CVE-2024-2421
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 · uneditedLenelS2 NetBox access control and event monitoring system was discovered to contain an unauthenticated RCE in versions prior to and including 5.6.1, which allows an attacker to execute malicious commands with elevated permissions.
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 confidenceThis is an unauthenticated remote code execution vulnerability in LenelS2 NetBox access control and event monitoring system versions 5.6.1 and prior. An attacker without any credentials can send specially crafted requests to execute arbitrary operating system commands with elevated privileges, effectively gaining full control over the affected system.
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< 5.6.2CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 NetBox versionAccess the NetBox web interface and check the version displayed in the About or System Information page, or query the system via administrative console command 'about' or similar version display functionAffected if Installed version is 5.6.1 or lower (any version below 5.6.2)
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Confirm NetBox is runningCheck if the NetBox service or application is actively running on the affected host via service status commands or process listAffected if NetBox service is running and version is below 5.6.2
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Assess network exposure of management interfaceDetermine if the NetBox web management interface (typically ports 80/443 or custom HTTP/HTTPS ports) is accessible from untrusted networks by reviewing firewall rules, external-facing IP bindings, or performing a port scan from an external locationAffected if Management interface is reachable from the internet or untrusted networks without VPN firewall restrictions
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Review for unauthorized access indicatorsExamine NetBox audit logs, system event logs, and authentication logs for suspicious requests, especially from unknown IP addresses, or for execution of unexpected system commandsAffected if Unusual API calls, command executions, or unauthorized administrative actions appear in logs
You are affected if NetBox version is 5.6.1 or lower AND the management interface is network-accessible to untrusted users, allowing unauthenticated attackers to send malicious requests.
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 · scoped5.6.2
Immediately upgrade NetBox to a version newer than 5.6.1 or apply vendor-supplied security patches. If immediate patching is not feasible, restrict network exposure of the NetBox management interface using firewall rules or VPN access to limit attack surface.
5.6.2
- Log into the LenelS2 NetBox administrative interface and navigate to System > Status to confirm the current installed version is below 5.6.2
- Schedule a maintenance window and back up the NetBox configuration and database per vendor documentation
- Download the NetBox version 5.6.2 update package from the official LenelS2/Carrier support portal at www.corporate.carrier.com or through your authorized support channel
- Follow the vendor's documented upgrade procedure for NetBox, which typically involves uploading the update through the web interface or applying via the system administration console
- After upgrade completion, verify the new version number displays as 5.6.2 in System > Status
- Confirm the web interface and access control monitoring functionality operate normally post-upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 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-2024-2421 — 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-2024-2421 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
- No spam, self-promotion, credentials, or personal data