All Advisories / BE-2021-0011


BE-2021-0011: Use-after-free vulnerabilities in MicroStation and MicroStation-based applications

Bentley ID: BE-2021-0011
CVE ID: CVE-2021-46613, CVE-2021-46627
Severity: 7.8
Publication date: 2021-12-07
Revision date: 2021-12-07

MicroStation and MicroStation-based applications may be affected by a use-after-free vulnerabilities when opening maliciously crafted DXF files. Exploiting these vulnerabilities could lead to code execution.

The following vulnerabilities related to this advisory was discovered by TrendMicro ZDI: ZDI-CAN-15407, ZDI-CAN-15457. Using an affected version of MicroStation or MicroStation-based application to open a DXF file containing maliciously crafted data can trigger use-after-free vulnerabilities. Exploitation of these vulnerabilities within the parsing of DXF 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 DXF files coming from trusted sources.

Thanks to Mat Powell of Trend Micro Zero Day Initiative for discovering these vulnerabilities.

Revision History

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

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