ghsa-6q5r-wx7g-rq28
Vulnerability from github
Published
2022-05-24 17:03
Modified
2022-11-27 00:30
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
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.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-14870"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285",
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-12-10T23:15:00Z",
    "severity": "MODERATE"
  },
  "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.",
  "id": "GHSA-6q5r-wx7g-rq28",
  "modified": "2022-11-27T00:30:50Z",
  "published": "2022-05-24T17:03:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14870"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202003-52"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202310-06"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20191210-0002"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230216-0008"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4217-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4217-2"
    },
    {
      "type": "WEB",
      "url": "https://www.samba.org/samba/security/CVE-2019-14870.html"
    },
    {
      "type": "WEB",
      "url": "https://www.synology.com/security/advisory/Synology_SA_19_40"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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