Bugtraq mailing list archives
Re: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices
From: Casper Dik <casper () holland sun com>
Date: Sat, 15 May 2004 20:35:24 +0200
An attack against this vulnerability exploits the CCA function at the physical layer and causes all WLAN nodes within range, both clients and access points (AP), to defer transmission of data for the duration of the attack. When under attack, the device behaves as if the channel is always busy, preventing the transmission of any data over the wireless network. Previously, attacks against the availability of IEEE 802.11 networks have required specialised hardware and relied on the ability to saturate the wireless frequency with high-power radiation, an avenue not open to discreet attack. This vulnerability makes a successful, low cost attack against a wireless network feasible for a semi-skilled attacker.
In last year's Usenix security symposium an attack which looked very much like one in the first paragraph was performed agains tthe audience (immediate linkloss was the result of the presenter pressing a button on his laptop). This was with with plain COTS components, so what is different with this attack or is it the same attack rediscovered? I don't remember it getting any press. Casper
Current thread:
- Denial of Service Vulnerability in IEEE 802.11 Wireless Devices albatross (May 15)
- Re: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices Casper Dik (May 15)
- Re[2]: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices Jason Ostrom (May 17)
- Re: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices Niels Bakker (May 17)
- Re[2]: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices Jason Ostrom (May 17)
- Re: Denial of Service Vulnerability in IEEE 802.11 Wireless Devices Casper Dik (May 15)