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CVE-2020-1044

Estado: ModificadaMedia (6.5)—

<p>A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.</p> <p>To exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.</p> <p>The update addresses the vulnerability by modifying how SSRS validates attachment uploads.</p>

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)

Microsoft — SQL Server Reporting Services

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-1044",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Secondary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server_2017_reporting_services:-:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "SQL Server 2017 Reporting Services",
          "versions": [
            {
              "status": "affected",
              "version": "14.0.0",
              "lessThan": "publication",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Unknown"
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        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server_2019_reporting_services:-:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "SQL Server 2019 Reporting Services",
          "versions": [
            {
              "status": "affected",
              "version": "15.0.0",
              "lessThan": "publication",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        }
      ]
    }
  ],
  "published": "2020-09-11T17:15:18.260",
  "references": [
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "<p>A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.</p>\n<p>To exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.</p>\n<p>The update addresses the vulnerability by modifying how SSRS validates attachment uploads.</p>"
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de omisión de la característica de seguridad en SQL Server Reporting Services (SSRS) cuando el servidor comprueba inapropiadamente los archivos adjuntos cargados en los reportes, también se conoce como \"SQL Server Reporting Services Security Feature Bypass Vulnerability\""
    }
  ],
  "lastModified": "2026-06-17T03:00:18.573",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:sql_server_reporting_services:2017:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1A474BD-3D0F-4B62-B64D-4154A72DD160"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:sql_server_reporting_services:2019:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "71090A71-B116-48E2-BB73-D29C8D817E68"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "secure@microsoft.com"
}