Cisco Systems' ASA 5500 series is one of many firewalls that drops data packets that contains invalid TCP sequence numbers. The feature can leak data that can be used to hijack connections. Computer scientists have identified a vulnerability in the network of AT&T and at least 47 other cellular carriers that...

<A HREF="http://arstechnica.com/security/2012/05/smartphone-hijacking-on-att-47-other-carriers/">Read More</A>