{
  "document": {
    "title": "SSA-100232: Denial-of-Service vulnerability in SCALANCE X Switches",
    "category": "Siemens 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-100232",
      "status": "final",
      "version": "5",
      "revision_history": [
        {
          "number": "1",
          "legacy_version": "1.0",
          "date": "2019-08-13T00:00:00Z",
          "summary": "Publication Date"
        },
        {
          "number": "2",
          "legacy_version": "1.1",
          "date": "2020-02-10T00:00:00Z",
          "summary": "SIPLUS devices now explicitly mentioned in the list of affected products"
        },
        {
          "number": "3",
          "legacy_version": "1.2",
          "date": "2021-02-09T00:00:00Z",
          "summary": "Added update information for SCALANCE X-200IRT switch family"
        },
        {
          "number": "4",
          "legacy_version": "1.3",
          "date": "2021-09-14T00:00:00Z",
          "summary": "Added solution for SCALANCE X-200 switch family"
        },
        {
          "number": "5",
          "legacy_version": "1.4",
          "date": "2022-02-08T00:00:00Z",
          "summary": "Specifically added that SCALANCE X204RNA devices do not have any fix planned"
        }
      ],
      "initial_release_date": "2019-08-13T00:00:00Z",
      "current_release_date": "2022-02-08T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      }
    },
    "notes": [
      {
        "title": "Summary",
        "category": "summary",
        "text": "A vulnerability in several SCALANCE X devices could allow an unauthenticated attacker with network access to an affected device to perform a denial-of-service.\n\nSiemens has released an update for SCALANCE X-200IRT and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet available."
      },
      {
        "title": "General Recommendations",
        "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' 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": "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-100232.pdf",
        "summary": "SSA-100232: Denial-of-Service vulnerability in SCALANCE X Switches - PDF Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-100232.txt",
        "summary": "SSA-100232: Denial-of-Service vulnerability in SCALANCE X Switches - TXT Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-100232.json",
        "summary": "SSA-100232: Denial-of-Service vulnerability in SCALANCE X Switches - CSAF Version"
      }
    ],
    "acknowledgments": [
      {
        "names": [
          "Artem Zinenko"
        ],
        "organization": "Kaspersky",
        "summary": "pointing out that SIPLUS should also be mentioned"
      },
      {
        "names": [
          "Younes Dragoni",
          "Alessandro Di Pinto"
        ],
        "organization": "Nozomi Networks",
        "summary": "reporting the vulnerability"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "name": "Siemens",
        "category": "vendor",
        "branches": [
          {
            "name": "SCALANCE X204RNA (HSR)",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "1",
                  "name": "SCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2)",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK5204-0BA00-2MB2"
                    ]
                  }
                }
              }
            ]
          },
          {
            "name": "SCALANCE X204RNA (PRP)",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "2",
                  "name": "SCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2)",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK5204-0BA00-2KB2"
                    ]
                  }
                }
              }
            ]
          },
          {
            "name": "SCALANCE X204RNA EEC (HSR)",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "3",
                  "name": "SCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3)",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK5204-0BS00-2NA3"
                    ]
                  }
                }
              }
            ]
          },
          {
            "name": "SCALANCE X204RNA EEC (PRP)",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "4",
                  "name": "SCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3)",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK5204-0BS00-3LA3"
                    ]
                  }
                }
              }
            ]
          },
          {
            "name": "SCALANCE X204RNA EEC (PRP/HSR)",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "5",
                  "name": "SCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3)",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK5204-0BS00-3PA3"
                    ]
                  }
                }
              }
            ]
          },
          {
            "name": "SCALANCE X-200 switch family (incl. SIPLUS NET variants)",
            "category": "product_name",
            "branches": [
              {
                "name": "< V5.2.5",
                "category": "product_version_range",
                "product": {
                  "product_id": "6",
                  "name": "SCALANCE X-200 switch family (incl. SIPLUS NET variants)"
                }
              }
            ]
          },
          {
            "name": "SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)",
            "category": "product_name",
            "branches": [
              {
                "name": "< V5.5.0",
                "category": "product_version_range",
                "product": {
                  "product_id": "7",
                  "name": "SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "title": "CVE-2019-10942",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "The device contains a vulnerability that could allow an attacker to trigger a denial-of-service condition by sending large message packages repeatedly to the telnet service.\n\nThe security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the device."
        }
      ],
      "cve": "CVE-2019-10942",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:T/RC:C"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ],
          "category": "no_fix_planned",
          "details": "Currently no remediation is planned"
        },
        {
          "product_ids": [
            "6"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.2.5 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109801131/"
        },
        {
          "product_ids": [
            "7"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.5.0 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109792534/"
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ],
          "category": "mitigation",
          "details": "Restrict network access to port 23/tcp of the device"
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ],
          "category": "mitigation",
          "details": "Disable telnet service on affected devices and use SSH instead"
        }
      ],
      "references": [
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109801131/",
          "summary": "CVE-2019-10942 - SCALANCE X-200 switch family (incl. SIPLUS NET variants)"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109792534/",
          "summary": "CVE-2019-10942 - SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2019-10942.json",
          "summary": "CVE-2019-10942 Mitre 5.0 json"
        }
      ]
    }
  ]
}