cve-2021-28511
Vulnerability from cvelistv5
Published
2022-08-05 16:47
Modified
2024-09-16 17:15
Severity ?
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Summary
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.
References
psirt@arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078Exploit, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
Arista Networks EOS Version: 4.24.0   <
Version: 4.25.0   <
Version: 4.26.0   <
Version: 4.27.0   <
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Esto puede permitir una derivaci\u00f3n de la ACL\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}]},\"weaknesses\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"4.24.9\",\"matchCriteriaId\":\"BD53A1C6-B490-4176-B956-83B3AF856E07\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.25.0\",\"versionEndIncluding\":\"4.25.8\",\"matchCriteriaId\":\"E995C872-3638-45EC-A912-ECBEB2B61369\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.26.0\",\"versionEndIncluding\":\"4.26.5\",\"matchCriteriaId\":\"7C0F3258-2042-4BC5-B003-6406D8EF8291\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.27.0\",\"versionEndIncluding\":\"4.27.3\",\"matchCriteriaId\":\"4D71F445-AB45-43B2-8C37-A4C6169F2CED\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E1FF0290-C671-4ABC-8A12-05E4D55FC4AE\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"828C6E4F-814A-4060-8F5E-7FF359C8739C\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FE35C17F-0C60-4A40-9949-D4C5D94D1D7A\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050sx3-48yc:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07BA078E-30B7-4E2C-B240-BF64E98143E9\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050sx3-48yc12:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EBFD0706-CACB-40FA-A41B-46B39C6E1D33\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050sx3-48yc8:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5951D243-CB68-4B41-A913-D879CE502795\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050sx3-96yc8:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"73156612-D338-4E20-8C82-0E65DAA72331\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7050tx3-48c8:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"388C57D8-4B3C-4E5D-84AA-0CB7506F825A\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:720xp-24y6:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AFDBCBB-2C1A-4B88-AE28-EF63D5B9EDD2\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:720xp-24zy4:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"58757129-BF9C-4BD8-B692-BB57023F8A48\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:720xp-48y6:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2756BB4B-1053-4EAC-AC0B-785FD5039D5F\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:720xp-48zc2:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"40D36540-7723-4284-A207-6BD27728CA25\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:720xp-96zc2:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DF95CB28-E010-4A1D-A746-F9DDF015868F\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7300x3-32c:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0040BDDF-D711-4619-9E96-96EFBD33CAA0\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:arista:7300x3-48yc4:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D4AA716D-CAD1-4689-8A26-977A2E5F869E\"}]}]}],\"references\":[{\"url\":\"https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078\",\"source\":\"psirt@arista.com\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]}]}}"
  }
}


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