gsd-2021-20254
Vulnerability from gsd
Modified
2023-12-13 01:23
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.
Aliases
Aliases
CVE-2021-20254


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-20254",
    "description": "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": "GSD-2021-20254",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-20254.html",
      "https://access.redhat.com/errata/RHSA-2021:4866",
      "https://access.redhat.com/errata/RHSA-2021:4058",
      "https://access.redhat.com/errata/RHSA-2021:3988",
      "https://access.redhat.com/errata/RHSA-2021:3724",
      "https://access.redhat.com/errata/RHSA-2021:3723",
      "https://access.redhat.com/errata/RHSA-2021:2313",
      "https://ubuntu.com/security/CVE-2021-20254",
      "https://advisories.mageia.org/CVE-2021-20254.html",
      "https://security.archlinux.org/CVE-2021-20254",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-20254.html",
      "https://linux.oracle.com/cve/CVE-2021-20254.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-20254"
      ],
      "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": "GSD-2021-20254",
      "modified": "2023-12-13T01:23:12.383968Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2021-20254",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
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                  {
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                    "version": {
                      "version_data": [
                        {
                          "version_value": "samba 4.14.1, samba 4.13.6, samba 4.12.13"
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              "vendor_name": "n/a"
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          }
        ]
      },
      "problemtype": {
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          },
          {
            "name": "https://www.samba.org/samba/security/CVE-2021-20254.html",
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          },
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          },
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    },
    "nvd.nist.gov": {
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              },
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          },
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              },
              {
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          {
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        ]
      },
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            }
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            },
            {
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            },
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 6.8,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 1.6,
          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2021-06-24T18:30Z",
      "publishedDate": "2021-05-05T14:15Z"
    }
  }
}


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