GSD-2021-42521

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn't check the return value of libxml2 API 'xmlDocGetRootElement', and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.
Aliases
Aliases
CVE-2021-42521
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{
  "GSD": {
    "alias": "CVE-2021-42521",
    "description": "There is a NULL pointer dereference vulnerability in VTK, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn\u0027t check the return value of libxml2 API \u0027xmlDocGetRootElement\u0027, and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.",
    "id": "GSD-2021-42521",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-42521.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-42521"
      ],
      "details": "There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn\u0027t check the return value of libxml2 API \u0027xmlDocGetRootElement\u0027, and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.",
      "id": "GSD-2021-42521",
      "modified": "2023-12-13T01:23:06.217637Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "patrick@puiterwijk.org",
        "ID": "CVE-2021-42521",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "vtk",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "VTK - 9.0.0 and before"
                        }
                      ]
                    }
                  }
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            "value": "There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn\u0027t check the return value of libxml2 API \u0027xmlDocGetRootElement\u0027, and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application."
          }
        ]
      },
      "problemtype": {
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            "name": "https://gitlab.kitware.com/vtk/vtk/issues/17818",
            "refsource": "MISC",
            "url": "https://gitlab.kitware.com/vtk/vtk/issues/17818"
          },
          {
            "name": "https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549",
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            "url": "https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549"
          },
          {
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            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK/"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=0,\u003c9.0.1",
          "affected_versions": "All versions starting from 0 before 9.0.1",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-476",
            "CWE-937"
          ],
          "date": "2022-09-16",
          "description": "There is a NULL pointer dereference vulnerability in VTK, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn\u0027t check the return value of libxml2 API \u0027xmlDocGetRootElement\u0027, and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.",
          "fixed_versions": [
            "9.0.1"
          ],
          "identifier": "CVE-2021-42521",
          "identifiers": [
            "GHSA-xfhg-9pjg-xg7g",
            "CVE-2021-42521"
          ],
          "not_impacted": "All versions before 0, all versions starting from 9.0.1",
          "package_slug": "pypi/vtk",
          "pubdate": "2022-08-26",
          "solution": "Upgrade to version 9.0.1 or above.",
          "title": "NULL Pointer Dereference",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-42521",
            "https://gitlab.kitware.com/vtk/vtk/issues/17818",
            "https://github.com/pypa/advisory-database/tree/main/vulns/vtk/PYSEC-2022-255.yaml",
            "https://github.com/advisories/GHSA-xfhg-9pjg-xg7g"
          ],
          "uuid": "7419d730-d327-4e77-b028-62e9471a49b3"
        }
      ]
    },
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        "nodes": [
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            "children": [],
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                "cpe23Uri": "cpe:2.3:a:vtk:vtk:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "9.0.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
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      "cve": {
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          "ASSIGNER": "patrick@puiterwijk.org",
          "ID": "CVE-2021-42521"
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        "data_type": "CVE",
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        "description": {
          "description_data": [
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              "value": "There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn\u0027t check the return value of libxml2 API \u0027xmlDocGetRootElement\u0027, and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-476"
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        "references": {
          "reference_data": [
            {
              "name": "https://gitlab.kitware.com/vtk/vtk/issues/17818",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://gitlab.kitware.com/vtk/vtk/issues/17818"
            },
            {
              "name": "https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549",
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              "url": "https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549"
            },
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              "refsource": "FEDORA",
              "tags": [],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-05-11T05:15Z",
      "publishedDate": "2022-08-25T18:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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