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CVE-2019-1955

Estado: ModificadaAlta (7.5)—

A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking mechanisms for certain SPF messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. A successful exploit could allow the attacker to bypass the header filters that are configured for the affected device, which could allow malicious content to pass through the device.

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)

Cisco — Email Security Appliance Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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              "exploitation": "none"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-11-19T17:23:30.508409Z"
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          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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  "published": "2019-08-08T08:15:12.537",
  "references": [
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  "descriptions": [
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      "lang": "en",
      "value": "A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking mechanisms for certain SPF messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. A successful exploit could allow the attacker to bypass the header filters that are configured for the affected device, which could allow malicious content to pass through the device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la funcionalidad Sender Policy Framework (SPF) del software AsyncOS de Cisco para Email Security Appliances (ESA) de Cisco, podría permitir a un atacante remoto no autenticado omitir los filtros de usuario configurados en el dispositivo. La vulnerabilidad es debido a mecanismos de entrada y comprobación de validación incompletos para ciertos mensajes SPF que se envían a un dispositivo afectado. Un atacante podría explotar esta vulnerabilidad enviando un paquete SPF personalizado hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante omitir los filtros de encabezado que están configurados para el dispositivo afectado, lo que podría permitir que el contenido malicioso pase a través del dispositivo."
    }
  ],
  "lastModified": "2026-06-17T02:29:41.203",
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