{
  "document": {
    "acknowledgments": [
      {
        "organization": "Siemens",
        "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 allows an unauthenticated attacker to read PLC variables from affected devices without proper authentication under certain circumstances.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Multiple",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Germany",
        "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": "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": "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": "external",
        "summary": "SSA-865327: Incorrect Authorization Vulnerability in Industrial Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-865327.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-21-257-23 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-257-23.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-21-257-23 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-257-23"
      },
      {
        "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"
      },
      {
        "category": "external",
        "summary": "SSA-865327: Incorrect Authorization Vulnerability in Industrial Products - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-865327.pdf"
      },
      {
        "category": "external",
        "summary": "SSA-865327: Incorrect Authorization Vulnerability in Industrial Products - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-865327.txt"
      }
    ],
    "title": "Siemens SIMATIC and TIM",
    "tracking": {
      "current_release_date": "2021-09-14T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-21-257-23",
      "initial_release_date": "2021-09-14T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2021-09-14T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-21-257-23 Siemens SIMATIC and TIM"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2.9.2",
                "product": {
                  "name": "SIMATIC Drive Controller family",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC Drive Controller family"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V21.9",
                "product": {
                  "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e V2 \u003c V4",
                "product": {
                  "name": "SIMATIC S7 PLCSIM Advanced",
                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7 PLCSIM Advanced"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Version V4.4",
                "product": {
                  "name": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e V2.5 \u003c V2.9.2",
                "product": {
                  "name": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
                  "product_id": "CSAFPID-0005"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e V2.5 \u003c V21.9",
                "product": {
                  "name": "SIMATIC S7-1500 Software Controller",
                  "product_id": "CSAFPID-0006"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1500 Software Controller"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Version V2.1",
                "product": {
                  "name": "TIM 1531 IRC (incl. SIPLUS NET variants)",
                  "product_id": "CSAFPID-0007"
                }
              }
            ],
            "category": "product_name",
            "name": "TIM 1531 IRC (incl. SIPLUS NET variants)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-28397",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006",
          "CSAFPID-0007"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-28397 - SIMATIC Drive Controller family",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773914/"
        },
        {
          "summary": "CVE-2020-28397 - SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759122/"
        },
        {
          "summary": "CVE-2020-28397 - SIMATIC S7 PLCSIM Advanced",
          "url": "https://support.industry.siemens.com/cs/de/en/view/109795016"
        },
        {
          "summary": "CVE-2020-28397 - SIMATIC S7-1200 CPU family (incl. SIPLUS variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793280"
        },
        {
          "summary": "CVE-2020-28397 - SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478459/"
        },
        {
          "summary": "CVE-2020-28397 - SIMATIC S7-1500 Software Controller",
          "url": "https://support.industry.siemens.com/cs/de/en/view/109478528/"
        },
        {
          "summary": "CVE-2020-28397 - TIM 1531 IRC (incl. SIPLUS NET variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109798331"
        },
        {
          "summary": "CVE-2020-28397 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-28397.json"
        },
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28397"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V2.9.2 or later version",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773914/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V21.9 or later version",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759122/"
        },
        {
          "category": "vendor_fix",
          "details": "Updated to V4 or later version",
          "product_ids": [
            "CSAFPID-0003"
          ],
          "url": "https://support.industry.siemens.com/cs/de/en/view/109795016"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.4.1 or later version",
          "product_ids": [
            "CSAFPID-0004"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793280"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.9.2 or later version",
          "product_ids": [
            "CSAFPID-0005"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478459/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V21.9 or later version",
          "product_ids": [
            "CSAFPID-0006"
          ],
          "url": "https://support.industry.siemens.com/cs/de/en/view/109478528/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.2 or later version",
          "product_ids": [
            "CSAFPID-0007"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109798331"
        },
        {
          "category": "mitigation",
          "details": "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: 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",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ],
      "title": "CVE-2020-28397"
    }
  ]
}