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CVE-2023-39350

Status: ModifiedHigh (7.5)—

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. This issue affects Clients only. Integer underflow leading to DOS (e.g. abort due to `WINPR_ASSERT` with default compilation flags). When an insufficient blockLen is provided, and proper length validation is not performed, an Integer Underflow occurs, leading to a Denial of Service (DOS) vulnerability. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Debian — Debian LinuxFedoraproject — FedoraFreerdp — Freerdp

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2023-39350",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "source": "security-advisories@github.com",
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          "version": "3.1",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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      "description": [
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          "value": "CWE-191"
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      "value": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. This issue affects Clients only. Integer underflow leading to DOS (e.g. abort due to `WINPR_ASSERT` with default compilation flags). When an insufficient blockLen is provided, and proper length validation is not performed, an Integer Underflow occurs, leading to a Denial of Service (DOS) vulnerability. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "FreeRDP es una implementación libre del Protocolo de Escritorio Remoto (RDP), publicado bajo la licencia Apache. Este problema afecta sólo a los clientes. Desbordamiento incompleto de enteros que conduce al DOS (por ejemplo, aborto debido a `WINPR_ASSERT` con los indicadores de compilación predeterminados). Cuando se proporciona un blockLen insuficiente y no se realiza la validación de longitud adecuada, se produce un desbordamiento de enteros, lo que provoca una vulnerabilidad de denegación de servicio (DOS). Este problema se ha solucionado en las versiones 2.11.0 y 3.0.0-beta3. Se recomienda a los usuarios que actualicen. No se conocen soluciones para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T06:12:07.087",
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