Vulnerability CVE-2021-34891


Published: 2022-01-13

Description:
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. 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 JT files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14844.

Type:

CWE-416

(Use After Free)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Bentley -> Bentley view 
Bentley -> Microstation 

 References:
https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0005
https://www.zerodayinitiative.com/advisories/ZDI-21-1480/

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