{
  "document": {
    "aggregate_severity": {
      "text": "High"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/centos8.4els/vex/2021/cve-2021-37712-els_os-centos8_4els.json"
      }
    ],
    "title": "Security update on CVE-2021-37712",
    "tracking": {
      "current_release_date": "2025-12-23T22:15:38Z",
      "generator": {
        "date": "2025-12-23T22:15:38Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-37712-ELS_OS-CENTOS8.4ELS",
      "initial_release_date": "2021-08-31T17:15:00Z",
      "revision_history": [
        {
          "date": "2021-08-31T17:15:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2025-11-29T11:02:59Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2025-12-23T22:15:38Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Community Enterprise Operating System 8.4",
                "product": {
                  "name": "Community Enterprise Operating System 8.4",
                  "product_id": "CentOS-8.4",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:centos:centos:8.4:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Community Enterprise Operating System"
          }
        ],
        "category": "vendor",
        "name": "Red Hat, Inc."
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "tar-2:1.30-5.el8.tuxcare.els2.x86_64",
                "product": {
                  "name": "tar-2:1.30-5.el8.tuxcare.els2.x86_64",
                  "product_id": "tar-2:1.30-5.el8.tuxcare.els2.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/tar@1.30-5.el8.tuxcare.els2?arch=x86_64&epoch=2"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "tar-2:1.30-5.el8.tuxcare.els1.x86_64",
                "product": {
                  "name": "tar-2:1.30-5.el8.tuxcare.els1.x86_64",
                  "product_id": "tar-2:1.30-5.el8.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/tar@1.30-5.el8.tuxcare.els1?arch=x86_64&epoch=2"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "CloudLinux"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "tar-2:1.30-5.el8.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 8.4",
          "product_id": "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els2.x86_64"
        },
        "product_reference": "tar-2:1.30-5.el8.tuxcare.els2.x86_64",
        "relates_to_product_reference": "CentOS-8.4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "tar-2:1.30-5.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8.4",
          "product_id": "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els1.x86_64"
        },
        "product_reference": "tar-2:1.30-5.el8.tuxcare.els1.x86_64",
        "relates_to_product_reference": "CentOS-8.4"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-37712",
      "cwe": {
        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
      },
      "notes": [
        {
          "category": "description",
          "text": "The npm package \"tar\" (aka node-tar) before versions 4.4.18, 5.0.10, and 6.1.9 has an arbitrary file creation/overwrite and arbitrary code execution vulnerability. node-tar aims to guarantee that any file whose location would be modified by a symbolic link is not extracted. This is, in part, achieved by ensuring that extracted directories are not symlinks. Additionally, in order to prevent unnecessary stat calls to determine whether a given path is a directory, paths are cached when directories are created. This logic was insufficient when extracting tar files that contained both a directory and a symlink with names containing unicode values that normalized to the same value. Additionally, on Windows systems, long path portions would resolve to the same file system entities as their 8.3 \"short path\" counterparts. A specially crafted tar archive could thus include a directory with one form of the path, followed by a symbolic link with a different string that resolves to the same file system entity, followed by a file using the first form. By first creating a directory, and then replacing that directory with a symlink that had a different apparent name that resolved to the same entry in the filesystem, it was thus possible to bypass node-tar symlink checks on directories, essentially allowing an untrusted tar file to symlink into an arbitrary location and subsequently extracting arbitrary files into that location, thus allowing arbitrary file creation and overwrite. These issues were addressed in releases 4.4.18, 5.0.10 and 6.1.9. The v3 branch of node-tar has been deprecated and did not receive patches for these issues. If you are still using a v3 release we recommend you update to a more recent version of node-tar. If this is not possible, a workaround is available in the referenced GHSA-qq89-hq3f-393p.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els1.x86_64",
          "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els2.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-37712"
        },
        {
          "category": "external",
          "summary": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        },
        {
          "category": "external",
          "summary": "https://github.com/npm/node-tar/security/advisories/GHSA-qq89-hq3f-393p",
          "url": "https://github.com/npm/node-tar/security/advisories/GHSA-qq89-hq3f-393p"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2022/12/msg00023.html",
          "url": "https://lists.debian.org/debian-lts-announce/2022/12/msg00023.html"
        },
        {
          "category": "external",
          "summary": "https://www.debian.org/security/2021/dsa-5008",
          "url": "https://www.debian.org/security/2021/dsa-5008"
        },
        {
          "category": "external",
          "summary": "https://www.npmjs.com/package/tar",
          "url": "https://www.npmjs.com/package/tar"
        },
        {
          "category": "external",
          "summary": "https://www.oracle.com/security-alerts/cpuoct2021.html",
          "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
        }
      ],
      "release_date": "2021-08-31T17:15:00Z",
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els1.x86_64",
            "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "details": "important",
          "product_ids": [
            "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els1.x86_64",
            "CentOS-8.4:tar-2:1.30-5.el8.tuxcare.els2.x86_64"
          ]
        }
      ]
    }
  ]
}