CVE-2021-34939: Bentley View JT File Parsing Use-After-Free Remote Code Execution Vulnerability
First published: Thu Jan 13 2022(Updated: )
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of JT files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14996.
Credit: zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Bentley View | <10.16.02 | |
| Bentley MicroStation | <10.16.02 | |
| Bentley Systems |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-34939?
CVE-2021-34939 is classified as a critical vulnerability, allowing remote code execution on affected systems.
How do I fix CVE-2021-34939?
To mitigate CVE-2021-34939, update Bentley View to version 10.16.02 or later, ensuring all security patches are applied.
What software is affected by CVE-2021-34939?
CVE-2021-34939 affects Bentley View version 10.15.0.75 and Bentley MicroStation versions up to 10.16.02.
What type of attack can exploit CVE-2021-34939?
CVE-2021-34939 can be exploited through user interaction, requiring the target to visit a malicious site or open a malicious file.
Is user interaction necessary for CVE-2021-34939?
Yes, user interaction is necessary for exploiting CVE-2021-34939, as the victim must engage with malicious content.
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