CVE-2020-4383
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 · uneditedIBM Spectrum Scale for IBM Elastic Storage Server 5.3.0 through 5.3.5 could allow an authenticated user to cause a denial of service during deployment while configuring some of the network services. IBM X-Force ID: 179165.
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 · high confidenceIBM Spectrum Scale for IBM Elastic Storage Server versions 5.3.0 through 5.3.5 contains a denial of service vulnerability that can be triggered by an authenticated user during the deployment phase when configuring certain network services, potentially causing service disruption.
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>= 5.3.0, <= 5.3.5CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 installed IBM Spectrum Scale/ESS versionRun the command to display the IBM Spectrum Scale version, typically 'mmgetversion' or check the product documentation for your installation methodAffected if The version displayed is 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, or 5.3.5
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Confirm the exact version numberCross-reference the version output against the precise version string reported by the system, noting any sub-version or patch level indicatorsAffected if The version string starts with 5.3.0 through 5.3.5 inclusive
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Determine if the system is in or approaching a deployment phaseCheck whether initial deployment, re-deployment, or significant configuration changes involving network services are imminent or in progressAffected if Deployment or network services configuration is being performed or planned
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Assess network services configuration activityReview any active or pending configuration of network services performed by authenticated users during the deployment processAffected if An authenticated user is actively configuring network services during deployment
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Verify authentication context for configuration operationsIdentify which authenticated users have access to network service configuration during deploymentAffected if Any authenticated user (including potentially untrusted ones) has access to configure network services during deployment
Your environment is affected if the installed IBM Spectrum Scale/ESS version is between 5.3.0 and 5.3.5 inclusive AND network services configuration by authenticated users during deployment is possible or imminent.
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 IBM Spectrum Scale/ESS to a version beyond 5.3.5 or apply the appropriate IBM fix/patch. During deployment, restrict administrative access to trusted authenticated users only.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-4383 — 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-2020-4383 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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