ssa-625789
Vulnerability from csaf_siemens
Published
2011-06-10 00:00
Modified
2025-10-14 00:00
Summary
SSA-625789: Multiple Vulnerabilities in SIMATIC S7-1200 CPU V1/V2 Devices

Notes

Summary
SIMATIC S7-1200 CPU V1/V2 controllers contain two vulnerabilities that could allow an unauthenticated remote attacker - to trigger functions by record and playback of legitimate network communication, or - to place the controller in stop/defect state by causing a communications error. Siemens has released new versions for the affected products and recommends to update to the latest versions.
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
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.


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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "SIMATIC S7-1200 CPU V1/V2 controllers contain two vulnerabilities that could allow an unauthenticated remote attacker\n\n- to trigger functions by record and playback of legitimate network communication, or\n- to place the controller in stop/defect state by causing a communications error.\n\nSiemens has released new versions for the affected products and recommends to update to the latest versions.",
        "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: https://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: https://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": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/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-625789: Multiple Vulnerabilities in SIMATIC S7-1200 CPU V1/V2 Devices - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-625789.html"
      },
      {
        "category": "self",
        "summary": "SSA-625789: Multiple Vulnerabilities in SIMATIC S7-1200 CPU V1/V2 Devices - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-625789.json"
      }
    ],
    "title": "SSA-625789: Multiple Vulnerabilities in SIMATIC S7-1200 CPU V1/V2 Devices",
    "tracking": {
      "current_release_date": "2025-10-14T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-625789",
      "initial_release_date": "2011-06-10T00:00:00Z",
      "revision_history": [
        {
          "date": "2011-06-10T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2011-07-05T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Modification of CVSS scoring, solution and version information"
        },
        {
          "date": "2011-09-12T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Update of solution section by removing mentioning of air gap"
        },
        {
          "date": "2020-02-10T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "SIPLUS devices now explicitly mentioned in the list of affected products"
        },
        {
          "date": "2025-10-14T00:00:00Z",
          "legacy_version": "1.4",
          "number": "5",
          "summary": "Assigned CVE IDs (CVE-2011-20001/-20002) instead of the deprecated SVE IDs (SVE-2011-0001/-0002); Corrected CVSS vector of CVE-2011-20002; Updated SSA to current data model and support of csaf"
        }
      ],
      "status": "interim",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.0.3",
                "product": {
                  "name": "SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.0.2",
                "product": {
                  "name": "SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.0.3",
                "product": {
                  "name": "SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c2.0.2",
                "product": {
                  "name": "SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2011-20001",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The web server interface of affected devices improperly processes incoming malformed HTTP traffic at high rate. This could allow an unauthenticated remote attacker to force the device entering the stop/defect state, thus creating a denial of service condition.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "3"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Disable the web server if possible",
          "product_ids": [
            "1",
            "3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.0.3 or later version",
          "product_ids": [
            "1",
            "3"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "1",
            "3"
          ]
        }
      ],
      "title": "CVE-2011-20001"
    },
    {
      "cve": "CVE-2011-20002",
      "cwe": {
        "id": "CWE-294",
        "name": "Authentication Bypass by Capture-replay"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected controllers are vulnerable to capture-replay in the communication with the engineering software. This could allow an on-path attacker between the engineering software and the controller to execute any previously recorded commands at a later time (e.g. set the controller to STOP), regardless whether or not the controller had a password configured.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "2",
          "4"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V2.0.2 or later version",
          "product_ids": [
            "2",
            "4"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "2",
            "4"
          ]
        }
      ],
      "title": "CVE-2011-20002"
    }
  ]
}


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