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CVE Record

CVE-2013-20001: An issue was discovered in OpenZFS through 2.0.3.

An issue was discovered in OpenZFS through 2.0.3. When an NFS share is exported to IPv6 addresses via the sharenfs feature, there is a silent failure to parse the IPv6 address data, and access is allowed to everyone. IPv6 restrictions from the configuration are not applied.

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 can make an OpenZFS NFS share less restricted than intended. If administrators used sharenfs to limit access by IPv6 address, the IPv6 restriction may silently fail and allow access broadly. Business risk is unauthorized access to shared data where this exact configuration exists.

Executive priority

Prioritize review where NFS shares protect sensitive data or are reachable from untrusted networks. This is not confirmed exploited, but it can turn a narrow access rule into broad data exposure.

Technical view

OpenZFS through 2.0.3 can fail to parse IPv6 address data in sharenfs configuration for NFS exports. The configured IPv6 access restriction is not applied, and access is allowed to everyone. The source bundle provides no CVSS, CWE, or exploit confirmation.

Likely exposure

Exposure is most likely on systems using OpenZFS sharenfs to export NFS shares with IPv6-based client restrictions. Systems without NFS exports, without sharenfs, or without IPv6 restriction rules are less likely to be affected.

Exploitation context

The bundle does not show CISA KEV listing or other evidence of active exploitation. The risk is configuration-dependent: an attacker would need network reachability to an affected NFS export whose intended IPv6 restrictions are not enforced.

Researcher notes

The key weakness is silent policy failure, not memory corruption. Evidence is limited to the CVE description and listed OpenZFS/Debian references; no exploit status, CVSS score, CWE, or exact upstream fixed version is supplied in the bundle.

Mitigation direction

  • Check OpenZFS and operating system vendor advisories for fixed packages.
  • Apply relevant zfs-linux security updates where provided by the distribution.
  • Review NFS exposure and restrict network access outside OpenZFS sharenfs rules.
  • Avoid relying solely on IPv6 sharenfs restrictions until patched and validated.
  • Audit exported datasets for unexpectedly broad NFS access.

Validation and detection

  • Inventory OpenZFS versions and identify systems at or below 2.0.3.
  • List datasets using sharenfs and flag IPv6 client restrictions.
  • Verify NFS exports enforce intended access controls after updates.
  • Review Debian LTS advisories if using Debian zfs-linux packages.
  • Check network controls around NFS services for unintended IPv6 reachability.
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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CVE-2013-20001 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
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

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