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Gaining Root Access On Linux-Based Femtocells

viralMeme writes "According to the Register, 'Security researchers have turned their attention to femtocells, and have discovered that gaining root on the tiny mobile base stations isn't as hard as one might hope.' One of the researchers said, 'After hours of sniffing traffic, changing IP address ranges, guessing passwords and investigating hardware pinouts, we had obtained root access on these Linux-based cellular-based devices, which piqued our curiosity [about] the security implications.' Whoever designed these devices should be sent back to computer school. An authentication device that can be bypassed is a contradiction in terms. Or, as some pen-pusher would put it in a report: an unantipicated security excursion.

8 of 102 comments (clear)

  1. Jedi Mind Trick, actually by Monkeedude1212 · · Score: 4, Funny

    An authentication device that can be bypassed is a contradiction in terms.

    You don't need to see his identification.

    1. Re:Jedi Mind Trick, actually by davester666 · · Score: 5, Insightful

      The very concept of Femtocell's is bass-ackwards. You pay a carrier for wireless access, then pay again for a device to actually provide you with the wireless access, along with monthly fee's for the device and also pay for internet access so the device can connect to the carrier over the internet.

      It's like "we couldn't be bothered to actually provide you with coverage at your home/office, so would you mind building out our network for us, and pay us extra for the privilege of doing so".

      --
      Sleep your way to a whiter smile...date a dentist!
    2. Re:Jedi Mind Trick, actually by jeffmeden · · Score: 4, Informative

      You pay for the hardware, and the 'minutes' at the normal rate, but no carrier I have seen charges you per month for owning the cell. It isn't nearly as sinister as you describe, since their network still has to haul the call where it's going, even if you do in fact bring it to them via the Internet.

      You are right that it's 'their job' to provide you with coverage, but no carrier asserts that they will go to any length necessary to cover 100% of the earth with 100% usable signal. Verizon's ad campaign featuring an army of tower workers following customers around was hyperbolic. Sorry if you got confused.

    3. Re:Jedi Mind Trick, actually by ScentCone · · Score: 5, Informative

      so would you mind building out our network for us, and pay us extra for the privilege of doing so

      Nonsense. I bought a unit to extend Verizon's coverage into the areas of my house that the local tower just can't handle. Like, down in the basement - a level of service that no carrier is going to say they'll promise. Verizon doesn't charge me anything for using it, other than the cost of the hardware - a one-time purchase that I gladly, gladly made. And I can sell the unit any time I want, and any other Verizon customer can use it - and there's no account-related paperwork involved. The devices just work. They look for a DHCP server on your LAN, and off you go. You do need to fire them up near a window until they get their GPS bearings, though. But they don't have to stay there.

      You know what else is nice? The household mobile phones now only have to talk to a transciever that's a stone's throw away, instead of a quarter of a mile or more away. That means much better battery life when they're not tethered to a charger.

      --
      Don't disappoint your bird dog. Go to the range.
    4. Re:Jedi Mind Trick, actually by 140Mandak262Jamuna · · Score: 5, Funny

      Verizon's ad campaign featuring an army of tower workers following customers around was hyperbolic. Sorry if you got confused.

      The joke's on you pal. All those cell towers use Yagi dipole antennae. They are neither parabolic not hyperbolic.

      --
      sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
  2. A couple of points ... by PPH · · Score: 4, Interesting

    The summary mentions "investigating hardware pinouts". This makes me think that the attack is, in part, on the hardware. If one has access to hardware, they've pwned the system. Period. So this is a non-issue.

    Second; cell phones trusting the base station has always been a security issue. And "exploits" based upon this weakness are already in use by law enforcement as well as criminals. The whole inmates sneaking cell phones into prisons has been made a non-issue based upon this very approach. Prisons are beginning to cover their facilities with femtocells which give them the ability to monitor all illicit cell traffic on their property. Any truly secure system will assume that the network carrying its traffic is insecure.

    --
    Have gnu, will travel.
  3. Re:it still comes down to one thing by mcrbids · · Score: 4, Insightful

    Too many companies are still shipping products that have no intended user access to the command shell with passwords like "Admin", "12345", and the ever-popular "password". It's not like it costs more to have a longer, more complex password.

    You think longer, complex setup doesn't cost the company money? I gather that you haven't considered support costs?

    The best solution I've seen so far is to have a strong password printed on a sticker on the outside of the box. That's a pretty good compromise because if the attacker has physical access to the box, he/she could hit the "Reset" button on the device anyway. Thus, putting the password on the bottom of the device on a sticker really isn't any less secure than other solutions, and this can be done fairly cheaply.

    But it still costs - each router has to be given its own unique password, and a process has to be set up to match up the passwords given with the stickers, and there are still more support costs from the clueless dolts who have to be told to look on the bottom of the device for the default password.

    If you assume any intelligence on the part of the end user, your support costs will quickly challenge that assumption!

    --
    I have no problem with your religion until you decide it's reason to deprive others of the truth.
  4. Oh my... so that's what's going on. by Petersko · · Score: 4, Funny

    I had no idea linux proponents were all Jedi. That explains everything.

    "You don't NEED the extra features in Photoshop."

    "You don't NEED integrated audio processing software."

    "You don't NEED anything OpenOffice doesn't have."

    "You don't NEED..."

    Now those Jedi need to start using their powers for good.

    "You NEED to write documentation for non-technical users..."