
I RTFA instead of relying on ElReg's interpretation...
the crackers seems to have done two things
the first was simply interecept an unencrypted wireless telephone conversation, not particularly hard with a digital receiver on the right frequency with the right codec
the second was a classic man-in-the-middle attack. basically they created a fake dect "access point" (i.e. a telephone base station) which didn't do encryption or strong authentication, and relied on the handsets to not report this, so that when a call was made they could simply intercept the audio stream.
in both cases, it relies on the designer of the handset and base staton having been lazy - either not actually doing any encryption at all, or being careless with authentication! snag is with any consumer electronics, it's all proprietary stuff with no technical documentation, so we're unlikely to find out until it's too late whether our phones are vulnerable or not.
What I want to know is which makers have cut corners. I suspect we'll only know when their hands are forced by hackers publishing a list. I have a Siemens S685IP, and Siemens do occasionally release firmware updates for it since it has an internet connection; I would hope that if it is vulnerable, it will be fixable and fixed - quite possibly the DECT part will rely on an ASIC whose algorithms are burned into to mask ROM and cannot be changed :-(
It's pretty much like the car whisperer hack which allows you to take over someone's bluetooth headset!
Paris - because even she knows that telephones are not secure