CVE-2023-5253
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 missing authentication check in the WebSocket channel used for the Check Point IoT integration in Nozomi Networks Guardian and CMC, may allow an unauthenticated attacker to obtain assets data without authentication. Malicious unauthenticated users with knowledge on the underlying system may be able to extract limited asset information.
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 confidenceThis is an authentication bypass vulnerability in Nozomi Networks Guardian and CMC where the WebSocket channel used for Check Point IoT integration lacks proper authentication checks. An unauthenticated attacker can connect to the WebSocket endpoint and retrieve limited asset information without providing any credentials.
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< 23.3.0< 23.3.0CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/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 installed product versionLocate the installed version of Nozomi Networks CMC or Guardian in the system administration interface or via command line (typically via 'version' command or system info page)Affected if The installed version is below 23.3.0 (e.g., 23.2.x, 23.1.x, earlier releases)
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Determine if Check Point IoT integration is configuredAccess the integrations or plugins configuration section within the Nozomi Networks admin interface and check for active Check Point IoT integrationAffected if The Check Point IoT integration is enabled and configured on the system
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Verify WebSocket endpoint accessibilityAttempt to access the WebSocket endpoint used for Check Point IoT (typically at /ws/iot or similar path under the Check Point integration URL) without providing authentication credentials using a WebSocket client toolAffected if The WebSocket connection is accepted and returns asset information without requiring authentication
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Review network exposure of management interfaceCheck firewall rules, access control lists, or network segmentation settings to determine if the Nozomi management interface and its WebSocket endpoints are exposed to untrusted networksAffected if The management interface with the WebSocket endpoint is reachable from untrusted or external networks
A system is affected if it runs a version of CMC or Guardian below 23.3.0 AND has the Check Point IoT integration enabled, allowing unauthenticated access to asset data via the WebSocket endpoint.
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 data23.3.0
Apply vendor patches when available. As an immediate mitigation, review and restrict network access to the WebSocket endpoint, or disable the Check Point IoT integration if not required.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-5253 — 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-2023-5253 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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