{"containers":{"cna":{"affected":[{"product":"EOS","vendor":"Arista Networks","versions":[{"lessThanOrEqual":"4.26.0","status":"affected","version":"4.26.3F","versionType":"custom"},{"lessThanOrEqual":"4.27.0","status":"affected","version":"4.27.0F","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","description":"CWE-284 Improper Access Control","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2022-04-01T22:17:50.000Z","orgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","shortName":"Arista"},"references":[{"tags":["x_refsource_MISC"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"}],"solutions":[{"lang":"en","value":"The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Artista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28504 has been fixed in the following releases:\n\n4.26.4F and later releases in the 4.26.x train\n4.27.1M and later releases in the 4.27.x train"}],"source":{"advisory":"73","defect":["BUG608752"],"discovery":"INTERNAL"},"title":"On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol fi ...","workarounds":[{"lang":"en","value":"Replace \"vxlan\" IP protocol match with match on IP protocol \"udp\" and Layer 4 destination port for VxLAN encapsulated packets i.e 4789. \nIf VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number."}],"x_ConverterErrors":{"TITLE":{"error":"TITLE too long. 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Artista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28504 has been fixed in the following releases:\n\n4.26.4F and later releases in the 4.26.x train\n4.27.1M and later releases in the 4.27.x train"}],"source":{"advisory":"73","defect":["BUG608752"],"discovery":"INTERNAL"},"work_around":[{"lang":"en","value":"Replace \"vxlan\" IP protocol match with match on IP protocol \"udp\" and Layer 4 destination port for VxLAN encapsulated packets i.e 4789. \nIf VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number."}]}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T21:47:32.630Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"}]}]},"cveMetadata":{"assignerOrgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","assignerShortName":"Arista","cveId":"CVE-2021-28504","datePublished":"2022-04-01T22:17:50.000Z","dateReserved":"2021-03-16T00:00:00.000Z","dateUpdated":"2024-08-03T21:47:32.630Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}