CVE-2021-46565: 
Bentley MicroStation CONNECT vulnerability analysis and mitigation

This vulnerability (CVE-2021-46565) affects Bentley MicroStation CONNECT version 10.16.0.80. The vulnerability allows remote attackers to execute arbitrary code on affected installations. User interaction is required to exploit this vulnerability, as the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of JT files and results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer (Zero Day Initiative, Vendor Advisory).

The vulnerability is a stack-based buffer overflow that occurs during the parsing of JT files. The issue stems from insufficient validation of user-supplied data length before copying it to a stack-based buffer. The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the following vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (Zero Day Initiative).

An attacker can leverage this vulnerability to execute arbitrary code in the context of the current process. The successful exploitation could lead to complete compromise of the affected system with the same privileges as the application running the vulnerable code (Zero Day Initiative).

Bentley has released version 10.16.02.* and more recent versions to address this vulnerability. Users are recommended to update to the latest version of MicroStation and MicroStation-based applications. As a general best practice, it is also recommended to only open JT files coming from trusted sources (Vendor Advisory).