CVE-2023-43505
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 vulnerability has been identified in COMOS (All versions). The affected application lacks proper access controls in SMB shares. This could allow an attacker to access files that the user should not have access to.
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 · moderate confidenceCOMOS fails to enforce proper access controls on SMB shares, allowing authenticated users to access files outside their authorized scope. This improper authorization in the SMB share configuration permits information disclosure of files the user should not have permissions to read.
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 dataall versionsCVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 COMOS SMB share configurationsReview COMOS installation documentation and server configuration to locate all SMB shares used for COMOS data storage. Check Windows Server shares or network share mappings configured in COMOS.Affected if COMOS uses SMB shares for file storage and the share permissions are not properly restricted to authorized user scopes.
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Review SMB share-level permissionsOpen Computer Management > Shared Folders > Shares. Right-click each COMOS-related share > Properties > Share Permissions tab. Verify which users/groups have access and what permissions (Read/Change/Full Control) are granted.Affected if Users other than those explicitly authorized for specific data scopes have access to the share, or overly broad groups (like Everyone, Domain Users) are granted access.
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Inspect NTFS permissions on shared foldersRight-click the shared folder > Properties > Security tab. Review the NTFS permissions for users and groups. Check if permissions are scoped to specific user roles or if unauthorized users have Read or Read&Execute access.Affected if NTFS permissions allow authenticated users to access files outside their designated role or project scope.
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Verify user role-to-folder mappingCross-reference COMOS user role assignments with the actual folder structure on SMB shares. Document which folders each user role should legitimately access versus what they can actually reach via the share.Affected if Users can navigate to or list directories containing files for projects or data sets outside their assigned role.
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Test unauthorized access possibilityUsing a test account with limited COMOS permissions, attempt to access file paths on the SMB share that belong to other users, projects, or departments. Verify if the file server permits this access despite COMOS-level restrictions.Affected if An authenticated user can read files they should not have permission to read according to COMOS role assignments.
A user is affected if COMOS uses SMB shares and authenticated users can access files outside their authorized COMOS role scope through the share configuration.
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 dataImplement proper NTFS and SMB share-level permissions to restrict file access based on user roles and least-privilege principles. Review and audit all SMB share configurations in COMOS environments.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-43505 — 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-2023-43505 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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