CVE-2017-2892
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 · uneditedAn exploitable arbitrary memory read vulnerability exists in the MQTT packet parsing functionality of Cesanta Mongoose 6.8. A specially crafted MQTT packet can cause an arbitrary out-of-bounds memory read and write potentially resulting in information disclosure, denial of service and remote code execution. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.
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 confidenceArbitrary out-of-bounds memory read/write vulnerability in Cesanta Mongoose 6.8's MQTT packet parsing functionality allows remote attackers to send specially crafted MQTT packets that can read/write to arbitrary memory locations, potentially enabling information disclosure, denial of service, or remote code execution.
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= 6.8CVSS 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 if Cesanta Mongoose is in useSearch your codebase, dependencies, or running services for 'mongoose' or 'Cesanta' references. Check library manifests, package.json, or similar dependency files.Affected if Cesanta Mongoose library or service is present in your environment
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Check the installed Mongoose versionLocate the version identifier in your dependency configuration, binary, or source code. Common locations: package.json, a version header file, or the mongoose.h header. Compare against the affected version = 6.8.Affected if The version is exactly 6.8
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Confirm MQTT protocol support is enabledVerify that MQTT protocol handling is compiled into or loaded by your Mongoose instance. Check build configuration files or runtime flags for MQTT module inclusion.Affected if MQTT protocol support is enabled in your Mongoose build
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Determine if MQTT service is network-exposedReview your network configuration, firewall rules, or service binding settings to check whether the MQTT port (typically 1883) or service is accessible from untrusted networks.Affected if MQTT service is listening on a network interface accessible to potential attackers
Your environment is affected only if you have Cesanta Mongoose version 6.8 with MQTT protocol enabled and exposed to network 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 Cesanta Mongoose to the patched version. If immediate patching is not possible, implement strict network segmentation and input validation on MQTT traffic to limit attack surface until the patch can be applied.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2892 — 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-2017-2892 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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- Version or environment caveats, and links to real fixes
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