CVE-2021-31496
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 OpenText Brava! Desktop 16.6.3.84. 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 DXF files. The issue results from the lack of proper validation of user-supplied data, which can result in 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-13308.
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 confidenceBuffer overflow vulnerability in OpenText Brava! Desktop 16.6.3.84 allows remote code execution via malicious DXF files. The flaw exists in DXF file parsing where insufficient validation of user-supplied data enables writing past the end of an allocated buffer, giving attackers execution in 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= 16.6.3.84CVSS 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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Verify Brava! Desktop installationCheck for the presence of OpenText Brava! Desktop in the system program files directory, Windows registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, or via the Add/Remove Programs control panelAffected if The software is installed on the system
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Confirm installed versionLocate the Brava! Desktop executable (typically in Program Files or Program Files (x86)) and check its file properties, or query the Windows registry for the version value under the uninstall keyAffected if The installed version is exactly 16.6.3.84
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Check DXF processing capabilityExamine Brava! Desktop configuration files, settings, or the application interface to determine if DXF file import, conversion, or viewing features are enabledAffected if DXF file handling functionality is present and available for use
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Review DXF file activity logsCheck application logs, Windows Event Viewer, or recently accessed files in the Brava! Desktop user directories for evidence of DXF file processingAffected if The application has recently processed or opened DXF files, or is configured to auto-process them
The environment is affected only if OpenText Brava! Desktop version 16.6.3.84 is installed AND the DXF file processing feature is available or has been used with untrusted 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.
From vendor dataAvoid opening untrusted or unknown DXF files; keep software updated with vendor patches when available; consider network segmentation to limit exposure.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-31496 — 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-2021-31496 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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