CVE-2021-43276
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 · uneditedAn Out-of-bounds Read vulnerability exists in Open Design Alliance ODA Viewer before 2022.8. Crafted data in a DWF file can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process
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 confidenceAn out-of-bounds read vulnerability exists in ODA Viewer versions prior to 2022.8 when parsing maliciously crafted DWF files. The vulnerability allows reading past the end of an allocated buffer, which can potentially be leveraged alongside other vulnerabilities to achieve arbitrary code execution within the current process context.
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< 2022.8CVSS 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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Locate ODA Viewer installationSearch common installation directories for ODA Viewer executables (e.g., OdaViewer.exe on Windows, OdaViewer on Linux/Mac) or check the program's entry in Add/Remove Programs (Windows), Applications folder (Mac), or package manager (Linux).Affected if ODA Viewer is found on the system
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Determine installed versionRight-click the executable and select Properties > Details to view the File Version, or run 'OdaViewer --version' if the command-line option is supported, or check the program's About/Information dialog within the application.Affected if A version number is returned from the executable
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Compare version to 2022.8Parse the version number found in the previous step and compare it numerically against 2022.8. For example, versions like 2022.7, 2022.6, 2022.1, 2021.12, etc. are all earlier than 2022.8.Affected if The installed version is lower than 2022.8 (e.g., 2022.7, 2022.0, 2021.x)
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Confirm DWF file handling is possibleVerify that the ODA Viewer installation includes the DWF file format handler. This is typically included by default in the Viewer as its primary purpose, but check if DWF import/export modules are present in the installation directory.Affected if DWF file handling capability exists in the installation
A user is affected if ODA Viewer version 2022.8 or later is NOT installed and the viewer is used to open DWF files from any source.
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 · scoped2022.8
Update ODA Viewer to version 2022.8 or later to patch the vulnerability. Until then, avoid opening DWF files from untrusted sources.
ODA Viewer 2022.8 or later
- Obtain ODA Viewer version 2022.8 or later from the official Open Design Alliance website (www.opendesign.com)
- Verify the current installed version of ODA Viewer
- Download and install the updated version (2022.8 or newer)
- Restart any applications using ODA Viewer components
- Validate that DWF files process correctly in the updated version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
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Free · runs locallyCheck whether your project pulls in CVE-2021-43276 — 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-2021-43276 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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