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CVE-2023-40547

Estado: ModificadaAlta (8.3)—

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

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 (2)

Redhat — Enterprise LinuxRedhat — Shim

CWE

Referencias

JSON original (NVD)

Mostrar
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    },
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      "value": "Se encontró una vulnerabilidad de ejecución remota de código en Shim. El soporte de arranque Shim confía en los valores controlados por el atacante al analizar una respuesta HTTP. Este fallo permite a un atacante manipular una solicitud HTTP maliciosa específica, lo que lleva a una escritura fuera de los límites completamente controlada primitiva y a un compromiso completo del sistema."
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