TCP flaw threatens Net data transmissions

A flaw in the most popular communications protocol for sending data on the Net could let attackers shut down connections between servers and routers, according to an advisory released Tuesday by Britain’s national emergency response team.

TCP–the Transmission Control Protocol–contains a flaw that “varies by vendor and application, but in some deployment scenarios…is rated critical,” said the advisory, published by the United Kingdom’s National Infrastructure Security Co-ordination Centre. Networking-hardware maker Juniper Networks has determined that its products are vulnerable. Cisco Systems, Hitachi, NEC, and others are studying the issue, according to the advisory.

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