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CVE-2025-7028

Estado: AplazadaAlta (7.8)—

A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad local (AV:L/PR:L) que permite lectura y escritura arbitraria de SMRAM mediante punteros sin validar; acceso a datos de firmware y persistencia mediante implantes.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageExecution PreventionEncrypt Sensitive InformationApplication Isolation and Sandboxing

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-7028",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-7028",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-07-14T16:45:13.338112Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "cret@cert.org",
      "affectedData": [
        {
          "vendor": "GIGABYTE",
          "product": "UEFI-SmiFlash",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-07-11T16:15:27.143",
  "references": [
    {
      "url": "https://kb.cert.org/vuls/id/746790",
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.binarly.io/advisories/brly-dva-2025-010",
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.gigabyte.com/Support/Security",
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.kb.cert.org/vuls/id/746790",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en el controlador Software SMI (SwSmiInputValue 0x20) permite a un atacante local proporcionar un puntero manipulado (FuncBlock) a través de los valores de los registros RBX y RCX. Este puntero se pasa sin control a múltiples funciones de gestión de memoria flash (ReadFlash, WriteFlash, EraseFlash y GetFlashInfo) que desreferencian tanto la estructura como sus miembros anidados, como BufAddr. Esto permite acceso arbitrario de lectura/escritura a la RAM de gestión del sistema (SMRAM), lo que permite a un atacante corromper la memoria del firmware, extraer contenido de la SMRAM a través de la memoria flash o instalar implantes persistentes."
    }
  ],
  "lastModified": "2026-06-17T10:04:07.600",
  "sourceIdentifier": "cret@cert.org"
}