{"id":"CVE-2021-32575","aliases":["ALPINE-CVE-2021-32575","EUVD-2021-1409","GHSA-vf6q-9f2f-mwhv","GO-2022-0709","UBUNTU-CVE-2021-32575"],"status":"published","title":"Improper network isolation in Hashicorp Nomad","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00512,"percentile":0.44159,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1100"],"published":"2021-06-17T18:28:21Z","modified":"2026-11-03T06:32:34Z","fixes":[{"ecosystem":"Go","package":"github.com/hashicorp/nomad","fixed_in":["1.0.5","0.12.12"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.15","package":"nomad","fixed_in":["1.1.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"nomad","fixed_in":["1.1.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"nomad","fixed_in":["1.1.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"nomad","fixed_in":["1.1.1-r0"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/hashicorp/nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.5"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/hashicorp/nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.12"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1-r0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/hashicorp/nomad","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.0.5"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/hashicorp/nomad","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.12.12"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/hashicorp/nomad","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.12.12"},{"introduced":"1.0.0"},{"fixed":"1.0.5"}]}]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4.0+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"nomad","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.7+dfsg1-1ubuntu1"]}],"products":[{"vendor":"hashicorp","product":"nomad"}],"references":[{"url":"https://www.hashicorp.com/blog/category/nomad","tags":["x_refsource_MISC","x_transferred","Product","article","web","report"]},{"url":"https://discuss.hashicorp.com/t/hcsec-2021-14-nomad-bridge-networking-mode-allows-arp-spoofing-from-other-bridged-tasks-on-same-node/24296","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32575","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vf6q-9f2f-mwhv","tags":["advisory"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-32575","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-32575","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-32575","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-32575","description":"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.","status":"published","published":"2021-06-17T18:28:21Z","modified":"2024-08-03T23:25:30.581Z","updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-1409","description":"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.","status":"published","published":"2021-06-17T18:28:21Z","modified":"2024-08-03T23:25:30Z","updated_at":"2026-11-03T03:24:36.41075Z"}],"ghsa":[{"id":"GHSA-vf6q-9f2f-mwhv","title":"Improper network isolation in Hashicorp Nomad","description":"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.","status":"published","published":"2021-06-24T20:28:21Z","modified":"2023-02-01T05:06:09Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-1100"],"updated_at":"2026-11-02T14:36:37.441118Z"}],"nvd":[{"id":"CVE-2021-32575","description":"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.","status":"published","published":"2021-06-17T19:15:07.933Z","modified":"2026-06-17T03:53:12.147Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.3,"vector":"AV:A/AC:L/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:54.892562Z"}],"osv":[{"id":"ALPINE-CVE-2021-32575","description":"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.","status":"published","published":"2021-06-17T19:15:07.933Z","modified":"2026-11-03T06:32:34.142516082Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:20.312441Z"},{"id":"CVE-2021-32575","description":"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.","status":"published","published":"2021-06-17T19:15:07.933Z","modified":"2026-10-24T10:31:04.329767993Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"GHSA-vf6q-9f2f-mwhv","title":"Improper network isolation in Hashicorp Nomad","description":"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.","status":"published","published":"2021-06-24T20:28:21Z","modified":"2024-08-21T15:41:47.417564Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-1100"],"updated_at":"2026-11-02T15:46:56.981655Z"},{"id":"UBUNTU-CVE-2021-32575","description":"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.","status":"published","published":"2021-06-17T19:15:00Z","modified":"2025-10-24T04:50:20Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:27.332852Z"},{"id":"GO-2022-0709","title":"Improper network isolation in Hashicorp Nomad in github.com/hashicorp/nomad","description":"Improper network isolation in Hashicorp Nomad in github.com/hashicorp/nomad","status":"published","published":"2024-08-21T15:21:45Z","modified":"2026-03-03T04:50:45.856676Z","updated_at":"2026-11-02T15:47:00.918515Z"}]}}