CVE-2020-1870
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 denial of service vulnerability in some Huawei products. Due to improper memory management, memory leakage may occur in some special cases. Attackers can perform a series of operations to exploit this vulnerability. Successful exploit may cause a denial of service. Affected product versions include: CloudEngine 12800 versions V200R019C00SPC800; CloudEngine 5800 versions V200R019C00SPC800; CloudEngine 6800 versions V200R005C20SPC800, V200R019C00SPC800; CloudEngine 7800 versions V200R019C00SPC800; NE40E versions V800R011C00SPC200, V800R011C00SPC300, V800R011C10SPC100; NE40E-F versions V800R011C00SPC200, V800R011C10SPC100; NE40E-M versions V800R011C00SPC200, V800R011C10SPC100.
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 confidenceThis is a memory leak vulnerability in Huawei network products (CloudEngine series switches and NE40E routers) caused by improper memory management. Attackers can perform a series of operations to trigger memory leakage, eventually leading to denial of service when system resources are exhausted.
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= v200r019c00= v200r019c00spc600= v200r019c00spc800= v200r019c10= v200r019c00spc800CVSS 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
- High
CVSS:3.1/AV:N/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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Identify the device modelLog into the device and run 'display device' or 'display version' to confirm the hardware model (CloudEngine 12800 or CloudEngine 6800 or NE40E)Affected if Device is a CloudEngine 12800, CloudEngine 6800, or NE40E series
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Check the firmware versionRun 'display version' and locate the VRP version information. Compare against affected versions: v200r019c00, v200r019c00spc600, v200r019c00spc800, v200r019c10 for CloudEngine 12800; v200r019c00spc800 for CloudEngine 6800Affected if Firmware version exactly matches any of the listed affected versions
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Monitor memory usage over timeRun 'display memory' or 'display memory-usage' periodically to observe if memory usage continuously increases without returning to baseline levelsAffected if Memory usage shows consistent upward trend indicating potential leak
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Check for the vulnerable operationsReview logs and traffic patterns for repeated sequences of specific operations that trigger the memory leak (the exact operation sequence is vendor-specific)Affected if Repeated triggering operations are occurring against the device
The device is affected if it is a CloudEngine 12800 or 6800 running one of the exact affected firmware versions listed, and the device is processing traffic that could trigger the memory leak condition.
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 the vendor-provided firmware patches for the specific affected versions (V200R019C00SPC800, V200R005C20SPC800, V800R011C00SPC200, V800R011C00SPC300, V800R011C10SPC100) during a scheduled maintenance window, as no effective workarounds are available for memory management vulnerabilities.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-1870 — 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-2020-1870 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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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
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