{
  "document": {
    "title": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices",
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "publisher": {
      "name": "Siemens ProductCERT",
      "contact_details": "productcert@siemens.com",
      "category": "vendor",
      "namespace": "https://www.siemens.com"
    },
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "tracking": {
      "id": "SSA-541017",
      "status": "final",
      "version": "4",
      "revision_history": [
        {
          "number": "1",
          "legacy_version": "1.0",
          "date": "2020-12-08T00:00:00Z",
          "summary": "Publication Date"
        },
        {
          "number": "2",
          "legacy_version": "1.1",
          "date": "2021-02-09T00:00:00Z",
          "summary": "Added additional affected products (SENTRON PAC2200, PAC3200T, 3VA COM100/800, 3VA DSP800) and related fix release information"
        },
        {
          "number": "3",
          "legacy_version": "1.2",
          "date": "2021-03-09T00:00:00Z",
          "summary": "Added solution for SIRIUS 3RW5 communication module Modbus TCP; added reference to additional AMNESIA:33 advisory (SSA-541018)"
        },
        {
          "number": "4",
          "legacy_version": "1.3",
          "date": "2021-04-13T00:00:00Z",
          "summary": "Added download link for SENTRON PAC3200T"
        }
      ],
      "initial_release_date": "2020-12-08T00:00:00Z",
      "current_release_date": "2021-04-13T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      }
    },
    "notes": [
      {
        "title": "Summary",
        "category": "summary",
        "text": "Security researchers discovered and disclosed 33 vulnerabilities in several open-source TCP/IP stacks for embedded devices, also known as \"AMNESIA:33\" vulnerabilities.\n\nThis advisory describes the impact of one of these vulnerabilities (CVE-2020-13988) to Siemens products. Siemens has released updates for the affected products and recommends to update to the latest versions.\n\nThe impact of additional \"AMNESIA:33\" vulnerabilities is described in Siemens Security Advisory SSA-541018."
      },
      {
        "title": "General Recommendations",
        "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' 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": "Additional Resources",
        "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": "Terms of Use",
        "category": "legal_disclaimer",
        "text": "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."
      }
    ],
    "references": [
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-541017.pdf",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - PDF Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-541017.txt",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - TXT Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-541017.json",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - CSAF Version"
      }
    ],
    "acknowledgments": [
      {
        "names": [
          "Jos Wetzels",
          "Stanislav Dashevskyi",
          "Amine Amri",
          "Daniel dos Santos"
        ],
        "organization": "Forescout Technologies",
        "summary": "coordinated disclosure"
      },
      {
        "organization": "Cybersecurity and Infrastructure Security Agency (CISA)",
        "summary": "coordination efforts"
      },
      {
        "organization": "CERT Coordination Center (CERT/CC)",
        "summary": "coordination efforts"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "name": "Siemens",
        "category": "vendor",
        "branches": [
          {
            "name": "SENTRON 3VA COM100/800",
            "category": "product_name",
            "branches": [
              {
                "name": "< V4.2",
                "category": "product_version_range",
                "product": {
                  "product_id": "1",
                  "name": "SENTRON 3VA COM100/800"
                }
              }
            ]
          },
          {
            "name": "SENTRON 3VA DSP800",
            "category": "product_name",
            "branches": [
              {
                "name": "< V2.0",
                "category": "product_version_range",
                "product": {
                  "product_id": "2",
                  "name": "SENTRON 3VA DSP800"
                }
              }
            ]
          },
          {
            "name": "SENTRON PAC2200 (without MID Approval)",
            "category": "product_name",
            "branches": [
              {
                "name": "< V3.0.5",
                "category": "product_version_range",
                "product": {
                  "product_id": "3",
                  "name": "SENTRON PAC2200 (without MID Approval)"
                }
              }
            ]
          },
          {
            "name": "SENTRON PAC3200",
            "category": "product_name",
            "branches": [
              {
                "name": "< V2.4.5",
                "category": "product_version_range",
                "product": {
                  "product_id": "4",
                  "name": "SENTRON PAC3200"
                }
              }
            ]
          },
          {
            "name": "SENTRON PAC3200T",
            "category": "product_name",
            "branches": [
              {
                "name": "< V3.0.5",
                "category": "product_version_range",
                "product": {
                  "product_id": "5",
                  "name": "SENTRON PAC3200T"
                }
              }
            ]
          },
          {
            "name": "SENTRON PAC4200",
            "category": "product_name",
            "branches": [
              {
                "name": "< V2.0.1",
                "category": "product_version_range",
                "product": {
                  "product_id": "6",
                  "name": "SENTRON PAC4200"
                }
              }
            ]
          },
          {
            "name": "SIRIUS 3RW5 communication module Modbus TCP",
            "category": "product_name",
            "branches": [
              {
                "name": "< V1.1.1",
                "category": "product_version_range",
                "product": {
                  "product_id": "7",
                  "name": "SIRIUS 3RW5 communication module Modbus TCP"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "title": "CVE-2020-13988",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "The TCP/IP stack (uIP) in affected devices is vulnerable to integer overflow when processing TCP Maximum Segment Size (MSS) options. (FSCT-2020-0008)\n\nAn attacker located in the same network could trigger a Denial-of-Service condition on the device by sending a specially crafted IP packet."
        }
      ],
      "cve": "CVE-2020-13988",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1"
          ],
          "category": "vendor_fix",
          "details": "Update to V4.2 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109765343/"
        },
        {
          "product_ids": [
            "2"
          ],
          "category": "vendor_fix",
          "details": "Update to V2.0 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109761031/"
        },
        {
          "product_ids": [
            "3"
          ],
          "category": "vendor_fix",
          "details": "Update to V3.0.5 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109760897/"
        },
        {
          "product_ids": [
            "4"
          ],
          "category": "vendor_fix",
          "details": "Update to V2.4.5 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/31674577/"
        },
        {
          "product_ids": [
            "5"
          ],
          "category": "vendor_fix",
          "details": "Update to V3.0.5 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793060/"
        },
        {
          "product_ids": [
            "6"
          ],
          "category": "vendor_fix",
          "details": "Update to V2.0.1 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/35029840/"
        },
        {
          "product_ids": [
            "7"
          ],
          "category": "vendor_fix",
          "details": "Update to V1.1.1 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759671/"
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7"
          ],
          "category": "mitigation",
          "details": "For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access."
        }
      ],
      "references": [
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109765343/",
          "summary": "CVE-2020-13988 - SENTRON 3VA COM100/800"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109761031/",
          "summary": "CVE-2020-13988 - SENTRON 3VA DSP800"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109760897/",
          "summary": "CVE-2020-13988 - SENTRON PAC2200 (without MID Approval)"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/31674577/",
          "summary": "CVE-2020-13988 - SENTRON PAC3200"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793060/",
          "summary": "CVE-2020-13988 - SENTRON PAC3200T"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/35029840/",
          "summary": "CVE-2020-13988 - SENTRON PAC4200"
        },
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759671/",
          "summary": "CVE-2020-13988 - SIRIUS 3RW5 communication module Modbus TCP"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-13988.json",
          "summary": "CVE-2020-13988 Mitre 5.0 json"
        }
      ]
    }
  ]
}