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CVE-2020-25234

Estado: ModificadaAlta (7.7)—

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort (All versions < V8.3). The LOGO! program files generated and used by the affected components offer the possibility to save user-defined functions (UDF) in a password protected way. This protection is implemented in the software that displays the information. An attacker could reverse engineer the UDFs directly from stored program files.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Siemens — Logo! 8 BM Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-25234",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "productcert@siemens.com",
      "affectedData": [
        {
          "vendor": "Siemens",
          "product": "LOGO! 8 BM (incl. SIPLUS variants)",
          "versions": [
            {
              "status": "affected",
              "version": "All versions < V8.3"
            }
          ]
        },
        {
          "vendor": "Siemens",
          "product": "LOGO! Soft Comfort",
          "versions": [
            {
              "status": "affected",
              "version": "All versions < V8.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-12-14T21:15:20.130",
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "productcert@siemens.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "productcert@siemens.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-321"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort (All versions < V8.3). The LOGO! program files generated and used by the affected components offer the possibility to save user-defined functions (UDF) in a password protected way. This protection is implemented in the software that displays the information. An attacker could reverse engineer the UDFs directly from stored program files."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en LOGO!&#xa0;8 BM (incluyendo variantes SIPLUS) (todas las versiones anteriores a V8.3), LOGO!&#xa0;Soft Comfort (todas las versiones anteriores a V8.3). Los archivos de programa de LOGO! generados y utilizados por los componentes afectados ofrecen la posibilidad de guardar funciones definidas por el usuario (UDF) en una forma protegida por contraseña.&#xa0;Esta protección es implementada en el software que muestra la información.&#xa0;Un atacante podría aplicar ingeniería inversa a las UDF directamente desde los archivos de programa almacenados"
    }
  ],
  "lastModified": "2026-06-17T03:06:37.963",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:logo\\!_8_bm_firmware:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2FA7BA89-3BF0-4C68-AC47-951B1F11F96D",
              "versionEndExcluding": "8.3"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:logo\\!_8_bm:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "59947FF6-3711-47C1-B91E-87DBF31DAF57"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "productcert@siemens.com"
}