Bentley ID: BE-2022-0005
CVE ID: CVE-2022-28307, CVE-2022-28311
Severity: 3.3
CVSS v3.1: AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Publication date: 2022-04-05
Revision date: 2022-04-05

Summary
MicroStation and MicroStation-based applications may be affected by out-of-bounds read vulnerabilities when opening maliciously crafted DXF files. Exploiting these vulnerabilities could lead to information disclosure.

Details
The following vulnerabilities related to this advisory were discovered by TrendMicro ZDI: ZDI-CAN-16306 and ZDI-CAN-16341. Using an affected version of MicroStation or MicroStation-based application to open a DXF file containing maliciously crafted data can force an out-of-bounds read. Exploitation of these vulnerabilities within the parsing of DXF files could enable an attacker to read information in the context of the current process.

Affected Versions

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.

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

Revision History