21 March 2008 | 40,991 views

New Windows XP & Vista Full Take-over Hack with Firewire

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This Firewire hack seems to be creating a big buzz, from what I’ve read it also works on Vista as for some odd reason the Firewire port gets access to the whole memory space in DMA mode – not just what it needs to function – so you can read from anything stored in memory with the right tools.

Pretty worrying eh? There is a few ways to secure yourself if you feel this is a threat (Disable the 1394 bus or disable DMA).

A security consultant based in New Zealand has released a tool that can unlock Windows computers in seconds without the need for a password.

Adam Boileau first demonstrated the hack, which affects Windows XP computers but has not yet been tested with Windows Vista, at a security conference in Sydney in 2006, but Microsoft has yet to develop a fix.

Interviewed in ITRadio’s Risky Business podcast, Boileau said the tool, released to the public today, could “unlock locked Windows machines or login without a password … merely by plugging in your Firewire cable and running a command”.

If you are interested in the details and want to read about the Windows Vista Firewire hack you can do so here [PDF].

As I’ve always said though, if you have physical access you basically own the machine. Physical security of servers is a lot more important than many people think.

To use the tool, hackers must connect a Linux-based computer to a Firewire port on the target machine. The machine is then tricked into allowing the attacking computer to have read and write access to its memory.

With full access to the memory, the tool can then modify Windows’ password protection code, which is stored there, and render it ineffective.

Older desktop computers do not come equipped with Firewire ports, which are needed for the hack to work, but many recent models do. Most laptops made in the last few years include Firewire ports.

Microsoft has been unavailable for comment about this issue of course. The FD thread is extremely long, if you are interested in reading it you can do so here.

Source: Sydney Morning Herald



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7 Responses to “New Windows XP & Vista Full Take-over Hack with Firewire”

  1. Bogwitch 21 March 2008 at 11:05 am Permalink

    It’s not just MS OSes that are vulnerable to this – anything with an active firewire.
    The reason it can access the memory direclty is that Firewire is a BUS whereas USB etc. is a PORT.

  2. Pantagruel 21 March 2008 at 1:24 pm Permalink

    A fun thing to read.

    Like Bogwitch says, it’s a bus and has direct DMA access, basically needed since most of the firewire attached stuf is a HDD or other drive which want/need DMA access. Did a trial with disabled DMA but trying to capture video from the firewire attached hi-8 cam results in significant more frame loss compared to having DMA turned on. The direct DMA access appears to be needed to ensure a proper dump of the data coming in at the firewire onto the hdd (both p-ATA and s-ATA are fast enough to capture the 4 Mb datastream).

    @Darknet, indeed a makeshift secured broom cupboard (padlock/etc and steel plate reinforced door) is enough to keep out the average purp.

  3. James C 21 March 2008 at 2:40 pm Permalink

    @Darknet
    “As I

  4. zupakomputer 21 March 2008 at 3:30 pm Permalink

    Have to agree too – the ways of taking over a machine are plentiful if you have physical access to it.

  5. fever 10 April 2008 at 4:43 pm Permalink

    another example of disable that which you do not use. Or it will come to bite you in the end.

  6. Clarkson 5 January 2009 at 8:32 pm Permalink

    Just pick up the machine and walk out with it, if you have physical access to the box.

  7. Bogwitch 5 January 2009 at 10:52 pm Permalink

    Clarkson,

    The attack mentioned does have some practical application.
    Imagine a workstation with full disk encryption. Having physical access to the workstation is not much use. Now, if the workstation is powered, but locked, the attacker can gain access to the OS using this method.