Bears really are showing up more and more often near residential areas, especially in fall when they're looking for food before hibernation - it's a seasonal thing, but in recent years it's become more noticeable in forested regions (the Urals, Siberia, the Far East, mountain areas). It is dangerous, and the main rule is simple: don't approach it, don't feed it, make more noise and get inside or to a safe place quickly if the bear is really close. Make sure your trash is secured, keep your compost pile away from the house, don't leave food on the porch - animals often come to places where it's easy to find a meal. Call emergency services or local hunters if the bear won't leave at all and is acting aggressively - don't try to handle it yourself.