CVE-2026-34459

Estado: AnalizadaAlta (8.8)—

Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieSvc proxy service's GetRawInputDeviceInfoSlave handler contains two vulnerabilities that can be chained for sandbox escape. First, when a sandboxed process sends an IPC request with cbSize set to 0, up to 32KB of uninitialized stack memory from the service process is returned, leaking return addresses and stack cookies which bypass ASLR and /GS protections.

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Second, the handler performs a memcpy with an attacker-controlled length without verifying it fits within the 32KB stack buffer, enabling a stack buffer overflow. By chaining the information leak with the overflow, a sandboxed process can execute a ROP chain to achieve SYSTEM privilege escalation, even from a Security Hardened Sandbox. Hardware-enforced shadow stacks (Intel CET) prevent the ROP chain execution but do not mitigate the information leak. This issue has been fixed in version 1.17.3.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 8.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Impacto principalT1059 Command and Scripting Interpreterexecution90 %
Impacto secundarioT1548.004 Elevated Execution with Promptprivilege escalation85 %

Acceso local (AV:L) sin interacción del usuario permite escalada de privilegios mediante buffer overflow en servicio SYSTEM; consigue ejecución de código arbitrario y privilegios SYSTEM.

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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Sandboxie-plus — Sandboxie

CWE

CWE-121

Referencias

JSON original (NVD)

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      "value": "Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieSvc proxy service's GetRawInputDeviceInfoSlave handler contains two vulnerabilities that can be chained for sandbox escape. First, when a sandboxed process sends an IPC request with cbSize set to 0, up to 32KB of uninitialized stack memory from the service process is returned, leaking return addresses and stack cookies which bypass ASLR and /GS protections. Second, the handler performs a memcpy with an attacker-controlled length without verifying it fits within the 32KB stack buffer, enabling a stack buffer overflow. By chaining the information leak with the overflow, a sandboxed process can execute a ROP chain to achieve SYSTEM privilege escalation, even from a Security Hardened Sandbox. Hardware-enforced shadow stacks (Intel CET) prevent the ROP chain execution but do not mitigate the information leak. This issue has been fixed in version 1.17.3."
    },
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      "value": "Sandboxie-Plus es un software de aislamiento de código abierto basado en sandbox para Windows. En las versiones 1.17.2 y anteriores, el gestor GetRawInputDeviceInfoSlave del servicio proxy SbieSvc contiene dos vulnerabilidades que pueden encadenarse para un escape de sandbox. Primero, cuando un proceso en sandbox envía una solicitud IPC con cbSize establecido en 0, se devuelven hasta 32KB de memoria de pila no inicializada del proceso de servicio, filtrando direcciones de retorno y cookies de pila que eluden las protecciones ASLR y /GS. Segundo, el gestor realiza un memcpy con una longitud controlada por el atacante sin verificar que encaje dentro del búfer de pila de 32KB, lo que permite un desbordamiento de búfer de pila. Al encadenar la fuga de información con el desbordamiento, un proceso en sandbox puede ejecutar una cadena ROP para lograr una escalada de privilegios SYSTEM, incluso desde un Sandbox Reforzado de Seguridad. Las pilas en sombra impuestas por hardware (Intel CET) evitan la ejecución de la cadena ROP pero no mitigan la fuga de información. Este problema ha sido solucionado en la versión 1.17.3."
    }
  ],
  "lastModified": "2026-07-24T22:10:00.140",
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