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Re: "hacking" a wireless ap firmware
From: Rogan Dawes <discard () dawes za net>
Date: Fri, 07 Jul 2006 17:47:51 +0200

Norbert Fran├žois wrote:
Hi everybody...

After a discussion with a friend of mine, I argued that it was
possible to change the behaviour of a firmware, so that an attacker
could put a backdoor inside, for instance :S...

Perhaps I spoke a bit quickly, 'cause now I feel a bit lost in
modifying the firmware :(.

Basically, every access point proposes you to update its firmware...
Most of the fime, these firmware are sold in a *.bin format. After
having tried to search for relevant strings in the bin, disassembling
it and loosing time, I'm still at the same point :(.

Do you have any experience in firmware modification ? Do you know in
which language firwares are written ? Maybe tryin' a decompilation
could help me...

Thanks a lot

Norbert

Do you have a specific Access Point in mind? If not, choose one that runs Linux, such as a Linksys WRT54G v1-4 or WRT54GL, or any of a whole range that also run Linux.

See www.openwrt.org for some examples of what is possible.

Rogan


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