CVE-2020-35216
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 issue in Atomix v3.1.5 allows attackers to cause a denial of service (DoS) via false member down event messages.
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 confidenceAtomix v3.1.5 lacks proper validation of member down event messages in its cluster membership protocol, allowing remote attackers to send false member down messages that trigger denial of service by falsely marking legitimate cluster members as unavailable.
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= 3.1.5CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:H/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.
-
Identify installed Atomix versionCheck the Atomix JAR file name, manifest, or project dependency file (pom.xml, build.gradle) for the version numberAffected if The installed version is exactly 3.1.5
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Confirm cluster membership is enabledInspect the Atomix configuration for cluster member discovery settings (such as bootstrap nodes, member list, or Raft/MultiRaft group configuration)Affected if Cluster membership protocol is configured and active
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Verify cluster authentication is not configuredReview cluster security settings for authentication, TLS, or message validation mechanisms on member communication channelsAffected if No authentication or message validation is configured for inter-member communication
A user is affected if they are running Atomix version 3.1.5 with cluster membership enabled and without authentication or message validation on cluster communications.
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.
dbcve · scopedImplement authentication and message validation for cluster communication to ensure only legitimate cluster members can send membership events, and add logic to verify the authenticity of member down messages before processing them.
Atomix 3.1.7 or latest stable 3.x release
- 1. Identify the current Atomix version in use by checking project dependencies (e.g., pom.xml, build.gradle, or similar)
- 2. If the current version is 3.1.5, upgrade to the latest stable 3.x release (Atomix 3.1.7 or later)
- 3. Verify the upgrade by checking release notes for security fixes related to CVE-2020-35216
- 4. Run integration tests to ensure the race condition fix does not impact cluster member election functionality
- 5. Deploy the updated version to staging/development environment first
- 6. Monitor for any false member down events in production after deployment
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation12.0 h
- Testing8.0 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 $7,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-35216 — 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-2020-35216 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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