CVE-2021-34878 : Security Advisory and Response

This CVE-2021-34878 affects Bentley View version 10.15.0.75, allowing remote attackers to execute arbitrary code. The vulnerability arises due to a flaw in parsing JT files, enabling attackers to trigger a buffer overflow.

Understanding CVE-2021-34878

CVE-2021-34878 involves a critical vulnerability in Bentley View 10.15.0.75, which could lead to remote code execution by exploiting flaws in JT file parsing.

What is CVE-2021-34878?

CVE-2021-34878 permits remote attackers to execute arbitrary code on affected Bentley View installations. It requires user interaction, like visiting a malicious page or opening a malicious file, to trigger a buffer overflow in parsing JT files.

The Impact of CVE-2021-34878

The vulnerability poses a high risk, with a CVSS base score of 7.8 out of 10, indicating high confidentiality, integrity, and availability impacts. As such, immediate action is crucial to prevent potential exploitation.

Technical Details of CVE-2021-34878

The vulnerability involves an out-of-bounds write flaw within the parsing of JT files in Bentley View 10.15.0.75. Remote attackers can leverage this flaw to execute code in the context of the current process.

Vulnerability Description

The flaw allows attackers to craft JT files triggering a buffer overflow, leading to the execution of arbitrary code on the vulnerable system.

Affected Systems and Versions

Bentley View version 10.15.0.75 is affected by this vulnerability, exposing installations to potential remote code execution attacks.

Exploitation Mechanism

Attackers can exploit this vulnerability by luring a target to visit a malicious page containing a crafted JT file or opening a malicious JT file.

Mitigation and Prevention

To safeguard against CVE-2021-34878, immediate steps should be taken to address this critical issue and prevent potential exploitation.

Immediate Steps to Take

Users should apply security patches provided by Bentley to mitigate the vulnerability. It is essential to avoid interacting with untrusted JT files to prevent exploitation.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation and restricting file permissions, can enhance protection against similar vulnerabilities.

Patching and Updates

Regularly updating Bentley View to the latest secure versions and staying informed about security advisories is crucial to prevent exploitation of known vulnerabilities.