ghsa-3r9x-25h6-9v89
Vulnerability from github
Published
2022-05-24 19:01
Modified
2022-05-24 19:01
Details

A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-20254"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-05T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.",
  "id": "GHSA-3r9x-25h6-9v89",
  "modified": "2022-05-24T19:01:24Z",
  "published": "2022-05-24T19:01:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20254"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1949442"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3EP2VJ73OVBPVSOSTVOMGIEQA3MWF6F7"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZAF6L2M6CNAJ2YYYGXPWETTW5YLCWTVT"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202105-22"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210430-0001"
    },
    {
      "type": "WEB",
      "url": "https://www.samba.org/samba/security/CVE-2021-20254.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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