{
    "CVE_data_meta": {
        "ASSIGNER": "security-officer@isc.org",
        "DATE_PUBLIC": "2019-04-24T23:00:00.000Z",
        "ID": "CVE-2019-6468",
        "STATE": "PUBLIC",
        "TITLE": "BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is used"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "BIND 9 Supported Preview Edition",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_name": "BIND 9",
                                            "version_value": "9.10.5-S1 -> 9.11.5-S5"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "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": "In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.7"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.0"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "If nxdomain-redirect is enabled (via configuration) in a vulnerable BIND release, a malicious party can cause BIND to exit by deliberately triggering the bug."
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://kb.isc.org/docs/cve-2019-6468",
                "refsource": "CONFIRM",
                "url": "https://kb.isc.org/docs/cve-2019-6468"
            },
            {
                "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\nBIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers.\n\n+    BIND 9.11.5-S6\n+    BIND 9.11.6-S1\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."
        }
    ]
}