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Re: "hacking" a wireless ap firmware
From: Jorge Augusto Senger <jorge () br10 com br>
Date: Fri, 07 Jul 2006 17:17:19 -0300

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There's an open-source firmware for Ovislink 1120 AP and other devices
with RTL8181 chipset that runs on Linux:
http://sourceforge.net/project/showfiles.php?group_id=147466

Jorge


David M. Zendzian wrote:
Maybe you should check out the many tiny flash systems for APs out there
and see how they build their ".bin" to be able to reverse engineer how
someone else's build is.

Although why reengineer a firmware, why not just reflash the device with
your own firmware, much quicker/easier and most likely won't be noticed
if you have that kind of access...

Just google "linux linksys" and start there.

david

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

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