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CVE Record

CVE-2017-3166: In Apache Hadoop versions 2.6.1 to 2.6.5, 2.7.0 to 2.7.3, and 3.0.0-alpha1, if a file in an encryption zone...

In Apache Hadoop versions 2.6.1 to 2.6.5, 2.7.0 to 2.7.3, and 3.0.0-alpha1, if a file in an encryption zone with access permissions that make it world readable is localized via YARN's localization mechanism, that file will be stored in a world-readable location and can be shared freely with any application that requests to localize that file.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Hadoop flaw can turn data intended to stay protected inside an HDFS encryption zone into a world-readable localized copy through YARN. The source evidence does not provide a CVSS score or active-exploitation evidence, but the business risk is unauthorized data exposure in affected Hadoop clusters.

Executive priority

Prioritize review if Hadoop stores regulated, customer, or proprietary data and YARN is used by multiple teams. Treat as a data exposure risk, especially for shared analytics clusters.

Technical view

Affected Apache Hadoop versions mishandle YARN localization for world-readable files located in HDFS encryption zones. When localized, the file is stored in a world-readable location and may be shared with any application requesting that file. Sources classify it as a privilege escalation vulnerability but provide limited technical detail.

Likely exposure

Exposure is most likely in Hadoop clusters running the listed 2.6.x, 2.7.x, or 3.0.0-alpha builds with YARN enabled and HDFS encryption zones containing world-readable files used by applications.

Exploitation context

The provided sources do not show known active exploitation, and the CVE is not marked KEV. Exploitation appears to require access to submit or run YARN applications in an affected cluster and knowledge of localizable world-readable files in encryption zones.

Researcher notes

Evidence is limited to the CVE description and Apache mailing-list references. No CVSS, CWE, exploit details, or explicit fixed version is present in the supplied bundle, so validation should focus on affected-version inventory and configuration conditions.

Mitigation direction

  • Inventory Hadoop versions against the affected ranges listed by Apache and CVE sources.
  • Review Apache Hadoop vendor guidance for fixed releases or supported upgrade paths.
  • Remove world-readable permissions from sensitive files inside HDFS encryption zones.
  • Restrict YARN application submission to trusted users where affected clusters remain in service.
  • Review downstream packaged Hadoop distributions for backported fixes or advisories.

Validation and detection

  • Confirm whether Hadoop versions match 2.6.1-2.6.5, 2.7.0-2.7.3, or 3.0.0-alpha builds.
  • Identify HDFS encryption zones containing files with world-readable permissions.
  • Review YARN application localization usage for files sourced from encryption zones.
  • Check cluster audit logs for unusual access to localized resources.
  • Verify remediation against Apache or distribution vendor release notes.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2017-3166 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Apache Software FoundationApache Hadoop2.6.1 to 2.6.5, 2.7.0 to 2.7.3, 3.0.0-alpha1 to 3.0.0-alpha3Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.