CVE-2025-3007
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 was found in Novastar CX40 up to 2.44.0. It has been rated as critical. This issue affects the function getopt of the file /usr/nova/bin/netconfig of the component NetFilter Utility. The manipulation of the argument cmd/netmask/pipeout/nettask leads to stack-based buffer overflow. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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 confidenceStack-based buffer overflow in the getopt function of /usr/nova/bin/netconfig in Novastar CX40 firmware up to 2.44.0 allows manipulation of cmd/netmask/pipeout/nettask arguments to overflow a stack buffer, potentially enabling code execution or DoS. Public exploit available.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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 Novastar CX40 firmware versionAccess the device's firmware settings or web interface to view the current firmware version; compare against the affected range of 2.44.0 and belowAffected if Firmware version is 2.44.0 or lower (any version up to 2.44.0)
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Verify netconfig binary existsLocate the file /usr/nova/bin/netconfig on the device filesystem using find or ls commandsAffected if The binary exists at the specified path /usr/nova/bin/netconfig
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Confirm netconfig is accessible and in useCheck file permissions and verify the binary is executable; examine if netconfig is invoked by any services or scripts on the deviceAffected if The binary is present and accessible (readable/executable) on the system
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Identify usage of affected argumentsReview any scripts, cron jobs, or web interfaces that invoke netconfig with the cmd, netmask, pipeout, or nettask arguments; use command history or process monitoring if availableAffected if The device uses netconfig with any of the affected arguments (cmd/netmask/pipeout/nettask)
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Check for signs of exploitation or compromiseExamine system logs, running processes, and network connections for anomalies; look for unexpected modifications to the netconfig binary or its behaviorAffected if Indicators of compromise are found, such as unexpected processes, binary modification, or suspicious network activity related to netconfig
A user is affected if they have a Novastar CX40 device running firmware version 2.44.0 or lower with the /usr/nova/bin/netconfig binary accessible and the affected arguments (cmd/netmask/pipeout/nettask) in use.
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 dataNetwork-segment affected devices and restrict access to the netconfig utility; implement input validation on the affected arguments. Contact vendor for patched firmware and monitor for exploitation attempts.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,328.
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Free · runs locallyCheck whether your project pulls in CVE-2025-3007 — 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-2025-3007 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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