ssa-568427
Vulnerability from csaf_siemens
Published
2022-10-11 00:00
Modified
2022-10-11 00:00
Summary
SSA-568427: Weak Key Protection Vulnerability in SIMATIC S7-1200 and S7-1500 CPU Families

Notes

Summary
SIMATIC S7-1200, S7-1500 CPUs and related products protect the built-in global private key in a way that cannot be considered sufficient any longer. The key is used for the legacy protection of confidential configuration data and the legacy PG/PC and HMI communication. This could allow attackers to discover the private key of a CPU product family by an offline attack against a single CPU of the family. Attackers could then use this knowledge to extract confidential configuration data from projects that are protected by that key or to perform attacks against legacy PG/PC and HMI communication. Siemens recommends to update both the affected products as well as the corresponding TIA Portal project to the latest versions. TIA Portal V17 and related CPU firmware versions introduced protection of confidential configuration data based on individual passwords per device and TLS-protected PG/PC and HMI communication. Additional details can be found in the related Siemens security bulletin SSB-898115 ( https://cert-portal.siemens.com/productcert/html/ssb-898115.html).
General Recommendations
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. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use
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.


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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "SIMATIC S7-1200, S7-1500 CPUs and related products protect the built-in global private key in a way that cannot be considered sufficient any longer. The key is used for the legacy protection of confidential configuration data and the legacy PG/PC and HMI communication.\n\nThis could allow attackers to discover the private key of a CPU product family by an offline attack against a single CPU of the family. Attackers could then use this knowledge to extract confidential configuration data from projects that are protected by that key or to perform attacks against legacy PG/PC and HMI communication.\nSiemens recommends to update both the affected products as well as the corresponding TIA Portal project to the latest versions. TIA Portal V17 and related CPU firmware versions introduced protection of confidential configuration data based on individual passwords per device and TLS-protected PG/PC and HMI communication.\n\nAdditional details can be found in the related Siemens security bulletin SSB-898115 (\nhttps://cert-portal.siemens.com/productcert/html/ssb-898115.html).",
        "title": "Summary"
      },
      {
        "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\u0027 operational guidelines for Industrial Security (Download: \nhttps://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\nAdditional information on Industrial Security by Siemens can be found at: \nhttps://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "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": "legal_disclaimer",
        "text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens\u0027 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\u0027 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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-568427: Weak Key Protection Vulnerability in SIMATIC S7-1200 and S7-1500 CPU Families - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-568427.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-568427: Weak Key Protection Vulnerability in SIMATIC S7-1200 and S7-1500 CPU Families - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-568427.txt"
      },
      {
        "category": "self",
        "summary": "SSA-568427: Weak Key Protection Vulnerability in SIMATIC S7-1200 and S7-1500 CPU Families - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-568427.json"
      }
    ],
    "title": "SSA-568427: Weak Key Protection Vulnerability in SIMATIC S7-1200 and S7-1500 CPU Families",
    "tracking": {
      "current_release_date": "2022-10-11T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-568427",
      "initial_release_date": "2022-10-11T00:00:00Z",
      "revision_history": [
        {
          "date": "2022-10-11T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "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": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC Drive Controller family"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V21.9",
                "product": {
                  "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V4.5.0",
                "product": {
                  "name": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2.9.2",
                "product": {
                  "name": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
                  "product_id": "5"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V21.9",
                "product": {
                  "name": "SIMATIC S7-1500 Software Controller",
                  "product_id": "6"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1500 Software Controller"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V4.0",
                "product": {
                  "name": "SIMATIC S7-PLCSIM Advanced",
                  "product_id": "7"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-PLCSIM Advanced"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-38465",
      "cwe": {
        "id": "CWE-522",
        "name": "Insufficiently Protected Credentials"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected products  protect the built-in global private key in a way that cannot be considered sufficient any longer. The key is used for the legacy protection of confidential configuration data and the legacy PG/PC and HMI communication.\r\n\r\nThis could allow attackers to discover the private key of a CPU product family by an offline attack against a single CPU of the family. Attackers could then use this knowledge to extract confidential configuration data from projects that are protected by that key or to perform attacks against legacy PG/PC and HMI communication.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Use legacy (i.e., not TLS-based) PG/PC and HMI communication only in trusted network environments",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ]
        },
        {
          "category": "mitigation",
          "details": "Protect access to the TIA Portal project and CPU (including related memory cards) from unauthorized actors",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "2"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.9.2 or later version, migrate project in TIA Portal to this version and redeploy.",
          "product_ids": [
            "1"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773914/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "1"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773914/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V21.9 or later version, migrate project in TIA Portal to this version and redeploy.",
          "product_ids": [
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759122/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759122/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.5.0 or later version, migrate project in TIA Portal to this version and redeploy.",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793280/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793280/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.9.2 or later version, migrate project in TIA Portal to this version and redeploy.",
          "product_ids": [
            "5"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478459/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "5"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478459/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V21.9 or later version, migrate project in TIA Portal to this version and redeploy.",
          "product_ids": [
            "6"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478528/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "6"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109478528/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.0 or later version, migrate project in TIA Portal to the corresponding version and redeploy.",
          "product_ids": [
            "7"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109795016/"
        },
        {
          "category": "vendor_fix",
          "details": "Within the project, configure the CPU to \n\"Only allow secure PG/PC and HMI communication\"",
          "product_ids": [
            "7"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109795016/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ]
        }
      ],
      "title": "CVE-2022-38465"
    }
  ]
}


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