{
  "GSD": {
    "affected_component": " VFS module vfs_fruit",
    "alias": "CVE-2021-44142",
    "attack_vector": "network access",
    "description": "To quote the Samba advisory: \n\n All versions of Samba prior to 4.13.17 are vulnerable to an out-of-bounds heap read write vulnerability that allows remote attackers to execute arbitrary code as root on affected Samba installations that use the VFS module vfs_fruit. \n\n The specific flaw exists within the parsing of EA metadata when opening files in smbd. Access as a user that has write access to a file\u0027s extended attributes is required to exploit this vulnerability. Note that this could be a guest or unauthenticated user if such users are allowed write access to file extended attributes. \n\n The problem in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file. If both options are set to different settings than the default values, the system is not affected by the security issue.",
    "id": "GSD-2021-44142",
    "impact": "code execution as root",
    "notes": "",
    "product_name": "Samba",
    "product_version": "\u003c4.13.17",
    "references": [
      "https://www.samba.org/samba/security/CVE-2021-44142.html",
      "https://access.redhat.com/security/cve/cve-2021-44142",
      "https://ubuntu.com/security/CVE-2021-44142",
      "https://ubuntu.com/security/notices/USN-5260-1",
      "https://ubuntu.com/security/notices/USN-5260-2",
      "https://www.synology.com/en-us/security/advisory/Synology_SA_22_02",
      "https://support.f5.com/csp/article/K84695749",
      "https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin",
      "https://www.whitesourcesoftware.com/resources/blog/samba-vulnerability-cve-2021-44142/",
      "https://www.theregister.com/2022/02/02/samba_vfs_fruit_vulnerability/",
      "https://www.suse.com/security/cve/CVE-2021-44142.html",
      "https://www.debian.org/security/2022/dsa-5071",
      "https://access.redhat.com/errata/RHSA-2022:0664",
      "https://access.redhat.com/errata/RHSA-2022:0663",
      "https://access.redhat.com/errata/RHSA-2022:0458",
      "https://access.redhat.com/errata/RHSA-2022:0457",
      "https://access.redhat.com/errata/RHSA-2022:0332",
      "https://access.redhat.com/errata/RHSA-2022:0331",
      "https://access.redhat.com/errata/RHSA-2022:0330",
      "https://access.redhat.com/errata/RHSA-2022:0329",
      "https://access.redhat.com/errata/RHSA-2022:0328",
      "https://advisories.mageia.org/CVE-2021-44142.html",
      "https://security.archlinux.org/CVE-2021-44142",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-44142.html",
      "https://linux.oracle.com/cve/CVE-2021-44142.html"
    ],
    "reporter": "kurtseifried",
    "reporter_id": 582211,
    "vendor_name": "Samba",
    "vulnerability_type": "out-of-bounds heap read write"
  },
  "OSV": {
    "affected": [
      {
        "package": {
          "ecosystem": "GSD",
          "name": "Samba"
        },
        "versions": [
          "\u003c4.13.17"
        ]
      }
    ],
    "alias": "CVE-2021-44142",
    "details": "To quote the Samba advisory: \n\n All versions of Samba prior to 4.13.17 are vulnerable to an out-of-bounds heap read write vulnerability that allows remote attackers to execute arbitrary code as root on affected Samba installations that use the VFS module vfs_fruit. \n\n The specific flaw exists within the parsing of EA metadata when opening files in smbd. Access as a user that has write access to a file\u0027s extended attributes is required to exploit this vulnerability. Note that this could be a guest or unauthenticated user if such users are allowed write access to file extended attributes. \n\n The problem in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file. If both options are set to different settings than the default values, the system is not affected by the security issue.",
    "id": "GSD-2021-44142",
    "modified": "2022-02-01T23:00:11.123456Z",
    "published": "2022-02-01T23:00:11.123456Z",
    "references": [
      {
        "type": "VENDOR",
        "url": "https://www.samba.org/samba/security/CVE-2021-44142.html"
      },
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        "type": "VENDOR",
        "url": "https://access.redhat.com/security/cve/cve-2021-44142"
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        "url": "https://ubuntu.com/security/CVE-2021-44142"
      },
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        "url": "https://ubuntu.com/security/notices/USN-5260-1"
      },
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        "type": "VENDOR",
        "url": "https://ubuntu.com/security/notices/USN-5260-2"
      },
      {
        "type": "VENDOR",
        "url": "https://www.synology.com/en-us/security/advisory/Synology_SA_22_02"
      },
      {
        "type": "VENDOR",
        "url": "https://support.f5.com/csp/article/K84695749"
      },
      {
        "type": "WEB",
        "url": "https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin"
      },
      {
        "type": "WEB",
        "url": "https://www.whitesourcesoftware.com/resources/blog/samba-vulnerability-cve-2021-44142/"
      },
      {
        "type": "WEB",
        "url": "https://www.theregister.com/2022/02/02/samba_vfs_fruit_vulnerability/"
      }
    ],
    "summary": "Remote code execution as root in Samba prior to version 4.13.17"
  },
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    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
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            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-09-17T09:15Z",
      "publishedDate": "2022-02-21T15:15Z"
    }
  }
}

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2021-44142 The Samba vfs_fruit module uses extended file attributes (EA xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd typically root. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-44142.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "The Samba vfs_fruit module uses extended file attributes (EA xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd typically root.",
    "tracking": {
      "current_release_date": "2024-10-15T00:00:00.000Z",
      "generator": {
        "date": "2025-12-27T18:08:48.039Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-44142",
      "initial_release_date": "2022-02-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2024-10-15T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cazl3 samba 4.18.3-1",
                "product": {
                  "name": "\u003cazl3 samba 4.18.3-1",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 samba 4.18.3-1",
                "product": {
                  "name": "azl3 samba 4.18.3-1",
                  "product_id": "16864"
                }
              }
            ],
            "category": "product_name",
            "name": "samba"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003cazl3 samba 4.18.3-1 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 samba 4.18.3-1 as a component of Azure Linux 3.0",
          "product_id": "16864-17084"
        },
        "product_reference": "16864",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-44142",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "16864-17084"
        ],
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-44142 The Samba vfs_fruit module uses extended file attributes (EA xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd typically root. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-44142.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-10-15T00:00:00.000Z",
          "details": "4.18.3-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17084-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 8.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "17084-1"
          ]
        }
      ],
      "title": "The Samba vfs_fruit module uses extended file attributes (EA xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd typically root."
    }
  ]
}