CVE-2021-34881 Explained : Impact and Mitigation

This CVE-2021-34881 article provides an overview of a vulnerability in Bentley View 10.15.0.75, allowing remote attackers to access sensitive information.

Understanding CVE-2021-34881

This section delves into the details of the CVE-2021-34881 vulnerability affecting Bentley View version 10.15.0.75.

What is CVE-2021-34881?

CVE-2021-34881 is a vulnerability that enables remote attackers to uncover sensitive information on affected installations of Bentley View 10.15.0.75. User interaction is needed to exploit this vulnerability, where the target must interact with a malicious page or file. The flaw lies in the parsing of OBJ files due to inadequate validation of user-supplied data, leading to a buffer overflow. Attackers could potentially execute arbitrary code by combining this with other vulnerabilities.

The Impact of CVE-2021-34881

The impact of CVE-2021-34881 is rated as LOW severity according to CVSS v3.0 metrics. It has a base score of 3.3, with low confidentiality impact, no availability impact, and no integrity impact. This vulnerability requires user interaction but has low privilege requirements and no scope change.

Technical Details of CVE-2021-34881

This section provides technical insights into CVE-2021-34881, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

CVE-2021-34881 is categorized under CWE-125 (Out-of-bounds Read) and stems from improper validation of user-supplied data, resulting in a buffer overflow when parsing OBJ files in Bentley View 10.15.0.75.

Affected Systems and Versions

The vulnerability affects Bentley View version 10.15.0.75, exposing installations of this specific version to potential exploitation by remote attackers.

Exploitation Mechanism

To exploit CVE-2021-34881, remote attackers must trick a user into accessing a malicious page or opening a malicious file, leveraging the lack of data validation in OBJ file parsing to execute arbitrary code.

Mitigation and Prevention

In this section, we discuss steps to mitigate the risk posed by CVE-2021-34881 and prevent potential security breaches.

Immediate Steps to Take

Users should apply security patches provided by Bentley to address CVE-2021-34881 promptly. Additionally, users must exercise caution while browsing, avoiding suspicious links or files that could lead to exploitation.

Long-Term Security Practices

To enhance long-term security, users are advised to keep their software up to date, implement secure coding practices, conduct regular security assessments, and stay informed about emerging threats.

Patching and Updates

Bentley may release security patches or updates to resolve CVE-2021-34881. Users should ensure that their software is regularly updated with the latest patches to protect against known vulnerabilities.