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Fencer Vulns
medium 6.5

CVE-2021-32575 json

Improper network isolation in Hashicorp Nomad

published 2021-06-17 5 y ago modified 2026-06-17 4 mo ago also GHSA-vf6q-9f2f-mwhv , GO-2022-0709 , EUVD-2021-1409

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.

Patch / fix

  • go github.com/hashicorp/nomad 0.12.12, 1.0.5
  • nomad Alpine 3.18, Alpine 3.17, Alpine 3.16 +1 more 1.1.1-r0

alpine advisories ALPINE-CVE-2021-32575

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-32575 updated cvss 6.5

nomad: bridge networking mode allows ARP spoofing from other bridged tasks on same node

  • Red Hat Openshift Container Storage 4 mcg, ocs4/cephcsi-rhel8, ocs4/mcg-rhel8-operator, ocs4/ocs-rhel8-operator, ocs4/ocs-must-gather-rhel8, ocs4/rook-ceph-rhel8-operator
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/nomad
>=1.0.0, <1.0.5
<0.12.12
1.0.5
0.12.12

Classification

Weakness
  • CWE-1100 Insufficient Isolation of System-Dependent Functions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.