{ "containers": { "cna": { "affected": [ { "product": "Zoom Client for Meetings for Windows", "vendor": "Zoom Video Communications Inc", "versions": [ { "lessThan": "5.5.4", "status": "affected", "version": "unspecified", "versionType": "custom" } ] } ], "credits": [ { "lang": "en", "value": "Laurent Delosieres of ManoMano" } ], "datePublic": "2021-11-12T00:00:00.000Z", "descriptions": [ { "lang": "en", "value": "The Zoom Client for Meetings for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "description": "Improper Verification of Cryptographic Signature", "lang": "en", "type": "text" } ] } ], "providerMetadata": { "dateUpdated": "2021-12-02T18:20:33.000Z", "orgId": "99b9af0d-a833-4a5d-9e2f-8b1324f35351", "shortName": "Zoom" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://explore.zoom.us/en/trust/security/security-bulletin" }, { "tags": [ "x_refsource_MISC" ], "url": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e" } ], "source": { "discovery": "USER" }, "title": "Zoom Windows installation executable signature bypass", "x_legacyV4Record": { "CVE_data_meta": { "AKA": "Zoom Communications Inc", "ASSIGNER": "security@zoom.us", "DATE_PUBLIC": "2021-11-12T17:00:00.000Z", "ID": "CVE-2021-34420", "STATE": "PUBLIC", "TITLE": "Zoom Windows installation executable signature bypass" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Zoom Client for Meetings for Windows", "version": { "version_data": [ { "version_affected": "<", "version_value": "5.5.4" } ] } } ] }, "vendor_name": "Zoom Video Communications Inc" } ] } }, "credit": [ { "lang": "eng", "value": "Laurent Delosieres of ManoMano" } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "The Zoom Client for Meetings for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer." } ] }, "impact": { "cvss": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N", "version": "3.1" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "Improper Verification of Cryptographic Signature" } ] } ] }, "references": { "reference_data": [ { "name": "https://explore.zoom.us/en/trust/security/security-bulletin", "refsource": "MISC", "url": "https://explore.zoom.us/en/trust/security/security-bulletin" }, { "name": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e", "refsource": "MISC", "url": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e" } ] }, "source": { "discovery": "USER" } } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:12:50.184Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://explore.zoom.us/en/trust/security/security-bulletin" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e" } ] } ] }, "cveMetadata": { "assignerOrgId": "99b9af0d-a833-4a5d-9e2f-8b1324f35351", "assignerShortName": "Zoom", "cveId": "CVE-2021-34420", "datePublished": "2021-11-11T22:59:18.504Z", "dateReserved": "2021-06-09T00:00:00.000Z", "dateUpdated": "2024-09-16T21:03:43.509Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1" }