Dissecting a firmware image

hackaday.com 23 Feb '13, 1am

Dissecting a firmware image

[Leland Flynn] did a great job of picking apart the firmware image for a Westell 9100EM FiOS router . Unfortunately he didn’t actually find the information he was looking for. But he’s not quite done poking around yet either. If you have never tried to make sense of an embedded Linux firmware image this serves as a great beginner’s example of how it’s done. He was turned on to the project after port scanning his external IP and finding a random login prompt which he certainly didn’t set up. Some searching led him to believe this is some kind of back door for Verizon to push automatic firmware updates to his router. He figured why not see if he could yank the credentials and poke around inside of the machine? He started by downloading the latest firmware upgrade. Running ‘hexdump’ and ‘strings’ gives him confirmation that the image is based on Linux. He’s then able to pick ...

Full article: http://hackaday.com/2013/02/22/dissecting-a-firmware-image/

Tweets

@nikropht » 24 Feb '13, 4pm
Awesome Leland R. Flynn III [link] [link]
@equinoxefr_org » 23 Feb '13, 11am
Dissecting a firmware image /by @szczys [link]
@Can_O_Spam » 23 Feb '13, 6am
Check this out: Dissecting a firmware image [link]
@rwohleb » 23 Feb '13, 4am
RT @hackaday: New post: Dissecting a firmware image [link]
@thetanktheory » 23 Feb '13, 3am
RT @hackadayrss: Dissecting a firmware image [link]
@thetanktheory » 23 Feb '13, 3am
I'm on @hackadayrss again! :D #nerdgasm [link]
@johnmcclure00 » 23 Feb '13, 2am
Dissecting a #firmware image. Very cool and fun for all! [link] #infosec
@tsairox » 23 Feb '13, 2am
Dissecting a firmware image: [Leland Flynn] did a great job of picking apart the firmware image for... [link] #tech #tfb
@knightowlcasts » 23 Feb '13, 2am
Hack a day Dissecting a firmware image: [Leland Flynn] did a great job of picking apart the firmware image for... [link]
@IoTFeed » 23 Feb '13, 1am
Dissecting a firmware image: [Leland Flynn] did a great job of picking apart the firmware image for a We... [link] #iot
@seanthegeek » 23 Feb '13, 1am
Ever wonder what's running on that embedded system? Here's how you can find out: [link]
@vpnprotected » 23 Feb '13, 1am
Dissecting a firmware image [link] #VPNSecurity [link]
@hackaday » 23 Feb '13, 1am
New post: Dissecting a firmware image [link]
@hackadayrss » 23 Feb '13, 1am
Dissecting a firmware image [link]
@SuprayCyber4rt » 23 Feb '13, 1am
Dissecting a firmware image [link]
@imcyberteam » 23 Feb '13, 1am
Dissecting a firmware image [link]