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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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Title: Sandboxie de sandboxie-plus, Description: 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.
New CVE Received from GitHub, Inc.5/05/2026 4:16:37 PM
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Description
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.