CVE-2019-16866

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2019-11-11T02:06:40.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"tags": ["x_refsource_MISC"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2019-16866", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog", "refsource": "MISC", "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"name": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt", "refsource": "MISC", "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "refsource": "BUGTRAQ", "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T01:24:48.569Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2019-16866", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-08T21:00:49.693604Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-08T21:03:28.346Z"}}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2019-16866", "datePublished": "2019-10-03T18:53:33.000Z", "dateReserved": "2019-09-25T00:00:00.000Z", "dateUpdated": "2026-10-08T21:03:28.346Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2019-11-11T02:06:40.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"tags": ["x_refsource_MISC"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2019-16866", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog", "refsource": "MISC", "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"name": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt", "refsource": "MISC", "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "refsource": "BUGTRAQ", "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T01:24:48.569Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"name": "USN-4149-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4149-1/"}, {"name": "DSA-4544", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2019/dsa-4544"}, {"name": "20191016 [SECURITY] [DSA 4544-1] unbound security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"name": "FEDORA-2019-e99b716a92", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"name": "FEDORA-2019-0418c12a36", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2019-16866", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-08T21:00:49.693604Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-08T21:00:50.595Z"}, "title": "CISA ADP Vulnrichment"}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2019-16866", "datePublished": "2019-10-03T18:53:33.000Z", "dateReserved": "2019-09-25T00:00:00.000Z", "dateUpdated": "2026-10-08T21:03:28.346Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*", "matchCriteriaId": "E9749EA7-25CA-48B0-9165-94D0B461D810", "versionEndExcluding": "1.9.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*", "matchCriteriaId": "CD783B0C-9246-47D9-A937-6144FE8BFF0F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."}, {"lang": "es", "value": "Unbound versiones anteriores a 1.9.4, accede a la memoria no inicializada, lo que permite a atacantes remotos desencadenar un bloqueo por medio de una consulta NOTIFY dise\u00f1ada. La direcci\u00f3n IP del origen de la consulta debe coincidir con una regla de control de acceso."}], "id": "CVE-2019-16866", "lastModified": "2026-10-08T21:17:16.327", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2019-16866", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-08T21:00:49.693604Z", "version": "2.0.3"}}]}, "published": "2019-10-03T19:15:09.550", "references": [{"source": "cve@mitre.org", "tags": ["Product", "Release Notes"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"source": "cve@mitre.org", "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4149-1/"}, {"source": "cve@mitre.org", "url": "https://www.debian.org/security/2019/dsa-4544"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Release Notes"], "url": "https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://seclists.org/bugtraq/2019/Oct/23"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4149-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2019/dsa-4544"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}, {"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "unbound: uninitialized memory accesses leads to crash via a crafted NOTIFY query", "id": "1767955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1767955"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-822", "details": ["Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."], "name": "CVE-2019-16866", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2019-10-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-16866\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-16866\nhttps://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"], "statement": "This issue has been classified as having low security impact because:\n- per default, unbound is not configured to listen on a public interface\n- per default, the ACL is limited to localhost, so even if listening to a public interface, the crash cannot happen per default\nIt mostly affects people running unbound as a \"public\" DNS resolver. Using such configurations, unbound has no valuable secrets that could be obtained by a successful attack, so at best the server crashes and restarts, resulting in an empty DNS cache. Sustained sending of packets would result in a DoS though.", "threat_severity": "Low"}

{}