SSA-549234

Vulnerability from csaf_siemens - Published: 2021-09-14 00:00 - Updated: 2023-04-11 00:00
Summary
SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules

Notes

Summary
A denial of service vulnerability was identified in different types of Communication Processors. An attacker could exploit this vulnerability causing the device to become un-operational until the device is restarted. 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.
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "A denial of service vulnerability was identified in different types of Communication Processors. An attacker could exploit this vulnerability causing the device to become un-operational until the device is restarted.\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"
      },
      {
        "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-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-549234.html"
      },
      {
        "category": "self",
        "summary": "SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-549234.json"
      },
      {
        "category": "self",
        "summary": "SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-549234.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-549234.txt"
      }
    ],
    "title": "SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules",
    "tracking": {
      "current_release_date": "2023-04-11T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-549234",
      "initial_release_date": "2021-09-14T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-09-14T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2021-12-14T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Specifically added that SIMATIC CP 343-1 devices do not have any fix planned"
        },
        {
          "date": "2022-06-14T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Specifically added that SIMATIC CP 443-1 Advanced devices do not have any fix planned"
        },
        {
          "date": "2023-04-11T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "Added fix for SIMATIC CP 443-1 and CP 443-1 Advanced"
        }
      ],
      "status": "interim",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC CP 343-1 (incl. SIPLUS variants)",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 343-1 (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)",
                  "product_id": "3",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7343-1FX00-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "SIMATIC CP 343-1 Lean (incl. SIPLUS variants)",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 343-1 Lean (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.3",
                "product": {
                  "name": "SIMATIC CP 443-1 (6GK7443-1EX30-0XE0)",
                  "product_id": "5",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7443-1EX30-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 443-1 (6GK7443-1EX30-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.3",
                "product": {
                  "name": "SIMATIC CP 443-1 (6GK7443-1EX30-0XE1)",
                  "product_id": "6",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7443-1EX30-0XE1"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 443-1 (6GK7443-1EX30-0XE1)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.3",
                "product": {
                  "name": "SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)",
                  "product_id": "7",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6GK7443-1GX30-0XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.3",
                "product": {
                  "name": "SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)",
                  "product_id": "8",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG1443-1EX30-4XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/\u003cV3.3",
                "product": {
                  "name": "SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)",
                  "product_id": "9",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG1443-1GX30-4XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-33737",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Limit access to port 102/tcp to trusted users and systems only",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "1",
            "2",
            "3",
            "4"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.3 or later version",
          "product_ids": [
            "5",
            "6",
            "7",
            "8",
            "9"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109817938/"
        }
      ],
      "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:U/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9"
          ]
        }
      ],
      "title": "CVE-2021-33737"
    }
  ]
}


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 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.