{"schema_version":"1.7.5","id":"CVE-2020-17049","published":"2020-11-11T07:15:16.543Z","modified":"2026-07-08T05:58:39.334830410Z","related":["ALSA-2023:2570","ALSA-2024:0143","SUSE-SU-2022:0361-1","openSUSE-SU-2024:11631-1","openSUSE-SU-2024:13200-1"],"details":"A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD).\nTo exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it.\nThe update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/samba-team/samba","events":[{"introduced":"a6fb418be7adccdd583a3b489b58023cfdd392ef"},{"fixed":"88d73d0b4eeabc2544e48a8301b1caa0e9aaeccd"},{"introduced":"9b49519cae3e967af9ea48dc5fcfb6c145e31db4"},{"fixed":"c1bd376c357425c6f23c18126218623f5ce51551"},{"introduced":"fc8342bd26d1c55ca5780b427f675f31147b27f9"},{"fixed":"5850ae94ba6dc90850772084a8d7c3d60b01dbd2"}],"database_specific":{"cpe":"cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.1.0"},{"fixed":"4.13.13"},{"introduced":"4.14.0"},{"fixed":"4.14.9"},{"introduced":"4.15.0"},{"fixed":"4.15.1"}],"source":"CPE_RANGE"}}],"versions":["ldb-2.4.1","ldb-2.3.1","samba-4.14.8","samba-4.15.0","samba-4.14.7","samba-4.14.6","samba-4.14.5","samba-4.14.3","samba-4.14.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-17049.json"}}],"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/11/10/3"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202309-06"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"r2"},{"last_affected":"r2"}],"source":"CPE_STRING","vendor_product":"microsoft:windows_server_2012"},{"cpes":["cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:*","cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*","cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*","cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"20h2"},{"last_affected":"20h2"},{"introduced":"1903"},{"last_affected":"1903"},{"introduced":"1909"},{"last_affected":"1909"},{"introduced":"2004"},{"last_affected":"2004"}],"source":"CPE_STRING","vendor_product":"microsoft:windows_server_2016"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}