CVE-2021-34893 : Security Advisory and Response

A critical vulnerability has been identified in Bentley View 10.15.0.75 that allows remote attackers to execute arbitrary code in the context of the current process. The vulnerability originates from the lack of proper validation of user-supplied data.

Understanding CVE-2021-34893

This section delves deeper into the impact and technical aspects of the CVE-2021-34893 vulnerability.

What is CVE-2021-34893?

CVE-2021-34893 is a heap-based buffer overflow vulnerability in Bentley View 10.15.0.75. It enables attackers to execute malicious code by exploiting the improper validation of user data during BMP file parsing.

The Impact of CVE-2021-34893

The vulnerability has a high severity score (7.8) with significant impacts on confidentiality, integrity, and availability. Attackers can exploit the flaw remotely with no privileges required, making it a critical security concern.

Technical Details of CVE-2021-34893

This section provides technical insights into the vulnerability, including affected systems, exploitation mechanisms, and mitigation strategies.

Vulnerability Description

The vulnerability emerges from insufficient validation of user-supplied data length, allowing attackers to overflow a heap-based buffer and execute arbitrary code within the affected process.

Affected Systems and Versions

Bentley View 10.15.0.75 is affected by this vulnerability, exposing systems with this version to remote code execution risks.

Exploitation Mechanism

To exploit CVE-2021-34893, attackers can lure targets into visiting a malicious web page or opening a corrupted file, triggering the execution of arbitrary code.

Mitigation and Prevention

Protecting systems against CVE-2021-34893 involves immediate actions and long-term security measures.

Immediate Steps to Take

Users should refrain from interacting with untrusted BMP files, websites, or email attachments to mitigate the risk of exploitation. Implementing network security controls and monitoring for unusual activities is crucial.

Long-Term Security Practices

Maintaining up-to-date security patches and conducting regular security audits can help prevent and detect similar vulnerabilities in the future.

Patching and Updates

Vendor patches for Bentley View should be promptly applied to address the CVE-2021-34893 vulnerability and enhance overall system security.