ssa-274900
Vulnerability from csaf_siemens
Published
2021-01-12 00:00
Modified
2022-12-13 00:00
Summary
SSA-274900: Use of Hardcoded Key in SCALANCE X Devices Under Certain Conditions

Notes

Summary
SCALANCE X devices might not generate a unique random key after factory reset, and use a private key shipped with the firmware. Siemens has released updates 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
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. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "SCALANCE X devices might not generate a unique random key\nafter factory reset, and use a private key shipped with the firmware.\n\nSiemens has released updates 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: \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-274900: Use of Hardcoded Key in SCALANCE X Devices Under Certain Conditions - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-274900: Use of Hardcoded Key in SCALANCE X Devices Under Certain Conditions - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-274900.txt"
      },
      {
        "category": "self",
        "summary": "SSA-274900: Use of Hardcoded Key in SCALANCE X Devices Under Certain Conditions - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-274900.json"
      }
    ],
    "title": "SSA-274900: Use of Hardcoded Key in SCALANCE X Devices Under Certain Conditions",
    "tracking": {
      "current_release_date": "2022-12-13T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-274900",
      "initial_release_date": "2021-01-12T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-01-12T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2021-02-09T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added update information for SCALANCE X-200IRT switch family"
        },
        {
          "date": "2021-09-14T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Added solution for SCALANCE X-200 switch family"
        },
        {
          "date": "2022-12-13T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "Added SCALANCE X-200RNA switch family"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.2.5",
                "product": {
                  "name": "SCALANCE X-200 switch family (incl. SIPLUS NET variants)",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SCALANCE X-200 switch family (incl. SIPLUS NET variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.5.0",
                "product": {
                  "name": "SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V3.2.7",
                "product": {
                  "name": "SCALANCE X-200RNA switch family",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SCALANCE X-200RNA switch family"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V4.1.0",
                "product": {
                  "name": "SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-28391",
      "cwe": {
        "id": "CWE-321",
        "name": "Use of Hard-coded Cryptographic Key"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Devices create a new unique key upon factory reset, except when used\nwith C-PLUG. When used with C-PLUG the devices use the hardcoded private RSA-key\nshipped with the firmware-image. An attacker could leverage this situation to a\nman-in-the-middle situation and decrypt previously captured traffic.\n\n\n",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update the default selfsigned device X.509 certificates with own trusted  certificates",
          "product_ids": [
            "1",
            "2",
            "3"
          ]
        },
        {
          "category": "mitigation",
          "details": "Update the default hardcoded X.509 certificates from the firmware image (fingerprints SHA-1: \nF2:C8:3B:8F:86:27:74:AA:60:EC:D4:A0:CF:0D:BE:A6:D1:FE:22:12 and SHA-256: 25:60:DB:B3: F9:07:9D:69:0E:DD:A9:EB:4E:1C:D5:8E:AF:79:16:C3:C8:13:A6:F6:59:AD:05:E4:6F:77:F7:72 - fingerprints for X-200RNA switch devices SHA-1: 04:64:EF:98:A4:42:D2:BB:57:4A:47:12:20:EC:E6:85:15:4F:03:61 and SHA-256: 9C:15:FA:56:ED:FF:CA:8D:17:16:E9:2C:57:CB:90:3C:4E:81:5B:3D:60:E9:CF:26:07:B3:73:F6:C7:02:75:88)",
          "product_ids": [
            "1",
            "2",
            "3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.2.5 or later version",
          "product_ids": [
            "1"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109801131/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.5.0 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109792534/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.2.7 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109814809/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:U/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "title": "CVE-2020-28391"
    },
    {
      "cve": "CVE-2020-28395",
      "cwe": {
        "id": "CWE-321",
        "name": "Use of Hard-coded Cryptographic Key"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Devices do not create a new unique private key after factory reset.  An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.\n\n\n",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "3",
          "4"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update the default selfsigned device X.509 certificates with own trusted  certificates",
          "product_ids": [
            "3",
            "4"
          ]
        },
        {
          "category": "mitigation",
          "details": "Update the default hardcoded X.509 certificates from the firmware image (fingerprints SHA-1: \nF2:C8:3B:8F:86:27:74:AA:60:EC:D4:A0:CF:0D:BE:A6:D1:FE:22:12 and SHA-256: 25:60:DB:B3: F9:07:9D:69:0E:DD:A9:EB:4E:1C:D5:8E:AF:79:16:C3:C8:13:A6:F6:59:AD:05:E4:6F:77:F7:72 - fingerprints for X-200RNA switch devices SHA-1: 04:64:EF:98:A4:42:D2:BB:57:4A:47:12:20:EC:E6:85:15:4F:03:61 and SHA-256: 9C:15:FA:56:ED:FF:CA:8D:17:16:E9:2C:57:CB:90:3C:4E:81:5B:3D:60:E9:CF:26:07:B3:73:F6:C7:02:75:88)",
          "product_ids": [
            "3",
            "4"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.1.0 or later version (for supported devices)",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773547/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.2.7 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109814809/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:U/RC:C",
            "version": "3.1"
          },
          "products": [
            "3",
            "4"
          ]
        }
      ],
      "title": "CVE-2020-28395"
    }
  ]
}


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