icsa-20-343-05
Vulnerability from csaf_cisa
Published
2020-12-08 00:00
Modified
2021-04-13 00:00
Summary
Siemens Embedded TCP/IP Stack Vulnerabilities-AMNESIA:33 (Update C)

Notes

CISA Disclaimer
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.
Risk evaluation
Successful exploitation of this vulnerability could cause a denial-of-service condition.
Critical infrastructure sectors
Energy
Countries/areas deployed
Worldwide
Company headquarters location
Germany
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
Recommended Practices
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage onus-cert.cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Recommended Practices
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Exploitability
No known public exploits specifically target this vulnerability.


To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Daniel dos Santos",
          "Stanislav Dashevskyi",
          "Jos Wetzels",
          "Amine Amri"
        ],
        "organization": "Forescout Research Labs",
        "summary": "reporting this vulnerability to CISA"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://us-cert.cisa.gov/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov",
        "title": "CISA Disclaimer"
      },
      {
        "category": "legal_disclaimer",
        "text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
        "title": "Legal Notice"
      },
      {
        "category": "summary",
        "text": "Successful exploitation of this vulnerability could cause a denial-of-service condition.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Energy",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Germany",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.\nCISA also provides a section for control systems security recommended practices on the ICS webpage onus-cert.cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.\nOrganizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "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": "other",
        "text": "No known public exploits specifically target this vulnerability.",
        "title": "Exploitability"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "Email: CISAservicedesk@cisa.dhs.gov;\n Toll Free: 1-888-282-0870",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "external",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-541017.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-20-343-05 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2020/icsa-20-343-05.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-20-343-05 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-05"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B"
      },
      {
        "category": "external",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-541017.pdf"
      },
      {
        "category": "external",
        "summary": "SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-541017.txt"
      }
    ],
    "title": "Siemens Embedded TCP/IP Stack Vulnerabilities-AMNESIA:33 (Update C)",
    "tracking": {
      "current_release_date": "2021-04-13T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-20-343-05",
      "initial_release_date": "2020-12-08T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2020-12-08T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-20-343-05 Siemens Embedded TCP/IP Stack Vulnerabilities AMNESIA33"
        },
        {
          "date": "2021-02-09T00:00:00.000000Z",
          "legacy_version": "A",
          "number": "2",
          "summary": "ICSA-20-343-05 Siemens Embedded TCP-IP Stack Vulnerabilities\u2013AMNESIA33 (Update A)"
        },
        {
          "date": "2021-03-09T00:00:00.000000Z",
          "legacy_version": "B",
          "number": "3",
          "summary": "ICSA-20-343-05 Siemens Embedded TCP-IP Stack Vulnerabilities\u2013AMNESIA:33 (Update B)"
        },
        {
          "date": "2021-04-13T00:00:00.000000Z",
          "legacy_version": "C",
          "number": "4",
          "summary": "ICSA-20-343-05 Siemens Embedded TCP-IP Stack Vulnerabilities AMNESIA33 (Update C)"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V4.2",
                "product": {
                  "name": "SENTRON 3VA COM100/800",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON 3VA COM100/800"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2.0",
                "product": {
                  "name": "SENTRON 3VA DSP800",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON 3VA DSP800"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V3.0.5",
                "product": {
                  "name": "SENTRON PAC2200 (without MID Approval)",
                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON PAC2200 (without MID Approval)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2.4.5",
                "product": {
                  "name": "SENTRON PAC3200",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON PAC3200"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V3.0.5",
                "product": {
                  "name": "SENTRON PAC3200T",
                  "product_id": "CSAFPID-0005"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON PAC3200T"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2.0.1",
                "product": {
                  "name": "SENTRON PAC4200",
                  "product_id": "CSAFPID-0006"
                }
              }
            ],
            "category": "product_name",
            "name": "SENTRON PAC4200"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V1.1.1",
                "product": {
                  "name": "SIRIUS 3RW5 communication module Modbus TCP",
                  "product_id": "CSAFPID-0007"
                }
              }
            ],
            "category": "product_name",
            "name": "SIRIUS 3RW5 communication module Modbus TCP"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-13988",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "notes": [
        {
          "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.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006",
          "CSAFPID-0007"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-13988 - SENTRON 3VA COM100/800",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109765343/"
        },
        {
          "summary": "CVE-2020-13988 - SENTRON 3VA DSP800",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109761031/"
        },
        {
          "summary": "CVE-2020-13988 - SENTRON PAC2200 (without MID Approval)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109760897/"
        },
        {
          "summary": "CVE-2020-13988 - SENTRON PAC3200",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/31674577/"
        },
        {
          "summary": "CVE-2020-13988 - SENTRON PAC3200T",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793060/"
        },
        {
          "summary": "CVE-2020-13988 - SENTRON PAC4200",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/35029840/"
        },
        {
          "summary": "CVE-2020-13988 - SIRIUS 3RW5 communication module Modbus TCP",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759671/"
        },
        {
          "summary": "CVE-2020-13988 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-13988.json"
        },
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-13988"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V4.2 or later version",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109765343/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.0 or later version",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109761031/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.0.5 or later version",
          "product_ids": [
            "CSAFPID-0003"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109760897/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.4.5 or later version",
          "product_ids": [
            "CSAFPID-0004"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/31674577/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.0.5 or later version",
          "product_ids": [
            "CSAFPID-0005"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109793060/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2.0.1 or later version",
          "product_ids": [
            "CSAFPID-0006"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/35029840/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V1.1.1 or later version",
          "product_ids": [
            "CSAFPID-0007"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109759671/"
        },
        {
          "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.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        },
        {
          "category": "mitigation",
          "details": "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",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ],
      "title": "CVE-2020-13988"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.