CVE-2021-34939 : Exploit Details and Defense Strategies

This CVE-2021-34939 article provides detailed information about a vulnerability affecting Bentley View 10.15.0.75, allowing remote attackers to execute arbitrary code. User interaction is required for exploitation through visiting a malicious page or opening a malicious file.

Understanding CVE-2021-34939

This section delves into the specifics of the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-34939?

CVE-2021-34939 is a vulnerability in Bentley View 10.15.0.75 that enables remote attackers to execute arbitrary code by exploiting a flaw in parsing JT files. This flaw occurs due to inadequate validation of objects, allowing code execution in the current process context.

The Impact of CVE-2021-34939

The vulnerability has a CVSS base score of 7.8 (High severity) with high impacts on confidentiality, integrity, and availability. Attackers can execute code on vulnerable systems without the need for any privileges.

Technical Details of CVE-2021-34939

This section outlines the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the lack of object validation in JT file parsing, enabling attackers to execute code within the current process.

Affected Systems and Versions

Bentley View 10.15.0.75 is the specific version impacted by this vulnerability.

Exploitation Mechanism

To exploit this vulnerability, attackers need victims to visit a malicious page or open a malicious file.

Mitigation and Prevention

Explore the necessary steps to take immediately post-discovery and establish long-term security practices to prevent such vulnerabilities.

Immediate Steps to Take

Users should update to a patched version or apply recommended security measures to mitigate the risk of exploitation.

Long-Term Security Practices

Implement robust security practices, regularly update systems, and educate users to recognize and avoid potential threats.

Patching and Updates

Stay informed about security patches and updates for Bentley View to address known vulnerabilities.