CVE-2021-34892 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-34892, a stack-based buffer overflow vulnerability impacting Bentley View 10.15.0.75. Learn about its impact, affected systems, mitigation steps, and more.
This CVE-2021-34892 article provides detailed insights into a vulnerability affecting Bentley View 10.15.0.75, discovered by Mat Powell of Trend Micro Zero Day Initiative.
Understanding CVE-2021-34892
This section delves into the nature, impact, and technical details of CVE-2021-34892.
What is CVE-2021-34892?
CVE-2021-34892 is a vulnerability that allows remote attackers to execute arbitrary code on Bentley View 10.15.0.75 installations. It requires user interaction to exploit by visiting a malicious page or opening a malicious file. The flaw arises from inadequate validation of user-supplied data's length before copying it to a stack-based buffer.
The Impact of CVE-2021-34892
The impact of this vulnerability is rated as HIGH, with a CVSS base score of 7.8. Attackers can execute code within the current process context, leading to potentially severe outcomes.
Technical Details of CVE-2021-34892
This section provides a deeper dive into the vulnerability's technical aspects.
Vulnerability Description
CVE-2021-34892 is characterized by a stack-based buffer overflow (CWE-121) due to improper data length validation, potentially allowing attackers to execute arbitrary code.
Affected Systems and Versions
Bentley View version 10.15.0.75 is confirmed to be affected by this vulnerability.
Exploitation Mechanism
The vulnerability in this case is exploited through the parsing of JT files, with attackers leveraging the lack of proper data validation to execute malicious code within the target system.
Mitigation and Prevention
To address CVE-2021-34892, immediate steps and long-term security practices are recommended.
Immediate Steps to Take
Users are advised to apply security patches promptly, avoid visiting suspicious websites, and refrain from opening untrusted files to mitigate the risk of exploitation.
Long-Term Security Practices
Implementing robust input validation mechanisms, keeping software updated, and educating users on safe browsing practices can help prevent similar vulnerabilities in the future.
Patching and Updates
Bentley may release patches or updates to address the vulnerability in affected versions.