{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERTVDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "Improper buffer restrictions in the webserver used in SIMA\u00b2 Master Station software versions \u003c V 2.6 may allow an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "The webserver component of the automation runtime used implements insufficient checks on handling file uploads. This implementation could result in a memory violation, which in turn affects the stability of automation runtime.\nAn attacker could leverage this vulnerability to potentially cause a denial of service of the device.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "AUMA recommends the following specific workarounds and mitigations: The access to the SIMA\u00b2 should be restricted to legitimate network partners, using e.g. a sufficient firewall setup and robust network segmentation. In general, AUMA recommends implementing the Product Security Guideline for uses on Cybersecurity for the SIMA\u00b2 Master Station.",
        "title": "Mitigation"
      },
      {
        "category": "description",
        "text": "The described vulnerabilities have been fixed in the product versions with software version V 2.6 or higher. SIMA\u00b2 Master Stations with software versions \u003c V 2.6 can be upgraded. AUMA recommends applying a product update at the earliest convenience",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@auma.com",
      "name": "AUMA Riester GmbH \u0026 Co. KG",
      "namespace": "https://auma.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "VDE-2022-024: Auma: SIMA\u00b2 Master Station Denial of Service Vulnerability on Automation Runtime Webserver - HTML",
        "url": "https://certvde.com/de/advisories/VDE-2022-024/"
      },
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for AUMA Riester GmbH \u0026 Co. KG",
        "url": "https://certvde.com/en/advisories/vendor/auma/"
      },
      {
        "category": "self",
        "summary": "VDE-2022-024: Auma: SIMA\u00b2 Master Station Denial of Service Vulnerability on Automation Runtime Webserver - CSAF",
        "url": "https://auma.csaf-tp.certvde.com/.well-known/csaf/white/2022/vde-2022-024.json"
      }
    ],
    "title": "Auma: SIMA\u00b2 Master Station Denial of Service Vulnerability on Automation Runtime Webserver",
    "tracking": {
      "aliases": [
        "VDE-2022-024"
      ],
      "current_release_date": "2025-05-14T13:00:15.000Z",
      "generator": {
        "date": "2025-03-19T15:02:36.926Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.5.21"
        }
      },
      "id": "VDE-2022-024",
      "initial_release_date": "2022-06-15T10:00:00.000Z",
      "revision_history": [
        {
          "date": "2022-06-15T10:00:00.000Z",
          "number": "1",
          "summary": "initial revision"
        },
        {
          "date": "2025-05-14T13:00:15.000Z",
          "number": "2",
          "summary": "Fix: added distribution"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "SIMA\u00b2 Master Station",
                "product": {
                  "name": "SIMA\u00b2 Master Station",
                  "product_id": "CSAFPID-11001"
                }
              }
            ],
            "category": "product_family",
            "name": "Hardware"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cv2.6",
                "product": {
                  "name": "Firmware \u003cv2.6",
                  "product_id": "CSAFPID-21001"
                }
              },
              {
                "category": "product_version",
                "name": "v2.6",
                "product": {
                  "name": "Firmware v2.6",
                  "product_id": "CSAFPID-22001"
                }
              }
            ],
            "category": "product_family",
            "name": "Firmware"
          }
        ],
        "category": "vendor",
        "name": "AUMA Riester GmbH \u0026 Co. KG"
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003cv2.6 installed on SIMA\u00b2 Master Station",
          "product_id": "CSAFPID-31001"
        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware v2.6 installed on SIMA\u00b2 Master Station",
          "product_id": "CSAFPID-32001"
        },
        "product_reference": "CSAFPID-22001",
        "relates_to_product_reference": "CSAFPID-11001"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-22275",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Buffer Overflow vulnerability in B\u0026R Automation Runtime webserver allows an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service."
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-32001"
        ],
        "known_affected": [
          "CSAFPID-31001"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "AUMA recommends the following specific workarounds and mitigations:\n\nThe access to the SIMA\u00b2 should be restricted to legitimate network partners, using e.g. a sufficient firewall setup and robust network segmentation.\nIn general, AUMA recommends implementing the Product Security Guideline for uses on Cybersecurity for the SIMA\u00b2 Master Station.",
          "product_ids": [
            "CSAFPID-31001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "The described vulnerabilities have been fixed in the product versions with software version V 2.6 or\nhigher. SIMA\u00b2 Master Stations with software versions \u003c V 2.6 can be upgraded. AUMA recommends applying a product update at the earliest convenience",
          "product_ids": [
            "CSAFPID-31001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalScore": 8.6,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "temporalScore": 8.6,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001"
          ]
        }
      ],
      "title": "CVE-2021-22275"
    }
  ]
}