All Advisories / BE-2021-0004

BE-2021-0004

BE-2021-0004: Out-of-bounds and use-after-free vulnerabilities in MicroStation and MicroStation-based applications

Bentley ID: BE-2021-0004
CVE ID: CVE-2021-34874, CVE-2021-34875, CVE-2021-34880, CVE-2021-34889, CVE-2021-34894, CVE-2021-34895, CVE-2021-34901, CVE-2021-34911, CVE-2021-46575, CVE-2021-46586, CVE-2021-46587, CVE-2021-46592, CVE-2021-46595, CVE-2021-46602, CVE-2021-46607, CVE-2021-46623
Severity: 7.8
CVSS v3.1: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Publication date: 2021-12-07
Revision date: 2021-12-07

Summary
MicroStation and MicroStation-based applications may be affected by out-of-bounds and use-after-free vulnerabilities when opening maliciously crafted 3DS files. Exploiting these vulnerabilities could lead to code execution.

Details
The following vulnerabilities related to this advisory were discovered by TrendMicro ZDI : ZDI-CAN-14736, ZDI-CAN-14827, ZDI-CAN-14833, ZDI-CAN-14842, ZDI-CAN-14847, ZDI-CAN-14862, ZDI-CAN-14874, ZDI-CAN-14884, ZDI-CAN-15369, ZDI-CAN-15380, ZDI-CAN-15381, ZDI-CAN-15386, ZDI-CAN-15389, ZDI-CAN-15396, ZDI-CAN-15401, ZDI-CAN-15453. Using an affected version of MicroStation or MicroStation-based application to open a 3DS file containing maliciously crafted data can force an out-of-bounds or use-after-free vulnerability. Exploitation of these vulnerabilities within the parsing of 3DS files could enable an attacker to execute arbitrary code in the context of the current process.

Affected Versions

Applications Affected Versions Mitigated Versions
MicroStation Versions prior to 10.16.02.* 10.16.02.* and more recent
Bentley View Versions prior to 10.16.02.* 10.16.02.* and more recent

 

Recommended Mitigations
Bentley recommends updating to the latest versions of MicroStation and MicroStation-based applications. As a general best practice, it is also recommended to only open 3DS files coming from trusted sources.

Acknowledgement
Thanks to Francis Provencher {PRL} for discovering ZDI-CAN-14736. Thanks to Mat Powell of Trend Micro Zero Day Initiative for discovering the rest of the vulnerabilities related to this advisory

Revision History

Date Description
2021-12-07 First version of this advisory
2022-02-04 Added new CVE numbers provided by ZDI

Be a Part of the Greatest Infrastructure Event

The Year in Infrastructure
2024 Going Digital Awards

Be considered a leader in infrastructure. Submit your project today before our April 15 deadline!