With a Raspberry Pi and a cheap WiFi dongle a researcher has shown an effective way to completely block 2.4Ghz transmissions in a 120 metre radius. By disabling the backoff wait time, aka Short Interframe Space (SIFS), which is accomplished by firmware modification the WiFi dongle will continually resend a frame and block any device with a higher bitrate. This will block WiFI, Bluetooth and most IoT devices including security systems. They did not provide the source code used in this procedure, so you won't be able to block your friends for your own amusement but security researchers can reach out to the inventor for access to see if there are ways to circumvent this vulnerability. The story at The Register also has some information on TKIP vulnerabilities and possible ways to block transmissions on the 5GHz band.
"The wireless security boffin presented his work at the BruCon conference last week and revealed his weapon of choice is a bargain WiFi dongle bought off Amazon that, when paired with a Raspberry Pi and a small amplifier, can block 2.4Ghz transmissions for up to 120 metres."
Here is some more Tech News from around the web:
- Microsoft delivers Windows 10 Build 10565 with Skype and Uber integration @ The Inquirer
- The USB Killer, Version 2.0 @ Hack a Day
- Micron pulls up its flash SOCs, slurps up Tidal @ The Register
- Google Cardboard VR gets Street View walkthroughs and updated SDKs @ The Inquirer
- Dell buys out EMC in mega-super-duper $67 BEEELLLION deal @ The Register
- Apple updates iMac line-up with 4K and 5K displays, Skylake processors @ The Inquirer
- Top boffin Freeman Dyson on climate change, interstellar travel, fusion, and more @ The Register
- The Intel Channel Symposium 2015 @ TechARP
LOL, ok I own that little usb
LOL, ok I own that little usb wifi adapter. 3.5 euros from GearBest if I remember correctly the price. Much better than two and much more expensive TP Link models than I own, but for anyone interested, Mediatek messed up with their Windows XP drivers where in fact it doesn’t work(loses the connection after one minute). But it is an excellent little USB receiver for usage under Windows 7 where it works, as I said, much better than the 3-8 times more expensive TP Link adapters.
Mesh net killer?
Mesh net killer?
So, illegal. Got it.
So, illegal. Got it.
I will like 3 of these thank
I will like 3 of these thank you very much, take my money