SSA-113131

Vulnerability from csaf_siemens - Published: 2018-11-13 00:00 - Updated: 2023-05-09 00:00
Summary
SSA-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs

Notes

Summary
Two vulnerabilities have been identified in the SIMATIC S7-400 CPU family that could allow an attacker to cause a denial of service condition. In order to exploit the vulnerabilities, an attacker must have access to the affected devices on port 102/tcp via Ethernet, PROFIBUS or Multi Point Interfaces (MPI). Siemens 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.
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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        "category": "summary",
        "text": "Two vulnerabilities have been identified in the SIMATIC S7-400 CPU family\nthat could allow an attacker to cause a denial of service condition. In order\nto exploit the vulnerabilities, an attacker must have access to the affected\ndevices on port 102/tcp via Ethernet, PROFIBUS or Multi Point Interfaces\n(MPI). \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: \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: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
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        "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",
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    "title": "SSA-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs",
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        },
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-16556",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Specially crafted packets sent to port 102/tcp via Ethernet interface, via\r\nPROFIBUS, or via Multi Point Interfaces (MPI) could cause the affected\r\ndevices to go into defect mode. Manual reboot is required to resume normal\r\noperation.\r\n\r\nSuccessful exploitation requires an attacker to be able to send specially\r\ncrafted packets to port 102/tcp via Ethernet interface, via PROFIBUS or Multi\r\nPoint Interfaces (MPI). No user interaction and no user privileges are\r\nrequired to exploit the security vulnerability. The vulnerability could allow\r\ncausing a denial of service condition of the core functionality of the CPU,\r\ncompromising the availability of the system.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13",
          "14",
          "15",
          "16",
          "17",
          "18",
          "19",
          "20",
          "21"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Restrict network access to affected devices; restrict network access to port 102/tcp for Ethernet interfaces",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21"
          ]
        },
        {
          "category": "mitigation",
          "details": "Activate Field Interface Security in PCS 7 V9.0, and use a SIMATIC/SIPLUS CP443-1 Adv. to communicate with ES/OS",
          "product_ids": [
            "17"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "7",
            "8",
            "10",
            "12",
            "14",
            "16",
            "20",
            "21"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V7.0.3 or later version",
          "product_ids": [
            "5",
            "6",
            "9",
            "11",
            "13",
            "18",
            "19"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109752685/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V6.0.9 or later version",
          "product_ids": [
            "15"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109474550/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V8.2.1 or later version",
          "product_ids": [
            "17"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109476571/"
        }
      ],
      "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/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21"
          ]
        }
      ],
      "title": "CVE-2018-16556"
    },
    {
      "cve": "CVE-2018-16557",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Sending of specially crafted packets to port 102/tcp via Ethernet interface\r\nvia PROFIBUS or Multi Point Interfaces (MPI) could cause a denial of service\r\ncondition on affected devices. Flashing with a firmware image may be required\r\nto recover the CPU.\r\n\r\nSuccessful exploitation requires an attacker to have network access to port\r\n102/tcp via Ethernet interface or to be able to send messages via PROFIBUS or\r\nMulti Point Interfaces (MPI) to the device. No user interaction is required.\r\nIf no access protection is configured, no privileges are required to exploit\r\nthe security vulnerability. The vulnerability could allow causing a\r\ndenial of service condition of the core functionality of the CPU,\r\ncompromising the availability of the system.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13",
          "14",
          "15",
          "16",
          "17",
          "18",
          "19",
          "20",
          "21"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "CVE-2018-16557: Configure protection level 3 (read/write protection)",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21"
          ]
        },
        {
          "category": "mitigation",
          "details": "Restrict network access to affected devices; restrict network access to port 102/tcp for Ethernet interfaces",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21"
          ]
        },
        {
          "category": "mitigation",
          "details": "Activate Field Interface Security in PCS 7 V9.0, and use a SIMATIC/SIPLUS CP443-1 Adv. to communicate with ES/OS",
          "product_ids": [
            "17"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "7",
            "8",
            "10",
            "12",
            "14",
            "16",
            "20",
            "21"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V7.0.3 or later version",
          "product_ids": [
            "5",
            "6",
            "9",
            "11",
            "13",
            "18",
            "19"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109752685/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V6.0.9 or later version",
          "product_ids": [
            "15"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109474550/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V8.2.1 or later version",
          "product_ids": [
            "17"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109476571/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13",
            "14",
            "15",
            "16",
            "17",
            "18",
            "19",
            "20",
            "21"
          ]
        }
      ],
      "title": "CVE-2018-16557"
    }
  ]
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.