cvelist/2020/8xxx/CVE-2020-8620.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-officer@isc.org",
        "DATE_PUBLIC": "2020-08-20T18:35:08.000Z",
        "ID": "CVE-2020-8620",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "BIND9",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": ">=",
                                            "version_name": "",
                                            "version_value": "9.15.6"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "",
                                            "version_value": "9.16.6"
                                        },
                                        {
                                            "version_affected": ">=",
                                            "version_name": "",
                                            "version_value": "9.17.0"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "",
                                            "version_value": "9.17.4"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "ISC"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "ISC would like to thank Emanuel Almeida of Cisco Systems, Inc. for bringing this vulnerability to our attention."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit."
            }
        ]
    },
    "exploit": [
        {
            "lang": "eng",
            "value": "We are not aware of any active exploits."
        }
    ],
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "  In versions of BIND that use the libuv network manager (9.16.x is the only stable branch affected) an incorrectly specified maximum buffer size allows a specially crafted large TCP payload to trigger an assertion failure when it is received.  Affects BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://kb.isc.org/docs/cve-2020-8620",
                "refsource": "CONFIRM",
                "url": "https://kb.isc.org/docs/cve-2020-8620"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20200827-0003/",
                "url": "https://security.netapp.com/advisory/ntap-20200827-0003/"
            },
            {
                "refsource": "UBUNTU",
                "name": "USN-4468-1",
                "url": "https://usn.ubuntu.com/4468-1/"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202008-19",
                "url": "https://security.gentoo.org/glsa/202008-19"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://www.synology.com/security/advisory/Synology_SA_20_19",
                "url": "https://www.synology.com/security/advisory/Synology_SA_20_19"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2020:1699",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2020:1701",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html"
            }
        ]
    },
    "solution": [
        {
            "lang": "eng",
            "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n    BIND 9.16.6\n    BIND 9.17.4\n"
        }
    ],
    "source": {
        "defect": [
            "A",
            "specially",
            "crafted",
            "large",
            "TCP",
            "payload",
            "can",
            "trigger",
            "an",
            "assertion",
            "failure",
            "in",
            "tcpdns.c"
        ],
        "discovery": "EXTERNAL"
    },
    "work_around": [
        {
            "lang": "eng",
            "value": "No workarounds known."
        }
    ]
}