{"cve":{"cve_id":"CVE-2019-14870","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02783,"epss_percentile":0.84522,"epss_as_of":"2026-06-23","description":"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.","published_at":"2019-12-10T00:00:00Z","last_modified_at":null,"cvss_v3_score":5.4,"cvss_v3_vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-285"],"nvd_references":["https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870","https://usn.ubuntu.com/4217-1/","https://security.netapp.com/advisory/ntap-20191210-0002/","https://www.samba.org/samba/security/CVE-2019-14870.html","https://usn.ubuntu.com/4217-2/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/","https://www.synology.com/security/advisory/Synology_SA_19_40","http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/","https://security.gentoo.org/glsa/202003-52","https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html","https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html","https://security.netapp.com/advisory/ntap-20230216-0008/","https://security.gentoo.org/glsa/202310-06"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:12:12.571806Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"red-hat","vendor_name":"Red Hat","product_slug":"samba","product_name":"samba","version_start":"all versions 4.11.x before 4.11.3","version_start_inclusive":true,"version_end":"all versions 4.11.x before 4.11.3","version_end_inclusive":true,"cpe23_uri":"cve5:red-hat:samba:all versions 4.11.x before 4.11.3:all versions 4.11.x before 4.11.3"},{"vendor_slug":"red-hat","vendor_name":"Red Hat","product_slug":"samba","product_name":"samba","version_start":"all versions 4.10.x before 4.10.11","version_start_inclusive":true,"version_end":"all versions 4.10.x before 4.10.11","version_end_inclusive":true,"cpe23_uri":"cve5:red-hat:samba:all versions 4.10.x before 4.10.11:all versions 4.10.x before 4.10.11"},{"vendor_slug":"red-hat","vendor_name":"Red Hat","product_slug":"samba","product_name":"samba","version_start":"all versions 4.x.x before 4.9.17","version_start_inclusive":true,"version_end":"all versions 4.x.x before 4.9.17","version_end_inclusive":true,"cpe23_uri":"cve5:red-hat:samba:all versions 4.x.x before 4.9.17:all versions 4.x.x before 4.9.17"}],"exploit_refs":[],"news":[],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870","source_type":"MISC","tags":[]},{"url":"https://usn.ubuntu.com/4217-1/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20191210-0002/","source_type":"MISC","tags":[]},{"url":"https://www.samba.org/samba/security/CVE-2019-14870.html","source_type":"MISC","tags":[]},{"url":"https://usn.ubuntu.com/4217-2/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://www.synology.com/security/advisory/Synology_SA_19_40","source_type":"MISC","tags":[]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://security.gentoo.org/glsa/202003-52","source_type":"MISC","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://security.netapp.com/advisory/ntap-20230216-0008/","source_type":"MISC","tags":[]},{"url":"https://security.gentoo.org/glsa/202310-06","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2019-12-10T00:00:00Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"}]}