PT-2022-12876 · Bentley · Bentley Microstation Connect

Mat Powell · Published 2022-01-31 · Updated 2022-02-28 · CVE-2021-46638

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Bentley MicroStation CONNECT version 10.16.0.80

Description This issue allows remote attackers to execute arbitrary code on affected installations. User interaction is required, where the target must visit a malicious page or open a malicious file. The flaw exists within the parsing of DGN files due to the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this to execute code in the context of the current process.

Recommendations For Bentley MicroStation CONNECT version 10.16.0.80, update to a version that addresses the DGN file parsing stack-based buffer overflow issue to prevent remote code execution. As a temporary workaround, consider restricting the opening of DGN files from untrusted sources to minimize the risk of exploitation.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2021-46638

ZDI-22-225

Affected Products

Bentley Microstation Connect

References · 4

• https://zerodayinitiative.com/advisories/ZDI-22-225 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46638 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46638 · Security Note
• https://bentley.com/en/common-vulnerability-exposure/BE-2021-0009 · Vendor Advisory