The Koreans have seven points from three games, while the UAE has lost three straight.
Seo Jung-jin, making his first full appearance for South Korea, threaded a pass through the middle of the UAE defense and Park rolled the ball past the goalkeeper from the edge of the area after 51 minutes.
South Korea extended its lead after 64 minutes as Ismail Hamdan headed a Ki Sung-yung corner into his own net.
Ismai Matar scored from close range in the 92nd minute for the visitors. South Korea travels to UAE for the next match in the group in November.