CVE-2021-34909 Use after free in View
Remote attackers can execute arbitrary code by tricking users into opening malicious JT files in Bentley View due to improper object validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-34909?
CVE-2021-34909 is a high-severity use after free vulnerability in Bentley Bentley View, published on 13 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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-14882.
Weakness: CWE-416
Which versions are affected by CVE-2021-34909?
It affects 2 products.
Products include Bentley Bentley View, Bentley Microstation.
How do I fix CVE-2021-34909?
No fix has been published for CVE-2021-34909 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-34909 being exploited?
There is no known exploitation of CVE-2021-34909 in the wild and no public exploit code.
Other vulnerabilities in Bentley Bentley View
Sources
Also known as GHSA-5856-338g-9v27.