Security advisory

{
  "id": "d1d57c9924d5115918cf2a568404e0efddde719f302b9e6b55314ecc0bfa87f0",
  "url": "https://osv.dev/vulnerability/CVE-2020-17049",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-17049",
    "summary": "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). To 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. The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.",
    "evidence": "osv:CVE-2020-17049",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-17049",
      "aliases": [
        "CVE-2020-17049"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/samba-team/samba",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a6fb418be7adccdd583a3b489b58023cfdd392ef"
                },
                {
                  "fixed": "88d73d0b4eeabc2544e48a8301b1caa0e9aaeccd"
                },
                {
                  "introduced": "9b49519cae3e967af9ea48dc5fcfb6c145e31db4"
                },
                {
                  "fixed": "c1bd376c357425c6f23c18126218623f5ce51551"
                },
                {
                  "introduced": "fc8342bd26d1c55ca5780b427f675f31147b27f9"
                },
                {
                  "fixed": "5850ae94ba6dc90850772084a8d7c3d60b01dbd2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.1.0"
                      },
                      {
                        "fixed": "4.13.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.14.0"
                      },
                      {
                        "fixed": "4.14.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "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"
          }
        }
      ],
      "modified": "2026-10-24T10:30:23.800878310Z",
      "provider": "osv",
      "references": [
        "https://security.gentoo.org/glsa/202309-06",
        "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:windows_server_2012",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "r2"
                  },
                  {
                    "last_affected": "r2"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "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:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:windows_server_2016",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "20h2"
                  },
                  {
                    "last_affected": "20h2"
                  },
                  {
                    "introduced": "1903"
                  },
                  {
                    "last_affected": "1903"
                  },
                  {
                    "introduced": "1909"
                  },
                  {
                    "last_affected": "1909"
                  },
                  {
                    "introduced": "2004"
                  },
                  {
                    "last_affected": "2004"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-17049",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431010,
  "published_at": "2020-11-11T07:15:16.543+00:00"
}