CVE-2021-28511

{"id": "CVE-2021-28511", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "psirt@arista.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2022-08-05T17:15:07.957", "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "psirt@arista.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}, {"type": "Secondary", "source": "psirt@arista.com", "description": [{"lang": "en", "value": "CWE-284"}]}], "descriptions": [{"lang": "en", "value": "This advisory documents the impact of an internally found vulnerability in Arista EOS for security ACL bypass. The impact of this vulnerability is that the security ACL drop rule might be bypassed if a NAT ACL rule filter with permit action matches the packet flow. This could allow a host with an IP address in a range that matches the range allowed by a NAT ACL and a range denied by a Security ACL to be forwarded incorrectly as it should have been denied by the Security ACL. This can enable an ACL bypass."}, {"lang": "es", "value": "Este aviso documenta el impacto de una vulnerabilidad encontrada internamente en Arista EOS para omitir las ACL de seguridad. El impacto de esta vulnerabilidad es que la regla de ca\u00edda de la ACL de seguridad podr\u00eda omitirse si un filtro de regla ACL de NAT con acci\u00f3n de permiso coincide con el flujo de paquetes. Esto podr\u00eda permitir que un host con una direcci\u00f3n IP en un rango que coincida con el rango permitido por una ACL de NAT y un rango denegado por una ACL de seguridad sea reenviado incorrectamente ya que deber\u00eda haber sido denegado por la ACL de seguridad. Esto puede permitir una derivaci\u00f3n de la ACL"}], "lastModified": "2022-08-15T20:50:20.520", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BD53A1C6-B490-4176-B956-83B3AF856E07", "versionEndIncluding": "4.24.9"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E995C872-3638-45EC-A912-ECBEB2B61369", "versionEndIncluding": "4.25.8", "versionStartIncluding": "4.25.0"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C0F3258-2042-4BC5-B003-6406D8EF8291", "versionEndIncluding": "4.26.5", "versionStartIncluding": "4.26.0"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D71F445-AB45-43B2-8C37-A4C6169F2CED", "versionEndIncluding": "4.27.3", "versionStartIncluding": "4.27.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "E1FF0290-C671-4ABC-8A12-05E4D55FC4AE"}, {"criteria": "cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "828C6E4F-814A-4060-8F5E-7FF359C8739C"}, {"criteria": "cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "FE35C17F-0C60-4A40-9949-D4C5D94D1D7A"}, {"criteria": "cpe:2.3:h:arista:7050sx3-48yc:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "07BA078E-30B7-4E2C-B240-BF64E98143E9"}, {"criteria": "cpe:2.3:h:arista:7050sx3-48yc12:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "EBFD0706-CACB-40FA-A41B-46B39C6E1D33"}, {"criteria": "cpe:2.3:h:arista:7050sx3-48yc8:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5951D243-CB68-4B41-A913-D879CE502795"}, {"criteria": "cpe:2.3:h:arista:7050sx3-96yc8:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "73156612-D338-4E20-8C82-0E65DAA72331"}, {"criteria": "cpe:2.3:h:arista:7050tx3-48c8:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "388C57D8-4B3C-4E5D-84AA-0CB7506F825A"}, {"criteria": "cpe:2.3:h:arista:720xp-24y6:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7AFDBCBB-2C1A-4B88-AE28-EF63D5B9EDD2"}, {"criteria": "cpe:2.3:h:arista:720xp-24zy4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "58757129-BF9C-4BD8-B692-BB57023F8A48"}, {"criteria": "cpe:2.3:h:arista:720xp-48y6:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2756BB4B-1053-4EAC-AC0B-785FD5039D5F"}, {"criteria": "cpe:2.3:h:arista:720xp-48zc2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "40D36540-7723-4284-A207-6BD27728CA25"}, {"criteria": "cpe:2.3:h:arista:720xp-96zc2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DF95CB28-E010-4A1D-A746-F9DDF015868F"}, {"criteria": "cpe:2.3:h:arista:7300x3-32c:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "0040BDDF-D711-4619-9E96-96EFBD33CAA0"}, {"criteria": "cpe:2.3:h:arista:7300x3-48yc4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D4AA716D-CAD1-4689-8A26-977A2E5F869E"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "psirt@arista.com"}