{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Uri Katz"
        ],
        "organization": "Claroty",
        "summary": "coordinated disclosure"
      }
    ],
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "Multiple SIMATIC Software products are affected by a vulnerability that could allow an attacker to manipulate project files and remotely execute code.\n\nSiemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.",
        "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.\n\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": "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-641963: Remote Code Execution Vulnerability in Multiple SIMATIC Software Products - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-641963: Remote Code Execution Vulnerability in Multiple SIMATIC Software Products - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-641963.txt"
      },
      {
        "category": "self",
        "summary": "SSA-641963: Remote Code Execution Vulnerability in Multiple SIMATIC Software Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-641963.json"
      }
    ],
    "title": "SSA-641963: Remote Code Execution Vulnerability in Multiple SIMATIC Software Products",
    "tracking": {
      "current_release_date": "2021-07-13T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-641963",
      "initial_release_date": "2021-07-13T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-07-13T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC PCS 7 V8.2 and earlier",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC PCS 7 V8.2 and earlier"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V9.0 SP3",
                "product": {
                  "name": "SIMATIC PCS 7 V9.0",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC PCS 7 V9.0"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V9.2",
                "product": {
                  "name": "SIMATIC PDM",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC PDM"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.6 SP2 HF3",
                "product": {
                  "name": "SIMATIC STEP 7 V5.X",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC STEP 7 V5.X"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.4 HF2",
                "product": {
                  "name": "SINAMICS STARTER (containing STEP 7 OEM version)",
                  "product_id": "5"
                }
              }
            ],
            "category": "product_name",
            "name": "SINAMICS STARTER (containing STEP 7 OEM version)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-31893",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "summary": "CVE-2021-31893 - SIMATIC PDM",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/"
        },
        {
          "summary": "CVE-2021-31893 - SIMATIC STEP 7 V5.X",
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/"
        },
        {
          "summary": "CVE-2021-31893 - SINAMICS STARTER (containing STEP 7 OEM version)",
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/"
        },
        {
          "summary": "CVE-2021-31893 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31893.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "details": "Currently no remediation is available",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V9.0 SP3 or later version",
          "product_ids": [
            "2"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V9.2 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.6 SP2 HF3 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.4 HF2 or later version",
          "product_ids": [
            "5"
          ],
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/"
        },
        {
          "category": "workaround",
          "details": "Restrict access to project files on the engineering station to trusted users",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        },
        {
          "category": "workaround",
          "details": "Only use project files from trusted sources",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "title": "CVE-2021-31893"
    }
  ]
}