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CVE Record

CVE-2020-24717: OpenZFS before 2.0.0-rc1, when used on FreeBSD, misinterprets group permissions as user permissions, as dem...

OpenZFS before 2.0.0-rc1, when used on FreeBSD, misinterprets group permissions as user permissions, as demonstrated by mode 0770 being equivalent to mode 0777.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw affects OpenZFS on FreeBSD before 2.0.0-rc1. The system can treat group-only permissions as if they were available to everyone, so files or directories intended for a limited group may be exposed to other local users.

Executive priority

Prioritize remediation where FreeBSD OpenZFS systems host shared or sensitive data for multiple users. Single-user or tightly controlled systems are lower urgency, but should still be updated through normal maintenance.

Technical view

CVE-2020-24717 is a FreeBSD-specific OpenZFS permission interpretation issue. The CVE describes group permissions being misread as user permissions, with mode 0770 behaving like 0777. The public bundle links the fixing OpenZFS commit and FreeBSD review, but provides no CVSS, CWE, or detailed affected-package matrix.

Likely exposure

Exposure is most likely on FreeBSD systems running OpenZFS before 2.0.0-rc1, especially multi-user hosts or shared storage where POSIX mode bits enforce separation. Evidence does not establish other operating systems or downstream products as affected.

Exploitation context

No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. The practical risk is unauthorized local access to data protected mainly by group permissions, rather than remote compromise.

Researcher notes

The source bundle is sparse: no CVSS, CWE, package matrix, or exploit details are provided. The strongest technical anchors are the CVE description, OpenZFS fixing commit, FreeBSD review D26107, and comparison to zfs-2.0.0-rc1.

Mitigation direction

  • Upgrade OpenZFS to 2.0.0-rc1 or a later fixed vendor build.
  • Check FreeBSD and OpenZFS vendor advisories for exact fixed package versions.
  • Review sensitive datasets relying on group-only POSIX permissions.
  • Limit untrusted local account access until fixed versions are confirmed.
  • Use additional access controls for high-value data where available.

Validation and detection

  • Inventory FreeBSD systems using OpenZFS and record their versions.
  • Confirm the deployed ZFS code includes commit 716b53d0a14c72bda16c0872565dd1909757e73f or equivalent.
  • Review directories where group permissions are intended to deny other users.
  • Verify vendor packages map to OpenZFS 2.0.0-rc1 or later fixes.
  • Document any compensating controls for unfixed systems.
Prepared
Confidence
medium
Sources
6

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

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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
5Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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