An anonymous reader writes: The Steam game distribution platform is suffering from a particularly bad bug right now. If you log in and try to look at your account details, you're shown the details of another user's account — seemingly picked at random. This includes email address, last 4 digits of a phone number, whether SteamGuard (their two-factor authentication) is enabled, and the last 2 digits of an associated credit card. If you play a game, Steam will show you as being logged in as somebody else while in that game. Many users are being shown pages in other languages, as they are mistaken for players in different regions. This bug follows an apparent DDoS attack that took the service down for several hours. The bug doesn't seem to allow people to purchase games using a different account. That's good, though that means most, perhaps all players, are unable to buy games on Christmas during Steam's huge Winter Sale.