NifiApplication · Apache
CVE-2020-1942
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 Apache NiFi 0.0.1 to 1.11.0, the flow fingerprint factory generated flow fingerprints which included sensitive property descriptor values. In the event a node attempted to join a cluster and the cluster flow was not inheritable, the flow fingerprint of both the cluster and local flow was printed, potentially containing sensitive values in plaintext.
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 an information disclosure vulnerability in Apache NiFi where the flow fingerprint factory included sensitive property descriptor values (such as passwords or secrets) in generated flow fingerprints. When a node attempts to join a cluster and the cluster flow is not inheritable, the flow fingerprint of both the cluster and local flow is printed to logs, potentially exposing sensitive values in plaintext.
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
NifiApplication
>= 0.0.1, <= 1.11.0CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 NiFi installation versionCheck the NiFi version by inspecting the ABOUT menu in the NiFi UI, or by running: ls -la <nifi-install-dir>/RELEASE or checking the nifi-version.properties fileAffected if Version is between 0.0.1 and 1.11.0 inclusive (vulnerable versions)
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Determine if NiFi is configured in cluster modeInspect the nifi.properties file for cluster configuration: look for 'nifi.cluster.is.node=true' and verify 'nifi.zookeeper.connect.string' is setAffected if NiFi is configured as a cluster node (the vulnerability triggers during cluster join)
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Review cluster join logs for exposed sensitive valuesSearch NiFi logs (in <nifi-install-dir>/logs/) for entries containing 'Flow Fingerprint' or 'fingerprint' during node cluster join operations; examine logs around the time of cluster joinsAffected if Logs contain flow fingerprint output with plaintext sensitive values (passwords, secrets visible in log entries)
A user is affected if running NiFi version 1.11.0 or earlier in cluster mode and cluster join logs contain exposed sensitive values in flow fingerprint output.
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 Apache NiFi to version 1.11.1 or later. Review cluster join logs for any potential exposure of sensitive values and rotate any secrets that may have been disclosed.
Fix this in Nifi
Scoped from the published advisory
- Consultation6.0 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 $6,816.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-1942 — 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-2020-1942 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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