CVE-2024-53426
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 heap-buffer-overflow vulnerability has been identified in ntopng 6.2 in the Flow::dissectMDNS function.
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 confidenceA heap-buffer-overflow vulnerability exists in ntopng 6.2 within the Flow::dissectMDNS function, which handles parsing of Multicast DNS traffic. The vulnerability occurs when the function writes data beyond the allocated heap buffer boundary, potentially allowing memory corruption and possibly remote code execution.
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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Verify ntopng is installedRun 'ntopng --version' or 'dpkg -l | grep ntopng' (Debian) / 'rpm -qa | grep ntopng' (RHEL) to confirm ntopng is present and note the installed versionAffected if ntopng is installed and the version is 6.2 or within the affected release line
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Confirm the exact ntopng versionExecute 'ntopng --version 2>&1 | head -1' to extract the precise version number (e.g., 6.2.0, 6.2.1, etc.)Affected if The version shows 6.2.x indicating it falls within the affected release
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Check if MDNS traffic parsing is enabledInspect ntopng configuration files (typically /etc/ntopng/ntopng.conf or /etc/ntopng/ntopng.conf.d/) for 'mdns' or 'mdns.enable' settings, or view runtime settings via the ntopng web interface under 'Preferences' or 'Settings'Affected if MDNS parsing is explicitly enabled in the configuration (value set to '1', 'yes', or 'true')
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Determine if ntopng is capturing network traffic that includes MDNSCheck if ntopng is monitoring an interface that receives mDNS traffic (multicast239.255.255.250 for SSDP, or ff02::fb for MDNS IPv6). Review captured traffic statistics via the web interface or run 'ntopng -i <interface> | grep -i mdns' if availableAffected if ntopng is actively processing traffic on an interface that carries mDNS multicast packets
A system is affected if ntopng version 6.2.x is installed and running with MDNS parsing enabled, as the heap-buffer-overflow vulnerability in Flow::dissectMDNS can be triggered by incoming mDNS traffic.
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 dataUpgrade to a patched version of ntopng if available, or implement proper bounds checking in the dissectMDNS function to validate buffer sizes before memory operations.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-53426 — 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-2024-53426 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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