CVE-2021-27390 : What You Need to Know

A vulnerability has been identified in JT2Go and Teamcenter Visualization where the TIFF_loader.dll library lacks proper validation when parsing TIFF files, leading to an out-of-bounds write issue.

Understanding CVE-2021-27390

This CVE-2021-27390 affects Siemens' JT2Go and Teamcenter Visualization due to a lack of proper data validation.

What is CVE-2021-27390?

The vulnerability in JT2Go and Teamcenter Visualization allows an attacker to execute arbitrary code within the current process by exploiting the out-of-bounds write flaw in the TIFF_loader.dll library.

The Impact of CVE-2021-27390

An attacker can exploit this vulnerability to execute malicious code in the context of the affected application, potentially leading to a full system compromise.

Technical Details of CVE-2021-27390

The vulnerability is classified as CWE-787, which refers to an out-of-bounds write scenario.

Vulnerability Description

The flaw arises from the inadequate validation of user-supplied data in the TIFF_loader.dll library, allowing an attacker to write data beyond the allocated memory structure.

Affected Systems and Versions

All JT2Go and Teamcenter Visualization versions before V13.1.0.3 are impacted by this vulnerability.

Exploitation Mechanism

By sending a specially crafted TIFF file to the affected application, an attacker can trigger the out-of-bounds write condition and execute arbitrary code.

Mitigation and Prevention

It is crucial to take immediate action to secure systems against CVE-2021-27390.

Immediate Steps to Take

Update JT2Go and Teamcenter Visualization to version V13.1.0.3 or above to mitigate the vulnerability.

Long-Term Security Practices

Implement secure coding practices and conduct regular security assessments to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly apply security patches and updates provided by Siemens to protect against known vulnerabilities.