{
  "document": {
    "acknowledgments": [
      {
        "organization": "Parity Dynamics Research Team",
        "summary": "reporting this vulnerability to CISA"
      }
    ],
    "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 cause a denial-of-service condition, which could result in a failure of the EcoStruxture Control Expert Simulator.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Commercial Facilities, Energy, Food and Agriculture, Government Facilities, Transportation Systems, Water and Wastewater Systems",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "France",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.\nCISA also provides a section for control systems security recommended practices on the ICS webpage onus-cert.cisa.gov. 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 on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.\nOrganizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA 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-20-315-03 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2020/icsa-20-315-03.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-20-315-03 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-20-315-03"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B"
      }
    ],
    "title": "Schneider Electric PLC Simulator for EcoStruxure Control Expert",
    "tracking": {
      "current_release_date": "2020-11-10T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-20-315-03",
      "initial_release_date": "2020-11-10T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2020-11-10T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-20-315-03 Schneider Electric PLC Simulator for EcoStruxure Control Expert"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "vers:all/*",
                "product": {
                  "name": "PLC Simulator for Unity Pro (former name of EcoStruxure Control Expert): all versions",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "PLC Simulator for Unity Pro (former name of EcoStruxure Control Expert)"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "vers:all/*",
                "product": {
                  "name": "PLC Simulator for EcoStruxure Control Expert: all versions",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "PLC Simulator for EcoStruxure Control Expert"
          }
        ],
        "category": "vendor",
        "name": "Schneider Electric Software, LLC"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-7538",
      "cwe": {
        "id": "CWE-754",
        "name": "Improper Check for Unusual or Exceptional Conditions"
      },
      "notes": [
        {
          "category": "summary",
          "text": "A vulnerability exists that could cause a crash of the PLC simulator present in EcoStruxure Control Expert software when receiving a specially crafted request over Modbus.CVE-2020-7538 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7538"
        },
        {
          "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:H"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Schneider Electric has released Version 15.0 of the EcoStruxure Control Expert software to mitigate this vulnerability. It is available for download on the Schneider Electric website.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ],
          "url": "https://www.se.com/ww/en/product-range-download/548-ecostruxure%E2%84%A2-control-expert/?parent-subcategory-id=3950\u0026filter=business-1-industrial-automation-and-control\u0026selected-node-id=12365959203#/software-firmware-tab"
        },
        {
          "category": "mitigation",
          "details": "In the option dialog box of the PLC simulator, set the listening IP Address to 127.0.0.1 (localhost), which will prevent remote network connections to the PLC simulator.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "The default listening IP address is: 0.0.0.0. The default setting exposes the PLC to the vulnerability described in this advisory.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "Schneider Electric recommends using appropriate patching methodologies when applying these patches. It also strongly recommends the use of back-ups and evaluating the impact of these patches in a test and development environment or on offline infrastructure. Contact Schneider Electric\u0027s Customer Care Center for assistance removing a patch.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ],
          "url": "https://www.se.com/ww/en/work/support/country-selector/contact-us.jsp"
        },
        {
          "category": "mitigation",
          "details": "If users choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit:",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "Set up network segmentation and implement a firewall to block all unauthorized access to Port 502/TCP",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Harden the engineering workstation running PLC Simulator for EcoStruxure Control Expert",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "Follow workstation, network, and site-hardening guidelines in the Cybersecurity Best Practices guide.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ],
          "url": "https://www.se.com/ww/en/download/document/CS-Best-Practices-2019-340/"
        },
        {
          "category": "mitigation",
          "details": "Please see Schneider Electric Security Notification number SEVD-2020-315-07 for more information.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ],
          "url": "https://www.schneider-electric.com/ww/en/download/document/SEVD-2020-315-07"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        }
      ]
    }
  ]
}