Advisory Details

November 30th, 2021

Bentley ContextCapture OBJ File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-21-1367
ZDI-CAN-14784

CVE ID CVE-2021-34984
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 ContextCapture
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley ContextCapture. 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 OBJ 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-2021-0001
DISCLOSURE TIMELINE
  • 2021-09-29 - Vulnerability reported to vendor
  • 2021-11-30 - Coordinated public release of advisory
CREDIT Francis Provencher {PRL}
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