{
    "data_type": "CVE",
    "data_format": "MITRE",
    "data_version": "4.0",
    "CVE_data_meta": {
        "ID": "CVE-2020-6820",
        "ASSIGNER": "security@mozilla.org",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Mozilla",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Thunderbird",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "68.7.0",
                                            "version_affected": "<"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Firefox",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "74.0.1",
                                            "version_affected": "<"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Firefox ESR",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "68.6.1",
                                            "version_affected": "<"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Use-after-free when handling a ReadableStream"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://www.mozilla.org/security/advisories/mfsa2020-14/",
                "refsource": "MISC",
                "name": "https://www.mozilla.org/security/advisories/mfsa2020-14/"
            },
            {
                "url": "https://www.mozilla.org/security/advisories/mfsa2020-11/",
                "refsource": "MISC",
                "name": "https://www.mozilla.org/security/advisories/mfsa2020-11/"
            },
            {
                "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1626728",
                "refsource": "MISC",
                "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1626728"
            },
            {
                "refsource": "UBUNTU",
                "name": "USN-4335-1",
                "url": "https://usn.ubuntu.com/4335-1/"
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1."
            }
        ]
    }
}