AT&T Glitch Connects Users To Wrong Accounts

CAE guy writes "The Boston Globe is carrying an AP report which begins: 'A Georgia mother and her two daughters logged onto Facebook from mobile phones last weekend and wound up in a startling place: strangers' accounts with full access to troves of private information. The glitch — the result of a routing problem at the family's wireless carrier, AT&T — revealed a little known security flaw with far reaching implications for everyone on the Internet, not just Facebook users.' Who needs to worry about man-in-the-middle attacks when your service provider will hijack your session for you?"

Comments

Re:But... what?

[samkass]

My guess is that it's as simple as this: the http returned by a request to "www.facebook.com" was cached by AT&T and delivered to other users who attempted to fetch that URL in an attempt to save bandwidth. The login credentials are irrelevant... once AT&T cached the page it thought of as "www.facebook.com" it would deliver it to anyone who asked for that URL. It probably only changed for the next person because someone insisted on logging out and back in, and the caching server detected the change then re-cached the NEW user's page.

This used to happen a lot on the internet to unencrypted streams that allowed log-ins. These days most caching servers are properly configured, but it's still an easy mistake to make if you're setting up a caching proxy.