Advisory Details

January 31st, 2022

Bentley View JT File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

CVE ID	CVE-2021-46656
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	View
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code 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 JT files. Crafted data in a JT file 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-2021-0005
DISCLOSURE TIMELINE	2021-10-13 - 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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