{
  "document": {
    "title": "SSA-662649: Denial of Service Vulnerability in Desigo DXR and PXC Controllers",
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "publisher": {
      "name": "Siemens ProductCERT",
      "contact_details": "productcert@siemens.com",
      "category": "vendor",
      "namespace": "https://www.siemens.com"
    },
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "tracking": {
      "id": "SSA-662649",
      "status": "interim",
      "version": "2",
      "revision_history": [
        {
          "number": "1",
          "legacy_version": "1.0",
          "date": "2022-05-10T00:00:00Z",
          "summary": "Publication Date"
        },
        {
          "number": "2",
          "legacy_version": "1.1",
          "date": "2022-06-14T00:00:00Z",
          "summary": "Added steps to contact local Siemens office for obtaining update"
        }
      ],
      "initial_release_date": "2022-05-10T00:00:00Z",
      "current_release_date": "2022-06-14T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      }
    },
    "notes": [
      {
        "title": "Summary",
        "category": "summary",
        "text": "A vulnerability in Desigo DXR and PXC controllers has been identified that could allow an attacker to disable and reset a device to factory state using a denial of service attack.\n\nSiemens has released updates for the affected products and recommends to update to the latest versions."
      },
      {
        "title": "General Recommendations",
        "category": "general",
        "text": "As a general security measure Siemens strongly recommends to protect network access to affected products with appropriate mechanisms. It is advised to follow recommended security practices in order to run the devices in a protected IT environment."
      },
      {
        "title": "Additional Resources",
        "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": "Terms of Use",
        "category": "legal_disclaimer",
        "text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens' 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' 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."
      }
    ],
    "references": [
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-662649.pdf",
        "summary": "SSA-662649: Denial of Service Vulnerability in Desigo DXR and PXC Controllers - PDF Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-662649.txt",
        "summary": "SSA-662649: Denial of Service Vulnerability in Desigo DXR and PXC Controllers - TXT Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-662649.json",
        "summary": "SSA-662649: Denial of Service Vulnerability in Desigo DXR and PXC Controllers - CSAF Version"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "name": "Siemens",
        "category": "vendor",
        "branches": [
          {
            "name": "Desigo DXR2",
            "category": "product_name",
            "branches": [
              {
                "name": "< V01.21.142.5-22",
                "category": "product_version_range",
                "product": {
                  "product_id": "1",
                  "name": "Desigo DXR2"
                }
              }
            ]
          },
          {
            "name": "Desigo PXC3",
            "category": "product_name",
            "branches": [
              {
                "name": "< V01.21.142.4-18",
                "category": "product_version_range",
                "product": {
                  "product_id": "2",
                  "name": "Desigo PXC3"
                }
              }
            ]
          },
          {
            "name": "Desigo PXC4",
            "category": "product_name",
            "branches": [
              {
                "name": "< V02.20.142.10-10884",
                "category": "product_version_range",
                "product": {
                  "product_id": "3",
                  "name": "Desigo PXC4"
                }
              }
            ]
          },
          {
            "name": "Desigo PXC5",
            "category": "product_name",
            "branches": [
              {
                "name": "< V02.20.142.10-10884",
                "category": "product_version_range",
                "product": {
                  "product_id": "4",
                  "name": "Desigo PXC5"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "title": "CVE-2021-41545",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "When the controller receives a specific BACnet protocol packet, an exception causes the BACnet communication function to go into a “out of work” state and could result in the controller going into a “factory reset” state."
        }
      ],
      "cve": "CVE-2021-41545",
      "cwe": {
        "id": "CWE-248",
        "name": "Uncaught Exception"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C"
          },
          "products": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1"
          ],
          "category": "vendor_fix",
          "details": "Update to V01.21.142.5-22 or later version. Please contact your local Siemens office for additional support in obtaining the update."
        },
        {
          "product_ids": [
            "2"
          ],
          "category": "vendor_fix",
          "details": "Update to V01.21.142.4-18 or later version. Please contact your local Siemens office for additional support in obtaining the update."
        },
        {
          "product_ids": [
            "3",
            "4"
          ],
          "category": "vendor_fix",
          "details": "Update to V02.20.142.10-10884 or later version. Please contact your local Siemens office for additional support in obtaining the update."
        }
      ],
      "references": [
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-41545.json",
          "summary": "CVE-2021-41545 Mitre 5.0 json"
        }
      ]
    }
  ]
}