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CVE-2021-41160

Estado: ModificadaAlta (8.8)—💥 PoC

FreeRDP es una implementación libre del Protocolo de Escritorio Remoto (RDP), publicada bajo la licencia Apache. En las versiones afectadas, un servidor malicioso podría desencadenar escrituras fuera de límites en un cliente conectado. Las conexiones que usan GDI o SurfaceCommands para enviar actualizaciones de gráficos al cliente podrían enviar rectángulos de anchura/altura "0" o fuera de límites para desencadenar escrituras fuera de límites. Con una anchura o altura de "0" la asignación de memoria será "0" pero las comprobaciones de límites faltantes permiten escribir en el puntero en esta región (no asignada). Este problema ha sido parcheado en FreeRDP versión 2.4.1

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (2)

Fedoraproject — FedoraFreerdp — Freerdp

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-41160",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
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        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 0.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
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        "impactScore": 5.9,
        "exploitabilityScore": 2.8
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      "affectedData": [
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          "vendor": "FreeRDP",
          "product": "FreeRDP",
          "versions": [
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              "status": "affected",
              "version": "< 2.4.1"
            }
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        }
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  ],
  "published": "2021-10-21T19:15:07.947",
  "references": [
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      "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7c9r-6r2q-93qg",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send `0` width/height or out of bound rectangles to trigger out of bound writes. With `0` width or heigth the memory allocation will be `0` but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1."
    },
    {
      "lang": "es",
      "value": "FreeRDP es una implementación libre del Protocolo de Escritorio Remoto (RDP), publicada bajo la licencia Apache. En las versiones afectadas, un servidor malicioso podría desencadenar escrituras fuera de límites en un cliente conectado. Las conexiones que usan GDI o SurfaceCommands para enviar actualizaciones de gráficos al cliente podrían enviar rectángulos de anchura/altura \"0\" o fuera de límites para desencadenar escrituras fuera de límites. Con una anchura o altura de \"0\" la asignación de memoria será \"0\" pero las comprobaciones de límites faltantes permiten escribir en el puntero en esta región (no asignada). Este problema ha sido parcheado en FreeRDP versión 2.4.1"
    }
  ],
  "lastModified": "2026-06-17T04:07:59.800",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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              "versionEndExcluding": "2.4.1"
            }
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}