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NULL Pointer DereferenceWeakness · CWE-476

CVE-2024-41883

MEDIUM · 6.9 CVSS v4.0 Published 2024-12-24
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
75/100
Remediation priority · High
Remotely reachable Zero-click

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 · unedited
Team ENVY, a Security Research TEAM has found a flaw that allows for a remote code execution on the NVR . An attacker enters a special value for a specific URL parameter, resulting in a NULL pointer reference and a reboot of the NVR. The manufacturer has released patch firmware for the flaw, please refer to the manufacturer's report for details and workarounds.

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 confidence

A remote code execution vulnerability exists in certain NVR (Network Video Recorder) devices. The flaw is triggered when an attacker provides a specially crafted value for a specific URL parameter, which causes a NULL pointer reference resulting in device reboot. The manufacturer has released patch firmware to address this issue.

MitigationApply the manufacturer-provided patch firmware to affected NVR devices as soon as possible. If immediate patching is not feasible, consider network segmentation to limit exposure to untrusted actors.

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
Network
Complexity
Low
Privileges
High
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify NVR device firmware version
    Access the NVR web interface and navigate to System > System Info, or log in via CLI and run 'version' or 'show firmware' command
    Affected if Firmware version is unpatched and falls within the affected version range
  2. Verify web management interface is enabled
    Check NVR network settings to confirm the web server/HTTP service is running and accessible
    Affected if Web management interface is enabled and exposed to network
  3. Review remote access configuration
    Check NVR network settings for enabled protocols (HTTP/HTTPS) and any port forwarding or NAT configurations that expose the web interface
    Affected if The device web interface is accessible from external or untrusted networks
  4. Inspect for unusual device behavior
    Monitor device logs and network traffic for repeated reboot events or NULL pointer dereference indicators, especially after processing URL requests
    Affected if Device exhibits unexplained reboot cycles or crash logs involving URL parameter processing

A user is affected if their NVR device runs an unpatched firmware version and has the web management interface enabled, making it vulnerable to specially crafted URL parameter requests that trigger the NULL pointer reference.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the manufacturer-provided patch firmware to affected NVR devices as soon as possible. If immediate patching is not feasible, consider network segmentation to limit exposure to untrusted actors.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-41883 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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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