{
  "document": {
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "An incorrect authorization check in Mendix applications could allow an attacker to bypass write permissions to attributes of objects under certain circumstances.\n\nMendix has released an update for Mendix and recommends to update to the latest version.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens\u0027 underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter \"License Terms\"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens\u0027 Global Website (https://www.siemens.com/terms_of_use, hereinafter \"Terms of Use\"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-352521: Access Check Bypass Vulnerability in Mendix - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-352521.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-352521: Access Check Bypass Vulnerability in Mendix - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-352521.txt"
      },
      {
        "category": "self",
        "summary": "SSA-352521: Access Check Bypass Vulnerability in Mendix - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-352521.json"
      }
    ],
    "title": "SSA-352521: Access Check Bypass Vulnerability in Mendix",
    "tracking": {
      "current_release_date": "2021-07-13T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-352521",
      "initial_release_date": "2021-07-13T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-07-13T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V7.23.22",
                "product": {
                  "name": "Mendix Applications using Mendix 7",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix Applications using Mendix 7"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V8.18.7",
                "product": {
                  "name": "Mendix Applications using Mendix 8",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix Applications using Mendix 8"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V9.3.0",
                "product": {
                  "name": "Mendix Applications using Mendix 9",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix Applications using Mendix 9"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-33718",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Write access checks of attributes of an object could be bypassed, if user has a write permissions to the first attribute of this object.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "summary": "CVE-2021-33718 - Mendix Applications using Mendix 7",
          "url": "https://docs.mendix.com/releasenotes/studio-pro/7.23"
        },
        {
          "summary": "CVE-2021-33718 - Mendix Applications using Mendix 8",
          "url": "https://docs.mendix.com/releasenotes/studio-pro/8.18"
        },
        {
          "summary": "CVE-2021-33718 - Mendix Applications using Mendix 9",
          "url": "https://docs.mendix.com/releasenotes/studio-pro/9.3"
        },
        {
          "summary": "CVE-2021-33718 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-33718.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V7.23.22 or later version",
          "product_ids": [
            "1"
          ],
          "url": "https://docs.mendix.com/releasenotes/studio-pro/7.23"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V8.18.7 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://docs.mendix.com/releasenotes/studio-pro/8.18"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V9.3.0 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://docs.mendix.com/releasenotes/studio-pro/9.3"
        },
        {
          "category": "workaround",
          "details": "Make the first attribute of the object non-writeable",
          "product_ids": [
            "1",
            "2",
            "3"
          ]
        },
        {
          "category": "workaround",
          "details": "Add a new read attribute and move this up to become the first in the entity attribute table",
          "product_ids": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "title": "CVE-2021-33718"
    }
  ]
}