{ "containers": { "cna": { "affected": [ { "product": "EOS", "vendor": "Arista Networks", "versions": [ { "lessThanOrEqual": "4.26.0", "status": "affected", "version": "4.26.3M", "versionType": "custom" }, { "lessThanOrEqual": "4.27.0", "status": "affected", "version": "4.27.0F", "versionType": "custom" } ] } ], "datePublic": "2022-03-29T00:00:00.000Z", "descriptions": [ { "lang": "en", "value": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol." } ], "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": "2022-04-14T20:05:50.000Z", "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.\nArtista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28505 has been fixed in the following releases:\n\n4.26.4M and later releases in the 4.26.x train\n4.27.1F and later releases in the 4.27.x train" } ], "source": { "advisory": "73", "defect": [ "BUG", "609752" ], "discovery": "INTERNAL" }, "title": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.", "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. < br/> If VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number." } ], "x_generator": { "engine": "Vulnogram 0.0.9" }, "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "psirt@arista.com", "DATE_PUBLIC": "2022-03-29T21:53:00.000Z", "ID": "CVE-2021-28505", "STATE": "PUBLIC", "TITLE": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol." }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "EOS", "version": { "version_data": [ { "version_affected": "<=", "version_name": "4.26.3M", "version_value": "4.26.0" }, { "version_affected": "<=", "version_name": "4.27.0F", "version_value": "4.27.0" } ] } } ] }, "vendor_name": "Arista Networks" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol." } ] }, "generator": { "engine": "Vulnogram 0.0.9" }, "impact": { "cvss": { "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" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-284 Improper Access Control" } ] } ] }, "references": { "reference_data": [ { "name": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073", "refsource": "MISC", "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073" } ] }, "solution": [ { "lang": "en", "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience.\nArtista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28505 has been fixed in the following releases:\n\n4.26.4M and later releases in the 4.26.x train\n4.27.1F and later releases in the 4.27.x train" } ], "source": { "advisory": "73", "defect": [ "BUG", "609752" ], "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. < br/> If 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": "2024-08-03T21:47:32.647Z" }, "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-2021-28505", "datePublished": "2022-04-14T20:05:50.059Z", "dateReserved": "2021-03-16T00:00:00.000Z", "dateUpdated": "2024-09-16T16:58:06.559Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1" }