{
    "CVE_data_meta": {
        "ASSIGNER": "security-officer@isc.org",
        "DATE_PUBLIC": "2019-04-24T23:00:00.000Z",
        "ID": "CVE-2019-6467",
        "STATE": "PUBLIC",
        "TITLE": "An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "BIND 9",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_name": "BIND 9",
                                            "version_value": "BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch."
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "ISC"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "ISC would like to thank Quad9 for reporting this issue."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.7"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "An attacker who can deliberately trigger the condition on a server with a vulnerable configuration can cause BIND to exit, denying service to other clients."
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://kb.isc.org/docs/cve-2019-6467",
                "refsource": "CONFIRM",
                "url": "https://kb.isc.org/docs/cve-2019-6467"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://www.synology.com/security/advisory/Synology_SA_19_20",
                "url": "https://www.synology.com/security/advisory/Synology_SA_19_20"
            }
        ]
    },
    "solution": [
        {
            "lang": "eng",
            "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n+   BIND 9.12.4-P1\n+   BIND 9.14.1\n\n\n\n\n"
        }
    ],
    "source": {
        "discovery": "USER"
    },
    "work_around": [
        {
            "lang": "eng",
            "value": "Exploitation of this defect can be effectively prevented by disabling the nxdomain-redirect feature in the nameserver's configuration."
        }
    ]
}