{"schemaVersion":3,"id":"CVE-2019-18948","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An issue was found in Arista EOS. Specific malformed ARP packets can impact the software forwarding of VxLAN packets. This issue is found in Arista’s EOS VxLAN code, which can allow attackers to crash the VxlanSwFwd agent. This affects EOS 4.21.8M and below releases in the 4.21.x train, 4.22.3M and below releases in the 4.22.x train, 4.23.1F and below releases in the 4.23.x train, and all releases in 4.15, 4.16, 4.17, 4.18, 4.19, 4.20 code train.","dates":{"published":"2020-04-16T16:52:56.000Z","modified":"2024-08-05T02:02:39.867Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01044,"percentile":0.63567,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01044},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01044,"percentile":0.63567}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01044,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01044,"percentile":0.63567}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"arista","product":"eos","name":"eos","label":"eos","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 4.21.0, ≤ 4.21.8m","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.22.0, ≤ 4.22.3m","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.23.0, ≤ 4.23.1f","noFixRecorded":false,"fixedIn":null},{"text":"4.15","noFixRecorded":false,"fixedIn":null},{"text":"4.16","noFixRecorded":false,"fixedIn":null},{"text":"4.17","noFixRecorded":false,"fixedIn":null},{"text":"4.18","noFixRecorded":false,"fixedIn":null},{"text":"4.19","noFixRecorded":false,"fixedIn":null},{"text":"4.20","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.21.0, ≤ 4.21.8m | ≥ 4.22.0, ≤ 4.22.3m | ≥ 4.23.0, ≤ 4.23.1f | 4.15 | 4.16 | 4.17 | 4.18 | 4.19 | 4.20","eol":null,"hubHref":"/vendor/arista/eos"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/10292-security-advisory-47","label":"www.arista.com/en/support/advisories-notices/security-advisories/10292-security-advisory-47","hostname":"www.arista.com","tags":["X Refsource CONFIRM","Patch","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-04-16T16:52:56.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T02:02:39.867Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T23:24:03.578Z","stale":false,"partial":false}}