BE-2021-0012: Out-of-bounds read and use-after-free vulnerabilities in MicroStation and MicroStation-based applications
Bentley ID: BE-2021-0012
CVE ID: CVE-2021-34886, CVE-2021-46620, CVE-2021-46630
Severity: 3.3 (low)
CVSS v3.1: AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Publication date: 7th December 2021
Revision date: 4th February 2022
MicroStation and MicroStation-based applications may be affected by out-of-bounds read or use-after-free vulnerabilities when opening maliciously crafted FBX files. Exploiting these vulnerabilities could lead to code execution.
The following vulnerabilities related to this advisory were discovered by TrendMicro ZDI: ZDI-CAN-14839, ZDI-CAN-15414, ZDI-CAN-15460.
Using an affected version of MicroStation or MicroStation-based application to open a FBX file containing maliciously crafted data can force an out-of-bounds read or use-after-free vulnerability. Exploitation of these vulnerabilities within the parsing of FBX files could enable an attacker to execute arbitrary code in the context of the current process.
|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|
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 FBX files coming from trusted sources.
Thanks to Mat Powell of Trend Micro Zero Day Initiative for discovering these vulnerabilities.
|7th December 2021||First version of the advisory|
|4th February 2022||Adding new CVE numbers provided by ZDI|