{
  "document": {
    "acknowledgments": [
      {
        "organization": "Tenable Network Security",
        "summary": "reporting this vulnerability to Siemens"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://us-cert.cisa.gov/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov",
        "title": "CISA Disclaimer"
      },
      {
        "category": "legal_disclaimer",
        "text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
        "title": "Legal Notice"
      },
      {
        "category": "summary",
        "text": "ATTENTION: Remotely exploitable/low skill level to exploit.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Chemical, Energy, Food and Agriculture, Water and Wastewater Systems",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Germany",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available in the ICS -CERT Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "other",
        "text": "No known public exploits specifically target this vulnerability.",
        "title": "Exploitability"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "Email: CISAservicedesk@cisa.dhs.gov;\n Toll Free: 1-888-282-0870",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-17-192-01 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2017/icsa-17-192-01.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-17-192-01 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-17-192-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-17-192-01"
      }
    ],
    "title": "Siemens SIMATIC Logon",
    "tracking": {
      "current_release_date": "2017-07-11T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-17-192-01",
      "initial_release_date": "2017-07-11T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2017-07-11T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c 1.6",
                "product": {
                  "name": "SIMATIC Logon: All versions prior to V1.6",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC Logon"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2017-9938",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Specially crafted packets sent to the SIMATIC Logon Remote Access service on Port 16389/TCP could cause a denial-of-service condition. The service restarts automatically.CVE-2017-9938 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-9938"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Siemens created a software upgrade V1.6 for SIMATIC Logon which fixes the vulnerability, and they recommend users upgrade to the newest version. Please contact the local Siemens representative or customer support at the following location:",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "https://www.siemens.de/automation/partner",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.siemens.de/automation/partner"
        },
        {
          "category": "vendor_fix",
          "details": "Siemens strongly recommends users protect network access to the Port 16389/TCP of the SIMATIC Logon Remote Access service with appropriate mechanisms. Siemens also advises that users configure the operational environment according to Siemens \u0027 Operational Guidelines for Industrial Security:",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "https://www.siemens.com/cert/operational-guidelines-industrial-security",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.siemens.com/cert/operational-guidelines-industrial-security"
        },
        {
          "category": "vendor_fix",
          "details": "For a more specific list of affected products and more detailed mitigation instructions, please see Siemens Security Advisory SSA-804859 at the following location:",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "http://www.siemens.com/cert/advisories",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "http://www.siemens.com/cert/advisories"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    }
  ]
}