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CVE-2020-35685

Estado: ModificadaCrítica (9.1)—

An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers (ISNs) for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing ones or spoof future ones. (Proper ISN generation should aim to follow at least the specifications outlined in RFC 6528.)

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 (3)

Hcc-embedded — NichestackSiemens — Sentron 3WA Com190 FirmwareSiemens — Sentron 3WL Com35 Firmware

CWE

Referencias

JSON original (NVD)

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          "authentication": "NONE",
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      "value": "An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers (ISNs) for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing ones or spoof future ones. (Proper ISN generation should aim to follow at least the specifications outlined in RFC 6528.)"
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      "value": "Se ha detectado un problema en HCC Nichestack versión 3.0. El código que genera Initial Sequence Numbers (ISN) para las conexiones TCP deriva el ISN de una fuente insuficientemente aleatoria. Como resultado, un atacante puede ser capaz de determinar el ISN de las conexiones TCP actuales y futuras y secuestrar las existentes o falsificar las futuras. (La generación apropiada del ISN debe tener como objetivo seguir al menos las especificaciones descritas en el RFC 6528)."
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