What is CVE-2021-46639?

CVE-2021-46639 is a high-severity vulnerability in Bentley Microstation, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-18.

How severe is CVE-2021-46639?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Bentley Microstation

CVE-2021-46639

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. 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 DGN files. Crafted data in a DGN 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. Was ZDI-CAN-15511.

Vulnerability class: Buffer Overflow

EPSS: 0.021 (79.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Bentley Microstation
Bentley Microstation Connect — versions 10.16.0.80
Bentley Microstation_connect
Bentley View

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

zdi-disclosures@trendmicro.com (x_refsource_MISC, Vendor Advisory)
zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-46639?: CVE-2021-46639 is a high-severity vulnerability in Bentley Microstation, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-18.
How severe is CVE-2021-46639?: High severity. CVSS v3 base score is 7.8 out of 10.