CVE-2021-44047
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 · uneditedA use-after-free vulnerability exists when reading a DWF/DWFX file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists with parsing DWF/DWFX files. Crafted data in a DWF/DWFX file and lack of proper validation of input data can trigger a write operation past the end of an allocated buffer. An attacker can leverage this vulnerability to execute 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 confidenceA use-after-free vulnerability exists in Open Design Alliance Drawings SDK versions prior to 2022.11 when parsing DWF/DWFX files. The vulnerability stems from improper validation of input data during file parsing, which allows a crafted DWF/DWFX file to trigger a write operation beyond the allocated buffer boundaries, potentially enabling arbitrary code execution in the context of the current 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< 2022.11CVSS 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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Identify ODA Drawings SDK presenceLocate the ODA Drawings SDK library files in your application or system. Common library names include OdDbDwg.dll, OdDwf6.dll, or similar files. Check your application's dependencies, linked libraries, or installer documentation to confirm the SDK is present.Affected if The ODA Drawings SDK library files are found in the application or system
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Determine the installed SDK versionCheck the version information of the ODA library files. Right-click the DLL file, select Properties, and view the Version tab. Alternatively, check SDK release notes, version headers, or the file version string embedded in the library.Affected if The version is prior to 2022.11 or cannot be verified as 2022.11 or later
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Confirm DWF/DWFX file processing capabilityReview application logs, code, or configuration to determine if the application can open, import, render, or otherwise process DWF or DWFX files. Check if DWF/DWFX is listed as a supported format in the application's documentation or file dialogs.Affected if The application has the capability to process DWF or DWFX files
You are affected if your environment contains ODA Drawings SDK version prior to 2022.11 AND the application processes DWF/DWFX 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 · scoped2022.11
Update Open Design Alliance Drawings SDK to version 2022.11 or later to patch the vulnerability. Until the update is applied, implement additional input validation and file parsing safeguards for DWF/DWFX files processed by the application.
Drawings SDK 2022.11
- Upgrade Open Design Alliance Drawings SDK to version 2022.11 or later
- Ensure all applications or services using the Drawings SDK are rebuilt against the updated library
- Re-scan or re-validate any DWF/DWFX files that were processed by the vulnerable version to ensure they were not compromised
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-44047 — 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-2021-44047 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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- Version or environment caveats, and links to real fixes
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