CVE-2020-10933

An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.

An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.

Se descubrió un problema en Ruby versiones 2.5.x hasta 2.5.7, versiones 2.6.x hasta 2.6.5, y versión 2.7.0. Si una víctima llama a BasicSocket#read_nonblock(requested_size, buffer, exception: false), el método redimensiona el buffer para ajustarlo al tamaño requerido, pero ningún dato es copiado. Por lo tanto, la cadena del búfer proporciona el valor previo de la pila. Esto puede exponer datos posiblemente confidenciales del intérprete.