{"id":"CVE-2021-28495","state":"PUBLISHED","title":"In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is e","description":"In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train","publishedAt":"2021-09-09T12:43:57.000Z","updatedAt":"2024-08-03T21:47:32.686Z","severity":{"score":7.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L","source":"Arista"},"assigner":"Arista","products":["Arista Metamako Operating System"],"affected":[{"vendor":"Arista","product":"Metamako Operating System","versions":[{"version":"MOS-0.13","status":"affected","lessThan":"MOS-0.13*","versionType":"custom"},{"version":"MOS-0.26.7","status":"affected","lessThan":"MOS-0.26.7","versionType":"custom"},{"version":"MOS-0.32.0","status":"affected","lessThan":"MOS-0.32.0","versionType":"custom"}],"platforms":["Arista 7130 Systems running MOS"]}],"references":["https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T19:48:19.096Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/28xxx/CVE-2021-28495.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-28495","state":"PUBLISHED","datePublished":"2021-09-09T12:43:57.000Z","dateUpdated":"2024-08-03T21:47:32.686Z","assignerShortName":"Arista","assignerOrgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7","dateReserved":"2021-03-16T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train"}],"affected":[{"vendor":"Arista","product":"Metamako Operating System","versions":[{"version":"MOS-0.13","status":"affected","lessThan":"MOS-0.13*","versionType":"custom"},{"version":"MOS-0.26.7","status":"affected","lessThan":"MOS-0.26.7","versionType":"custom"},{"version":"MOS-0.32.0","status":"affected","lessThan":"MOS-0.32.0","versionType":"custom"}],"platforms":["Arista 7130 Systems running MOS"]}],"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","description":"CWE-287 Improper Authentication","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"Arista","dateUpdated":"2021-09-09T12:43:57.000Z","orgId":"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7"},"solutions":[{"lang":"en","value":"Upgrade to MOS-0.26.7 or MOS-0.32.0"},{"lang":"en","value":"Install hotfix stored at https://www.arista.com/assets/data/SecurityAdvisories/SA64-67/SecurityAdvisory64-67-Hotfix-mos-1818-2.0.0-1.11.core2_64.rpm\nFor detailed information about hotfix installation, please see the advisory https://www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64"}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"psirt@arista.com","ID":"CVE-2021-28495","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Metamako Operating System","version":{"version_data":[{"platform":"Arista 7130 Systems running MOS","version_affected":">=","version_name":"MOS-0.13","version_value":"MOS-0.13"},{"platform":"Arista 7130 Systems running MOS","version_affected":"<","version_name":"MOS-0.26.7","version_value":"MOS-0.26.7"},{"platform":"Arista 7130 Systems running MOS","version_affected":"<","version_name":"MOS-0.32.0","version_value":"MOS-0.32.0"}]}}]},"vendor_name":"Arista"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. 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