SSA-313313

Vulnerability from csaf_siemens - Published: 2022-10-11 00:00 - Updated: 2023-02-14 00:00
Summary
SSA-313313: Denial of Service Vulnerability in the FTP Server of Nucleus RTOS

Notes

Summary
The FTP server of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) does not properly release memory resources that were reserved for incomplete connection attempts by FTP clients. This could allow a remote attacker to generate a denial of service condition on devices that incorporate a vulnerable version of the FTP server. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens is preparing further updates and 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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{
  "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": "The FTP server of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) does not properly release memory resources that were reserved for incomplete connection attempts by FTP clients. This could allow a remote attacker to generate a denial of service condition on devices that incorporate a vulnerable version of the FTP server.\n\nSiemens has released updates for several affected products and recommends to update to the latest versions. Siemens is preparing further updates and 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"
      },
      {
        "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-313313: Denial of Service Vulnerability in the FTP Server of Nucleus RTOS - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-313313.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-313313: Denial of Service Vulnerability in the FTP Server of Nucleus RTOS - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-313313.txt"
      },
      {
        "category": "self",
        "summary": "SSA-313313: Denial of Service Vulnerability in the FTP Server of Nucleus RTOS - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-313313.json"
      }
    ],
    "title": "SSA-313313: Denial of Service Vulnerability in the FTP Server of Nucleus RTOS",
    "tracking": {
      "current_release_date": "2023-02-14T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-313313",
      "initial_release_date": "2022-10-11T00:00:00Z",
      "revision_history": [
        {
          "date": "2022-10-11T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2022-12-13T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added specific mitigation"
        },
        {
          "date": "2023-02-14T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Added fix for Nucleus NET in Nucleus PLUS V1, V2, and for Nucleus ReadyStart V2012"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.2a",
                "product": {
                  "name": "Nucleus NET for Nucleus PLUS V1",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus NET for Nucleus PLUS V1"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V5.4",
                "product": {
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                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus NET for Nucleus PLUS V2"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2012.08.1",
                "product": {
                  "name": "Nucleus ReadyStart V3 V2012",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus ReadyStart V3 V2012"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2017.02.4",
                "product": {
                  "name": "Nucleus ReadyStart V3 V2017",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus ReadyStart V3 V2017"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Versions including affected FTP server",
                "product": {
                  "name": "Nucleus Source Code",
                  "product_id": "5"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus Source Code"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-38371",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The FTP server does not properly release memory resources that were reserved for incomplete connection attempts by FTP clients. This could allow a remote attacker to generate a denial of service condition on devices that incorporate a vulnerable version of the FTP server.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Configure \nTCP_MAX_KEEPALIVES to a lower value such as 3. Additionally, configure TCP_KEEPALIVE_INTERVAL and TCP_KEEPALIVE_DELAY be set to 3 seconds. Rebuild your application.",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Contact customer support to receive patch and update information",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2012.08.1 and apply the patch \"v2022.11\"",
          "product_ids": [
            "3"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.4 and apply the patch \"2017.02.4_patch_CVE-2022-38371\"",
          "product_ids": [
            "4"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.2a as available in Nucleus PLUS V1.15 and apply the patch \"v2022.11\"",
          "product_ids": [
            "1"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/852852095/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.4 as available in Nucleus PLUS V2.1f and apply the patch \"v2022.11\"",
          "product_ids": [
            "2"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/852852095/"
        }
      ],
      "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"
          ]
        }
      ],
      "title": "CVE-2022-38371"
    }
  ]
}


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  • 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.
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  • 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.