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CVE-2018-0384

Status: ModifiedMedium (5.8)—

A vulnerability in the detection engine of Cisco FireSIGHT System Software could allow an unauthenticated, remote attacker to bypass a URL-based access control policy that is configured to block traffic for an affected system. The vulnerability exists because the affected software incorrectly handles TCP packets that are received out of order when a TCP SYN retransmission is issued. An attacker could exploit this vulnerability by sending a maliciously crafted connection through an affected device. A successful exploit could allow the attacker to bypass a URL-based access control policy that is configured to block traffic for the affected system. Cisco Bug IDs: CSCvh84511.

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 (1)

Cisco — Secure Firewall Management Center

CWEs

References

Raw JSON (NVD)

Show
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      "value": "A vulnerability in the detection engine of Cisco FireSIGHT System Software could allow an unauthenticated, remote attacker to bypass a URL-based access control policy that is configured to block traffic for an affected system. The vulnerability exists because the affected software incorrectly handles TCP packets that are received out of order when a TCP SYN retransmission is issued. An attacker could exploit this vulnerability by sending a maliciously crafted connection through an affected device. A successful exploit could allow the attacker to bypass a URL-based access control policy that is configured to block traffic for the affected system. Cisco Bug IDs: CSCvh84511."
    },
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      "value": "Una vulnerabilidad en el motor de detección de Cisco Firepower System Software podría permitir que un atacante remoto sin autenticar omita una política de control de acceso basada en URL que está configurada para bloquear el tráfico para un sistema afectado. La vulnerabilidad existe debido a que el software afectado gestiona incorrectamente los paquetes TCP que se reciben fuera de orden cuando se lanza una retransmisión TCP SYN. Un atacante podría explotar esta vulnerabilidad enviando una conexión maliciosamente manipulada a través de un dispositivo afectado. Un exploit exitoso podría permitir que el atacante omita una política de control de acceso basada en URL que está configurada para bloquear el tráfico para un sistema afectado. Cisco Bug IDs: CSCvh84511."
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  "lastModified": "2026-06-17T01:30:38.650",
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