Advisory Details

January 31st, 2022

Bentley MicroStation CONNECT JT File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-22-154
ZDI-CAN-15028

CVE ID CVE-2021-46567
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Bentley
AFFECTED PRODUCTS MicroStation CONNECT
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT. 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.

ADDITIONAL DETAILS Bentley has issued an update to correct this vulnerability. More details can be found at:
https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0005
DISCLOSURE TIMELINE
  • 2021-10-06 - Vulnerability reported to vendor
  • 2022-01-31 - Coordinated public release of advisory
CREDIT xina1i
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