{"id":"CVE-2019-14870","details":"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.","modified":"2026-05-15T12:03:42.652199325Z","published":"2019-12-10T23:15:10.457Z","related":["SUSE-SU-2019:3318-1","SUSE-SU-2019:3319-1","SUSE-SU-2020:2673-1","openSUSE-SU-2019:2700-1","openSUSE-SU-2023:0019-1","openSUSE-SU-2023:0020-1","openSUSE-SU-2024:11365-1","openSUSE-SU-2024:12580-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"14.04"},{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"19.04"},{"last_affected":"19.10"}],"vendor_product":"canonical:ubuntu_linux"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"9.0"},{"last_affected":"10.0"}],"vendor_product":"debian:debian_linux"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"30"},{"last_affected":"31"}],"vendor_product":"fedoraproject:fedora"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"15.1"}],"vendor_product":"opensuse:leap"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-52"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202310-06"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20191210-0002/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230216-0008/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4217-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4217-2/"},{"type":"ADVISORY","url":"https://www.samba.org/samba/security/CVE-2019-14870.html"},{"type":"ADVISORY","url":"https://www.synology.com/security/advisory/Synology_SA_19_40"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}