CVE-2020-9085
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 · uneditedThere is a NULL pointer dereference vulnerability in some Huawei products. An attacker may send specially crafted POST messages to the affected products. Due to insufficient validation of some parameter in the message, successful exploit may cause some process abnormal. (Vulnerability ID: HWPSIRT-2017-10105) This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2020-9085.
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 NULL pointer dereference vulnerability exists in certain Huawei products. Attackers can exploit this by sending specially crafted POST messages with insufficiently validated parameters, causing process abnormal behavior (denial of service). The root cause is lack of proper input validation on specific parameters within incoming HTTP POST requests.
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= b612s-25dtcpu-v100r001b192d03sp00c234= b612s-25dtcpu-v100r001b192d03sp00c287= b612s-25dtcpu-v100r001b192d05sp00c00CVSS 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
- None
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.
-
Identify the device modelAccess the router admin interface or check the device label to confirm the model is Huawei B612.Affected if The device is not a Huawei B612 router.
-
Check the firmware versionLog into the router web interface (typically 192.168.1.1) and navigate to System Settings > Device Information, or use the AT command 'AT+CGMR' via serial/terminal to retrieve the firmware version.Affected if The installed firmware version is one of: b612s-25dtcpu-v100r001b192d03sp00c234, b612s-25dtcpu-v100r001b192d03sp00c287, or b612s-25dtcpu-v100r001b192d05sp00c00.
-
Verify HTTP POST handler is accessibleConfirm the router web management interface is reachable over HTTP/HTTPS. The vulnerability is triggered via specially crafted POST requests to the router's web server.Affected if The router admin interface is exposed and accepts HTTP POST requests.
-
Check for abnormal process behaviorMonitor the router's process stability. Look for unexpected process crashes or device restarts, particularly after receiving malformed HTTP POST requests.Affected if The device exhibits frequent crashes or reboots without other apparent causes.
You are affected if you have a Huawei B612 router running one of the three specific firmware versions listed and the web management interface is accessible.
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 dataApply Huawei vendor patches or firmware updates for affected products. Until patches are available, implement proper input validation on the affected systems to reject malformed POST message parameters.
- Consultation4.0 h
- Implementation8.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9085 — 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-2020-9085 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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