PT-2022-12873 · Bentley · Bentley Microstation Connect

Mat Powell · Published 2022-01-31 · Updated 2022-02-28 · CVE-2021-46635

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, specifically when crafted data in a DGN file can trigger a write past the end of an allocated buffer. This can be leveraged to execute code in the context of the current process.

Recommendations For Bentley MicroStation CONNECT version 10.16.0.80, consider avoiding the use of DGN files from untrusted sources until a patch is available. As a temporary workaround, restrict the parsing of DGN files to minimize the risk of exploitation.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-46635

ZDI-22-222

Affected Products

Bentley Microstation Connect

References · 4

• https://zerodayinitiative.com/advisories/ZDI-22-222 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46635 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46635 · Vendor Advisory
• https://bentley.com/en/common-vulnerability-exposure/BE-2021-0009 · Vendor Advisory