploitation Mechanism

Exploitation involves leveraging the lack of proper validation in the plmxmlAdapterSE70.dll library to overwrite memory and execute arbitrary code.

Mitigation and Prevention

To address CVE-2021-34328, immediate action and long-term security practices are recommended.

Immediate Steps to Take

Apply security patches provided by Siemens promptly.
Monitor security advisories from the vendor for updates and recommendations.

Long-Term Security Practices

Regularly update software and applications to the latest secure versions.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Ensure that all affected systems are updated with the latest patches to mitigate the risk of exploitation and secure software integrity.