CVE-2021-34940 : What You Need to Know

This CVE-2021-34940 article provides insights into a critical vulnerability affecting Bentley View version 10.15.0.75. The vulnerability allows remote attackers to execute arbitrary code, posing a significant risk to the security of affected systems.

Understanding CVE-2021-34940

This section delves into the details of CVE-2021-34940, highlighting its impact, technical aspects, and mitigation strategies.

What is CVE-2021-34940?

CVE-2021-34940 is a vulnerability in Bentley View 10.15.0.75 that enables remote attackers to execute arbitrary code by exploiting a flaw in the parsing of JT files. Attackers can trigger buffer overflow by crafting malicious data in a JT file, leading to code execution.

The Impact of CVE-2021-34940

The impact of CVE-2021-34940 is severe, with a CVSS base score of 7.8 (High). This vulnerability requires user interaction, where a target must visit a malicious page or open a corrupted file, allowing attackers to execute code in the context of the current process.

Technical Details of CVE-2021-34940

This section outlines specific technical details related to the vulnerability, including its description, affected systems, and the exploitation mechanism.

Vulnerability Description

CVE-2021-34940 involves an out-of-bounds write vulnerability (CWE-787) that arises from improper handling of crafted data in JT files, leading to a buffer overflow and arbitrary code execution.

Affected Systems and Versions

The vulnerability impacts Bentley View version 10.15.0.75, exposing installations of this software to exploitation by remote attackers.

Exploitation Mechanism

To exploit CVE-2021-34940, attackers must trick a user into accessing a malicious page or opening a corrupted file containing specially crafted data that triggers the buffer overflow, enabling code execution.

Mitigation and Prevention

In this section, effective ways to mitigate the risks associated with CVE-2021-34940 are discussed, including immediate steps and long-term security practices.

Immediate Steps to Take

Users are advised to update Bentley View to a patched version to address CVE-2021-34940. Additionally, exercise caution while browsing and opening files from untrusted sources.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation, regular security updates, and educating users on phishing threats, can help prevent similar vulnerabilities.

Patching and Updates

Vendors should release security patches promptly to mitigate the risk posed by CVE-2021-34940 and ensure system integrity.