PT-2021-20773 · Bentley · Bentley View

Mat Powell · Published 2021-12-08 · Updated 2022-01-14 · CVE-2021-34929

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Bentley View version 10.15.0.75

Description: This issue allows remote attackers to execute arbitrary code on affected installations. User interaction is required, where the target must visit a malicious page or open a malicious file. The flaw exists within the parsing of JT files, specifically when crafted data in a JT file can trigger a write past the end of an allocated buffer. This can be leveraged to execute code in the context of the current process.

Recommendations: For Bentley View version 10.15.0.75, consider avoiding the use of JT files from untrusted sources until a patch is available. As a temporary workaround, restrict access to the JT file parsing functionality to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-34929

ZDI-21-1517

Affected Products

Bentley View

References · 4

• https://bentley.com/en/common-vulnerability-exposure/BE-2021-0005 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34929 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1517 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34929 · Vendor Advisory