Advisory Details

January 31st, 2022

Bentley View DGN File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-22-229
ZDI-CAN-15514

CVE ID CVE-2021-46642
CVSS SCORE 3.3, (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
AFFECTED VENDORS Bentley
AFFECTED PRODUCTS View
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View. 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 DGN files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary 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-2021-0009
DISCLOSURE TIMELINE
  • 2021-10-06 - 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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