CVE-2021-34876 Explained : Impact and Mitigation

A vulnerability in Bentley View 10.15.0.75 allows remote attackers to execute arbitrary code, posing a significant security risk. This article provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-34876.

Understanding CVE-2021-34876

This section delves into the specifics of the vulnerability affecting Bentley View 10.15.0.75.

What is CVE-2021-34876?

CVE-2021-34876 enables remote attackers to execute arbitrary code on vulnerable installations of Bentley View 10.15.0.75. Exploitation requires user interaction by accessing a malicious page or file. The vulnerability lies in JT file parsing, allowing attackers to overwrite allocated buffers, leading to code execution.

The Impact of CVE-2021-34876

The vulnerability has a CVSS base score of 7.8, categorizing it as high severity. It presents a low attack complexity but requires local access. Successful exploitation can result in severe impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-34876

This section provides a detailed overview of the technical aspects of CVE-2021-34876.

Vulnerability Description

CVE-2021-34876 is categorized as an 'Out-of-bounds Write' vulnerability (CWE-787), allowing attackers to trigger buffer overflows by manipulating JT files.

Affected Systems and Versions

The vulnerability affects Bentley View version 10.15.0.75, exposing installations running this specific version to exploitation.

Exploitation Mechanism

Attackers can exploit CVE-2021-34876 by crafting malicious JT files that trigger buffer write operations beyond their allocated size, leading to arbitrary code execution.

Mitigation and Prevention

This section outlines strategies to mitigate the risks associated with CVE-2021-34876.

Immediate Steps to Take

Users are advised to refrain from accessing untrusted websites or opening suspicious files to prevent exploitation. Implementing proper security measures can help reduce the likelihood of successful attacks.

Long-Term Security Practices

Regular security training, maintaining up-to-date software, and adopting secure coding practices can enhance overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

Vendor patches and security updates should be applied promptly to address CVE-2021-34876, ensuring that systems are protected against known vulnerabilities.