{
  "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 in the underlying third party component OPC UA ANSIC Stack (also called Legacy C-Stack) affects several industrial products. The vulnerability could cause a crash of the component that includes the vulnerable part of the stack.\n\nSiemens has released updates for the affected products and recommends to update to the latest versions.",
        "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-285795: Denial of Service in OPC-UA in Industrial Products - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-285795.html"
      },
      {
        "category": "self",
        "summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-285795.json"
      },
      {
        "category": "self",
        "summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-285795.txt"
      }
    ],
    "title": "SSA-285795: Denial of Service in OPC-UA in Industrial Products",
    "tracking": {
      "current_release_date": "2023-10-10T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-285795",
      "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": "2022-10-11T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "Added SIMATIC HMI Comfort Outdoor Panels and SIMATIC HMI KTP Mobile Panels to list of affected products"
        },
        {
          "date": "2023-10-10T00:00:00Z",
          "legacy_version": "1.4",
          "number": "5",
          "summary": "Added fix for SITOP Manager"
        }
      ],
      "status": "interim",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V17 Update 5",
                "product": {
                  "name": "SIMATIC HMI Comfort Outdoor Panels (incl. SIPLUS variants)",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Comfort Outdoor Panels (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V17 Update 5",
                "product": {
                  "name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V17 Update 5",
                "product": {
                  "name": "SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V14 SP1 Update 14",
                "product": {
                  "name": "SIMATIC NET PC Software V14",
                  "product_id": "4"
                }
              }
            ],
            "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": "5"
                }
              }
            ],
            "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": "6"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V16"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V17 SP 1",
                "product": {
                  "name": "SIMATIC NET PC Software V17",
                  "product_id": "7"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC NET PC Software V17"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cV1.2.4",
                "product": {
                  "name": "SITOP Manager",
                  "product_id": "8"
                }
              }
            ],
            "category": "product_name",
            "name": "SITOP Manager"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cV3.1.1",
                "product": {
                  "name": "TeleControl Server Basic V3",
                  "product_id": "9"
                }
              }
            ],
            "category": "product_name",
            "name": "TeleControl Server Basic V3"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-45117",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The OPC UA ANSIC Stack (also called Legacy C-Stack) was reported to crash when an unexpected OPC UA Response message status code was accessed via the synchronous Client API. The vulnerability was found in generated code of the OPC Foundation C-Stack. An unexpected status code in response message will dereference Null pointer leading to crash, ping of death (PoD). This affects a client, but it might also affect a server when it uses OpcUa_ClientApi_RegisterServer (e.g. register at LDS). A specially crafted UA server, or Man in the Middle attacker, can cause the OPC UA application to crash by sending uncertain status code in response message.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Do not use OPC client feature to connect via untrusted networks or to untrusted OPC-UA communication partners",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use VPN for protecting network communication between cells",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V1.2.4 or later version",
          "product_ids": [
            "8"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109760607/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.1.1 or later version",
          "product_ids": [
            "9"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109812231/"
        },
        {
          "category": "vendor_fix",
          "details": "Update SIMATIC WinCC (TIA Portal) to V17 Update 5 or newer, and then update panel to V17 Update 5 or newer",
          "product_ids": [
            "1",
            "2",
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109746530/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V16 Update 6 or later version",
          "product_ids": [
            "6"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109811815/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V14 SP1 Update 14 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109807351/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V17 SP1 or later version",
          "product_ids": [
            "7"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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"
          ]
        }
      ],
      "title": "CVE-2021-45117"
    }
  ]
}