Advisory Details

January 31st, 2022

Bentley MicroStation CONNECT BMP File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-22-232
ZDI-CAN-15531

CVE ID CVE-2021-46645
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 BMP images. Crafted data in a BMP image can trigger a write past the end of an allocated buffer. 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-2021-0002
DISCLOSURE TIMELINE
  • 2021-10-08 - Vulnerability reported to vendor
  • 2022-01-31 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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