{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Alexander Bolshev"
        ],
        "organization": "IOActive",
        "summary": "reporting this vulnerability to Siemens"
      },
      {
        "names": [
          "Ivan Yushkevich"
        ],
        "organization": "Embedi",
        "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": "Successful exploitation of this vulnerability could allow an attacker with physical access to read sensitive data located in the app \u0027s directory.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Chemical, Energy, Food and Agriculture, and 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 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": "NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "other",
        "text": "No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. High skill level is needed to exploit.",
        "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-18-109-01 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2018/icsa-18-109-01.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-18-109-01 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-18-109-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-18-109-01"
      }
    ],
    "title": "Siemens SIMATIC WinCC OA Operator IOS App (Update A)",
    "tracking": {
      "current_release_date": "2018-10-09T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-18-109-01",
      "initial_release_date": "2018-04-19T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2018-04-19T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-18-109-01 Siemens SIMATIC WinCC OA Operator IOS App"
        },
        {
          "date": "2018-10-09T00:00:00.000000Z",
          "legacy_version": "A",
          "number": "2",
          "summary": "ICSA-18-109-01 Siemens SIMATIC WinCC OA Operator iOS App (Update A)"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c 1.4",
                "product": {
                  "name": "SIMATIC WinCC OA Operator iOS App: All versions prior to v1.4",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC WinCC OA Operator iOS App"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-4847",
      "cwe": {
        "id": "CWE-538",
        "name": "Insertion of Sensitive Information into Externally-Accessible File or Directory"
      },
      "notes": [
        {
          "category": "summary",
          "text": "An attacker with physical access to the mobile device could read unencrypted sensitive data from the app \u0027s directory. CVE-2018-4847 has been assigned to this vulnerability. A CVSS v3 base score of 4.0 has been calculated; the CVSS vector string is (AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N).",
          "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-2018-4847"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Siemens has recommended that users update to v1.4, which can be located here:",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://itunes.apple.com/app/simatic-wincc-oa-operator/id681238489"
        },
        {
          "category": "mitigation",
          "details": "Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk: Toggle off the button to save password while logging in and logout after every work session.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk: Follow the SIMATIC WinCC OA Security Guideline (available at https://portal.etm.at/index.php? option=com_phocadownload\u0026view=category\u0026id=52:security\u0026Itemid=81) for maintaining a secured SIMATIC WinCC OA environment.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://portal.etm.at/index.php?%20option=com_phocadownload\u0026view=category\u0026id=52:security\u0026Itemid=81"
        },
        {
          "category": "mitigation",
          "details": "Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk: Siemens does not recommend to use the app in high security areas.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens\u2019 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and following the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.siemens.com/cert/operational-guidelines-industrial-security"
        },
        {
          "category": "mitigation",
          "details": "For more information on this vulnerability and associated mitigation practices please see Siemens security advisory SSA-597741 on their website:",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.siemens.com/cert/advisories%20%20"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.0,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    }
  ]
}