Oh boy, Denial of Service Vulnerability in IEEE 802.11 all Wireless Devices

"A vulnerability exists in hardware implementations of the IEEE 802.11 wireless protocol[1] that allows for a trivial but effective attack against the availability of wireless local area network (WLAN) devices.
An attacker using a low-powered, portable device such as an electronic PDA and a commonly available wireless networking card may cause significant disruption to all WLAN traffic within range, in a manner that makes identification and localisation of the attacker difficult.

The vulnerability is related to the medium access control (MAC) function of the IEEE 802.11 protocol. WLAN devices perform Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA), which minimises the likelihood of two devices transmitting simultaneously. Fundamental to the functioning of CSMA/CA is the Clear Channel Assessment (CCA) procedure, used in all standards-compliant hardware and performed by a Direct Sequence Spread Spectrum (DSSS) physical (PHY) layer."

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