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Bentley ViewApplication · Bentley

CVE-2021-34871

HIGH · 7.8 CVSS v3.1 Published 2022-01-13
Fix available
A fix is available. Upgrade to 10.16.02 or later.
See remediation →
81/100
Remediation priority · High
No privileges

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 · unedited
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 BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14695.

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 confidence

Heap-based buffer overflow in Bentley View's BMP file parser. The application fails to validate the length of user-supplied data before copying it to a heap buffer during BMP parsing, allowing remote code execution in the context of the current process.

MitigationUpdate to the latest Bentley View version or apply vendor-provided patches. Until then, avoid opening untrusted BMP files from unknown sources.

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
Bentley ViewApplication
Affected:< 10.16.02
MicrostationApplication
Affected:< 10.16.02

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Bentley View or Microstation is installed
    Check for Bentley View or Microstation in the list of installed programs on the system (Windows: Programs and Features, Linux: package manager, or search for bentley or microstation in program directories)
    Affected if Either Bentley View or Microstation is present on the system
  2. Determine the installed version of Bentley View or Microstation
    Open the application, go to Help > About, or check the program's properties in the installation directory to find the exact version number
    Affected if The version is lower than 10.16.02 (for example, 10.15.x, 10.14.x, or earlier)
  3. Confirm BMP file handling capability is present
    Attempt to open a BMP file in the application or check if BMP is listed as a supported image format in the application's file open dialog filter
    Affected if BMP files can be opened or previewed in the application
  4. Check if the system processes BMP files from untrusted or external sources
    Review workflows where the application may automatically or manually open BMP files from email attachments, downloaded files, network shares, or user-provided content
    Affected if Users can open BMP files from untrusted or unknown sources using the affected application

The system is affected if either Bentley View or Microstation is installed with a version lower than 10.16.02 and the application can be used to open BMP files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 10.16.02 or later
Fixed in 10.16.02
Interim mitigation

Update to the latest Bentley View version or apply vendor-provided patches. Until then, avoid opening untrusted BMP files from unknown sources.

Recommended fix High confidence

10.16.02

  1. Obtain the latest version of Bentley View or Microstation from the official Bentley website or your organization's software distribution channel
  2. Ensure all users close any running instances of Bentley View or Microstation before proceeding
  3. Download the installer for version 10.16.02 or later from Bentley's support portal
  4. Run the installer with appropriate administrative privileges
  5. Follow the on-screen installation prompts to complete the upgrade
  6. After installation, verify the version by checking Help > About in the application

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Bentley View Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing5.0 h
  • Review / QA3.0 h
17.0 hours of engineering $2,970
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,752.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-34871 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data