{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2019-14870", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "dateUpdated": "2023-10-08T08:06:43.843846", "dateReserved": "2019-08-10T00:00:00", "datePublished": "2019-12-10T00:00:00"}, "containers": {"cna": {"providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2023-10-08T08:06:43.843846"}, "descriptions": [{"lang": "en", "value": "All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set."}], "affected": [{"vendor": "Red Hat", "product": "samba", "versions": [{"version": "all versions 4.11.x before 4.11.3", "status": "affected"}, {"version": "all versions 4.10.x before 4.10.11", "status": "affected"}, {"version": "all versions 4.x.x before 4.9.17", "status": "affected"}]}], "references": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870"}, {"name": "USN-4217-1", "tags": ["vendor-advisory"], "url": "https://usn.ubuntu.com/4217-1/"}, {"url": "https://security.netapp.com/advisory/ntap-20191210-0002/"}, {"url": "https://www.samba.org/samba/security/CVE-2019-14870.html"}, {"name": "USN-4217-2", "tags": ["vendor-advisory"], "url": "https://usn.ubuntu.com/4217-2/"}, {"name": "FEDORA-2019-be98a08835", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_19_40"}, {"name": "openSUSE-SU-2019:2700", "tags": ["vendor-advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html"}, {"name": "FEDORA-2019-11dddb785b", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/"}, {"name": "GLSA-202003-52", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202003-52"}, {"name": "[debian-lts-announce] 20210529 [SECURITY] [DLA 2668-1] samba security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html"}, {"name": "[debian-lts-announce] 20221126 [SECURITY] [DLA 3206-1] heimdal security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"}, {"url": "https://security.netapp.com/advisory/ntap-20230216-0008/"}, {"name": "GLSA-202310-06", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202310-06"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-285", "cweId": "CWE-285"}]}]}}}

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In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set."}, {"lang": "es", "value": "Todas las versiones de Samba 4.xx anteriores a 4.9.17, versiones 4.10.x anteriores a 4.10.11 y versiones 4.11.x anteriores a 4.11.3, presentan un problema, donde el modelo de delegaci\u00f3n de Kerberos S4U (MS-SFU) incluye una funcionalidad que permite a un subconjunto de clientes ser excluidos de la delegaci\u00f3n restringida de cualquier manera, ya sea S4U2Self o autenticaci\u00f3n Kerberos regular, al forzar que todos los tickets para estos clientes no sean reenviables. En AD, esto es implementado mediante un atributo de usuario delegation_not_allowed (tambi\u00e9n se conoce como no delegado), que se traduce como no permitido-reenviable. Sin embargo, el AD DC Samba no hace eso para S4U2Self y establece el flag reenviable inclusive si el cliente suplantado tiene el conjunto de flags no delegados."}], "id": "CVE-2019-14870", "lastModified": "2023-11-07T03:05:21.010", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 6.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "secalert@redhat.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-12-10T23:15:10.457", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202003-52"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/202310-06"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20191210-0002/"}, {"source": "secalert@redhat.com", "url": "https://security.netapp.com/advisory/ntap-20230216-0008/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4217-1/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4217-2/"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://www.samba.org/samba/security/CVE-2019-14870.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_19_40"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-285"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

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