CVE-2017-15118

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

Se ha detectado una vulnerabilidad de desbordamiento de búfer basado en pila en la implementación de servidor NBD en qemu en versiones anteriores a la 2.11, permitiendo a un cliente solicitar un nombre de exportación de hasta 4096 bytes, que de hecho debería estar limitado a 256 bytes, provocando una escritura de pila fuera de límites en el proceso qemu. Si el servidor NBD requiere TLS, el atacante no puede activar el desbordamiento del búfer sin haber negociado primero con éxito el TLS.