CVE-2020-9041
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 · uneditedIn Couchbase Server 6.0.3 and Couchbase Sync Gateway through 2.7.0, the Cluster management, views, query, and full-text search endpoints are vulnerable to the Slowloris denial-of-service attack because they don't more aggressively terminate slow connections.
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 confidenceCouchbase Server 6.0.3 and Sync Gateway through 2.7.0 are vulnerable to Slowloris DoS attacks on cluster management, views, query, and full-text search endpoints. The affected endpoints fail to aggressively terminate slow connections, allowing attackers to exhaust server resources by holding connections open with minimal data transmission.
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= 6.0.3<= 2.7.0CVSS 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 installed Couchbase productCheck if Couchbase Server or Sync Gateway is installed in your environment. Look for process names 'couchbase' or 'sync_gateway' or check installed packages.Affected if Either Couchbase Server or Sync Gateway is present
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Determine Couchbase Server versionFor Server installations, use the command-line interface: 'couchbase-cli server-info -c localhost -u Administrator -p <password>' or check the About screen in the admin console. The displayed version should be compared to 6.0.3.Affected if Version is exactly 6.0.3
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Determine Sync Gateway versionFor Sync Gateway, check the version via the admin REST API endpoint '/_meta' or run 'sync_gateway --version' if available. The displayed version should be compared to 2.7.0.Affected if Version is 2.7.0 or lower (any version through 2.7.0)
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Verify exposed management endpointsCheck if the cluster management port (8091), view endpoints (/_design/*/_view), query endpoint (/_p/query), or full-text search endpoint (/_p/fts) are exposed to untrusted networks. These are the affected endpoints.Affected if Any of these endpoints are accessible from untrusted network segments
You are affected if you are running Couchbase Server 6.0.3 or Sync Gateway 2.7.0 or lower, AND the cluster management, views, query, or full-text search endpoints are exposed to network traffic where an attacker could establish slow connections.
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 dataConfigure aggressive connection timeouts and connection limits on affected endpoints, or apply vendor patches to address the Slowloris vulnerability.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 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 $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9041 — 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-2020-9041 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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