{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability has been identified in the OPC Foundation Local Discovery Server (LDS) [0] of several industrial products. The vulnerability could cause a denial of service condition on the service or the device.\n\nSiemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.\n\n[0] \nhttps://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-40142.pdf",
        "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: \nhttps://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\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-321292: Denial of Service in the OPC Foundation Local Discovery Server (LDS) in Industrial Products - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-321292.html"
      },
      {
        "category": "self",
        "summary": "SSA-321292: Denial of Service in the OPC Foundation Local Discovery Server (LDS) in Industrial Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-321292.json"
      }
    ],
    "title": "SSA-321292: Denial of Service in the OPC Foundation Local Discovery Server (LDS) in Industrial Products",
    "tracking": {
      "current_release_date": "2024-10-08T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-321292",
      "initial_release_date": "2022-05-10T00:00:00Z",
      "revision_history": [
        {
          "date": "2022-05-10T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2022-07-12T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added fix for SIMATIC NET PC Software V16"
        },
        {
          "date": "2022-08-09T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Added fix for TeleControl Server Basic"
        },
        {
          "date": "2022-12-13T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "Added fix for SIMATIC WinCC Runtime Professional and SIMATIC WinCC Unified PC Runtime"
        },
        {
          "date": "2023-03-14T00:00:00Z",
          "legacy_version": "1.4",
          "number": "5",
          "summary": "Added OpenPCS 7 to the list of affected products"
        },
        {
          "date": "2023-04-11T00:00:00Z",
          "legacy_version": "1.5",
          "number": "6",
          "summary": "Added fix for SIMATIC WinCC"
        },
        {
          "date": "2024-10-08T00:00:00Z",
          "legacy_version": "1.6",
          "number": "7",
          "summary": "Added OpenPCS 7 affected version and clarified no fix planned for OpenPCS 7 V9.1"
        }
      ],
      "status": "interim",
      "version": "7"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "OpenPCS 7 V9.1",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "OpenPCS 7 V9.1"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V14 SP1 Update 14",
                "product": {
                  "name": "SIMATIC NET PC Software V14",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V14"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC NET PC Software V15",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V15"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V16 Update 6",
                "product": {
                  "name": "SIMATIC NET PC Software V16",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V16"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V17 SP1",
                "product": {
                  "name": "SIMATIC NET PC Software V17",
                  "product_id": "5"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V17"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V2020 SP1",
                "product": {
                  "name": "SIMATIC Process Historian OPC UA Server",
                  "product_id": "6"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC Process Historian OPC UA Server"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV8.0",
                "product": {
                  "name": "SIMATIC WinCC",
                  "product_id": "7"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC WinCC"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV18",
                "product": {
                  "name": "SIMATIC WinCC Runtime Professional",
                  "product_id": "8"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC WinCC Runtime Professional"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V18 Update 1",
                "product": {
                  "name": "SIMATIC WinCC Unified PC Runtime V18",
                  "product_id": "9"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC WinCC Unified PC Runtime V18"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.1.1",
                "product": {
                  "name": "TeleControl Server Basic V3",
                  "product_id": "10"
                }
              }
            ],
            "category": "product_name",
            "name": "TeleControl Server Basic V3"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-40142",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "summary",
          "text": "In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service condition by sending carefully crafted messages that lead to access of a memory location after the end of a buffer.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Deactivate the OPC LDS Service if supported by the product use case. The LDS service is not activated in the default configuration",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use VPN for protecting network communication between cells",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "1",
            "3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V14 SP1 Update 14 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109807351/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V18 or later version",
          "product_ids": [
            "8"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109813587/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V18 Update 1 or later version",
          "product_ids": [
            "9"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109807123/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.1.1 or later version",
          "product_ids": [
            "10"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109812231/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V8.0 or later version",
          "product_ids": [
            "7"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109816599/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V16 Update 6 or later version",
          "product_ids": [
            "4"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2020 SP1 or later version",
          "product_ids": [
            "6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "For PCS neo: Update to PCS neo V3.1 SP1\n(\nhttps://support.industry.siemens.com/cs/ww/de/view/109807752/)",
          "product_ids": [
            "6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "For PCS 7: Update to PCS 7 V9.1 SP1 (\nhttps://support.industry.siemens.com/cs/ww/en/view/109805073/)",
          "product_ids": [
            "6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "For WinCC: contact local support",
          "product_ids": [
            "6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V17 SP1 or later version",
          "product_ids": [
            "5"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10"
          ]
        }
      ],
      "title": "CVE-2021-40142"
    }
  ]
}