CVE-2021-34932
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThis 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. Crafted data in a JT file can trigger a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14910.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA buffer overflow vulnerability exists in Bentley View 10.15.0.75 when parsing JT files. The vulnerability is triggered when the application processes a maliciously crafted JT file, causing a write operation to extend beyond the boundaries of an allocated buffer. This memory corruption can be leveraged by an attacker to execute arbitrary code within the context of the current user process.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 10.16.02< 10.16.02CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if Bentley View is installedLocate the Bentley View installation directory, typically under C:\Program Files\Bentley\View or check Programs and Features in Control Panel for Bentley View entryAffected if Bentley View is installed and version is below 10.16.02
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Check if Microstation is installedLocate the Microstation installation directory, typically under C:\Program Files\Bentley\Microstation or check Programs and Features in Control Panel for Microstation entryAffected if Microstation is installed and version is below 10.16.02
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Determine exact installed versionRight-click the executable (BentleyView.exe or Microstation.exe), select Properties, and check the File Version field under the Details tabAffected if Version number is lower than 10.16.02 for either product
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Check for JT file association or recent JT file usageSearch for .jt files on the system using File Explorer, or check recent file lists in the application to see if JT parsing is usedAffected if The application is used to open or has opened JT files from potentially untrusted sources
User is affected if either Bentley View or Microstation is installed with a version below 10.16.02 and the application is used to parse JT files.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped10.16.02
Users should avoid opening JT files from untrusted sources. Organizations should deploy the vendor patch when available and implement endpoint protection controls to detect malicious file operations.
10.16.02
- Obtain the fixed version (10.16.02) or later from the official Bentley support website or your Bentley licensing portal
- Uninstall the current version of Bentley View if installed
- Install Bentley View version 10.16.02 or later
- If MicroStation is also affected, uninstall the current version of MicroStation
- Install MicroStation version 10.16.02 or later
- Verify the installation by checking the software version in Help > About
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-34932 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-34932 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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