Security readout for executives and security teams
Plain-English summary
This vulnerability affects HashiCorp Nomad and Nomad Enterprise when jobs use bridge networking. A task on the same node could spoof ARP traffic against other bridged tasks. The issue is fixed in Nomad 0.12.12, 1.0.5, and 1.1.0 RC1.
Executive priority
Prioritize remediation for Nomad clusters that run mixed-trust workloads or multi-tenant jobs. The issue is scoped, but same-node task isolation is a meaningful control boundary.
Technical view
CVE-2021-32575 is an ARP spoofing weakness in Nomad bridge networking mode. The exposure is limited to other bridged tasks running on the same node. The provided sources do not include CVSS, CWE, or detailed impact data beyond the same-node ARP spoofing condition.
Likely exposure
Organizations running HashiCorp Nomad or Nomad Enterprise up to 1.0.4, especially jobs using bridge networking on shared nodes, should treat this as relevant exposure.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation evidence. Exploitation requires a malicious or compromised bridged task co-located on the same Nomad node.
Researcher notes
Evidence is limited to the CVE description and HashiCorp advisory reference. No CVSS vector, CWE, exploit status, or deeper packet-level details were provided in the source bundle.
Mitigation direction
- Upgrade Nomad to 0.12.12, 1.0.5, 1.1.0 RC1, or later supported releases.
- Review HashiCorp advisory guidance for branch-specific upgrade direction.
- Reduce untrusted workload co-location on the same Nomad node where feasible.
- Review jobs using bridge networking for exposure until upgraded.
Validation and detection
- Inventory Nomad and Nomad Enterprise versions across all clusters.
- Identify jobs configured for bridge networking mode.
- Check whether untrusted or mixed-sensitivity tasks share the same node.
- Confirm upgraded clusters report a fixed Nomad release.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-32575 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.hashicorp.com/blog/category/nomadCVE reference · x_refsource_MISC
- https://discuss.hashicorp.com/t/hcsec-2021-14-nomad-bridge-networking-mode-allows-arp-spoofing-from-other-bridged-tasks-on-same-node/24296CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.