Advisory Details

December 8th, 2021

Bentley View J2K File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-21-1472
ZDI-CAN-14836

CVE ID CVE-2021-34883
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 J2K 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-2021-0006
DISCLOSURE TIMELINE
  • 2021-08-11 - Vulnerability reported to vendor
  • 2021-12-08 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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