CVE-2019-6470

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There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lists for all repackagings of dhcpd that are vulnerable. In particular, builds from other vendors may also be affected. Operators are advised to consult their vendor documentation."}, {"lang": "es", "value": "Se hab\u00eda presentado en una de las bibliotecas ISC BIND un error en una funci\u00f3n que fue usada por dhcpd cuando operaba en modo DHCPv6. Tambi\u00e9n hubo un error en dhcpd relacionado con el uso de esta funci\u00f3n seg\u00fan su documentaci\u00f3n, pero el error en la funci\u00f3n library impide que esto causara alg\u00fan da\u00f1o. Todas las versiones de dhcpd de ISC contienen copias de esta y otras bibliotecas BIND en combinaciones que han sido probadas antes de su lanzamiento y se sabe que no presentan problemas como este. Algunos empaquetadores de terceros del software ISC de terceros han modificado la fuente dhcpd, la fuente BIND o la comparaci\u00f3n de versiones de manera que crean el potencial bloqueo. Seg\u00fan los reportes disponibles para ISC, la probabilidad de bloqueo es grande y no ha sido realizado ning\u00fan an\u00e1lisis sobre c\u00f3mo, o inclusive si, la probabilidad puede ser manipulada por parte un atacante. Afecta: Compilaciones de versiones de dhcpd anteriores a la versi\u00f3n 4.4.1 cuando se usan las versiones BIND 9.11.2 o posteriores, o versiones BIND con correcciones de bugs espec\u00edficas que respaldaron. ISC no tiene acceso a listas completas de versiones para todos los reempaques de dhcpd que son vulnerables. En particular, las compilaciones de otros proveedores tambi\u00e9n pueden estar afectadas. Es recomendado que los operadores consulten la documentaci\u00f3n de su proveedor."}], "id": "CVE-2019-6470", "lastModified": "2026-06-17T02:39:06.047", "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": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}, {"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"}]}, "published": "2019-11-01T23:15:10.510", "references": [{"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:2060"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:3525"}, {"source": "security-officer@isc.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122"}, {"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00048.html"}, {"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00049.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:2060"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:3525"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00048.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.opensuse.org/opensuse-security-announce/2019-10/msg00049.html"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2019:2060", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "dhcp-12:4.2.5-77.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-08-06T00:00:00Z"}, {"advisory": "RHSA-2019:3525", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "dhcp-12:4.3.6-34.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-11-05T00:00:00Z"}], "bugzilla": {"description": "dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS", "id": "1708641", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1708641"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lists for all repackagings of dhcpd that are vulnerable. In particular, builds from other vendors may also be affected. Operators are advised to consult their vendor documentation."], "name": "CVE-2019-6470", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "redhat-virtualization-host", "product_name": "Red Hat Virtualization 4"}], "public_date": "2018-07-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-6470\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-6470\nhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122"], "threat_severity": "Moderate"}

{}