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  1. #1
    Senior Member SCE's Avatar
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    Detecting Sony TV file encryption

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    hi guys, is it possible to detect the encryption used to encrypt this file:

    http://www.mediafire.com/?371sodalbkui26h

    It's the firmware file of Sony KDL-52LX900 TV. Has Linux inside.

    Thanks

  2. #2
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    I'll take a look at this... (say the guy who doesn't really know what he's looking for...) What do you have in mind?

  3. #3
    Quote Originally Posted by SCE View Post
    hi guys, is it possible to detect the encryption used to encrypt this file:

    http://www.mediafire.com/?371sodalbkui26h

    It's the firmware file of Sony KDL-52LX900 TV. Has Linux inside.

    Thanks
    Was that the only file? Furthermore, how was it passed to the TV to be installed, via USB or downloaded?

  4. #4
    This look like a very critical set-up file...

  5. #5
    Thanks a lot for your replies guys. The firmware is updated via USB. When insterted, TV detects USB and looks at the folder and understands that there is afirmware. Then TV unpacks the firmware and then flashes.

    Samsung uses XOR encryption on their TV Firmware. TV has probably an ARM processor inside.

    The TV uses those software:


    [Register or Login to view code]

    The source code is here: www.sony.net/Products/Linux/TV/KDL-40NX700.html

    Topics that can help us/you better understand TV firmwares:
    http://wiki.samygo.tv/index.php5?tit...firmware&go=Go

    I also called for help from the guy who hacked Samsung TV firmware.

  6. #6
    Back with new info:

    [Register or Login to view code]

    So, what do you say? I have also applied that command:

    $ dd if=fw.bin bs=1 skip=3485529 of=out.bin

    And here is the out.bin http://www.mediafire.com/?obd981k9gz57u77

  7. #7
    O.o I think I might be able to unpack this...

  8. #8
    why would you wanna hack it? what do you mean theres linux inside.

    you mean it was compiled using linux?

    not sure i understand.

  9. #9
    Possibilities are endless. You can add mkv support, enable telnet, use busybox and even run homebrew.

    All the new smart tvs are run with linux. Samsung, lg, philips, sony...

    I appreciate your help Foo. Binwalk can be wrong sometimes though. But I will also ask the guys who are using binwalk to hack linksys firmware.

    Guys, I really need info on that.

  10. #10
    Ok guys I have made a lot of progress.

    Found service menu: http://www.technopat.net/forum/led-l....html#post4533

    And the tear down!

    http://www.technopat.net/forum/led-l....html#post4536

    I hope that this helps you give me more idea on how to go further. Any familiar port? Or any possible attack way?

    Thanks.

    //Off topic

    Boss, please update board software to 4.1.7

    Can I use my SPI flasher here?
    Last edited by SCE; 10-16-2011 at 12:03 AM Reason: Automerged Doublepost

 

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