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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:

    [Register or Login to view links]

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

    Thanks

  2. #2
    Senior Member Foo's Avatar
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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
    Toucan Sam CJPC's Avatar
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    Quote Originally Posted by SCE View Post
    hi guys, is it possible to detect the encryption used to encrypt this file:

    [Register or Login to view links]

    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
    Senior Member Foo's Avatar
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    This look like a very critical set-up file...

  5. #5
    Senior Member SCE's Avatar
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    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: [Register or Login to view links]

    Topics that can help us/you better understand TV firmwares:
    [Register or Login to view links]

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

  6. #6
    Senior Member SCE's Avatar
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    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 [Register or Login to view links]

  7. #7
    Senior Member Foo's Avatar
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    O.o I think I might be able to unpack this...

  8. #8
    Senior Member elser1's Avatar
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    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
    Senior Member SCE's Avatar
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    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
    Senior Member SCE's Avatar
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    Ok guys I have made a lot of progress.

    Found service menu: [Register or Login to view links]

    And the tear down!

    [Register or Login to view links]

    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; 10-15-2011 at 11:03 PM Reason: Automerged Doublepost

 

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