PT-2022-12877 · Bentley · Bentley Microstation Connect

Mat Powell · Published 2022-01-31 · Updated 2022-02-28 · CVE-2021-46639

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 restricting the use of DGN file parsing functionality until a patch is available. As a temporary workaround, avoid opening malicious files or visiting untrusted websites that could potentially exploit this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-46639

ZDI-22-226

Affected Products

Bentley Microstation Connect

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-46639 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-22-226 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46639 · Vendor Advisory
• https://bentley.com/en/common-vulnerability-exposure/BE-2021-0009 · Vendor Advisory