{
    "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\u2019s 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": [
            {
                "refsource": "MISC",
                "url": "https://explore.zoom.us/en/trust/security/security-bulletin",
                "name": "https://explore.zoom.us/en/trust/security/security-bulletin"
            },
            {
                "refsource": "MISC",
                "url": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e",
                "name": "https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e"
            }
        ]
    },
    "source": {
        "discovery": "USER"
    }
}