Dell XPS BIOS updater format not supported {XPS 9560, XPS 9550, ...}

[wbushey]

I've attempted to extract the nVidia GPU BIOS from the following Dell XPS 9560 Bios update files with out success:

• 1.5.0
• 1.8.1

In both cases I had innoextract, upx, 7z, and UEFIDump installed and available to vbiosfinder.

OS: Debian 9.4
Ruby: 2.5.0

./vbiosfinder extract ~/Downloads/XPS_15_9560_1.8.1.exe 
output will be stored in '/home/bill/Development/VBiosFinder/tmp-vbiosfinder'
checking for ruby... yes

trying to extract ./XPS_15_9560_1.8.1.exe
checking for innoextract... yes
not extractable with innoextract
checking for upx... yes
not extractable with upx
checking for 7z... yes
not extractable with 7z
checking for UEFIDump... yes
not an uefi image
Cleaning up garbage

[coderobe]

Oh yeah, I've taken a look at the BIOS of the XPS 9550 in the past, which i assume to be similar, and couldn't figure out how the update was packed. I doubt any laptop BIOS from the XPS family currently works, as they don't seem to employ the usual BIOS updater methods. If you have any information regarding their updater format i'd love to hear it.

[coderobe]

I've dug around a bit more and with ea89d34 i'm able to extract uefi data from the dell updaters now, though it looks like either they're only partial uefi images (like some sort of delta update?) or my patch doesn't catch all the data, or they don't actually have the vbios in the uefi roms

[stzokev]

I'll post here, so I do not open new issue. I tried to extract from Dell Precision 7520 (https://downloads.dell.com/FOLDER05273023M/1/Precision_7x20_1.13.0.exe) but got nowhere:

silver@Sneak:/mnt/c/Users/Silver/Desktop/VBiosFinder-master$ ./vbiosfinder extract /mnt/c/Users/Silver/Desktop/VBiosFinder-master/Precision_7x20_1.13.0.exe
output will be stored in '/mnt/c/Users/Silver/Desktop/VBiosFinder-master/tmp-vbiosfinder'
checking for ruby... yes

checking for innoextract... yes
checking for upx... yes
checking for 7z... yes
trying to extract ./Precision_7x20_1.13.0.exe
found polyglot archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot
found polyglot archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot
found zlib archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot-zlib
found polyglot archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot-zlib-polyglot
extracting uefi data
trying to extract ./Precision_7x20_1.13.0.exe
found UEFIExtract archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot
found UEFIExtract archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot
found UEFIExtract archive
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot-zlib
trying to extract ./Precision_7x20_1.13.0.exe-polyglot-polyglot-zlib-polyglot
Cleaning up garbage
/usr/lib/ruby/2.3.0/fileutils.rb:717:in `remove_entry_secure': parent directory is world writable, FileUtils#remove_entry_secure does not work; abort: "/mnt/c/Users/Silver/Desktop/VBiosFinder-master/tmp-vbiosfinder" (parent directory mode 40777) (ArgumentError)
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/cli.rb:27:in `block in extract'
/var/lib/gems/2.3.0/gems/cocaine-0.5.8/lib/cocaine/command_line.rb:82:in `run': Cocaine::CommandNotFoundError (Cocaine::CommandNotFoundError)
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/extract-uefi.rb:20:in `uefi'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/extraction.rb:8:in `call'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/extraction.rb:8:in `attempt'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/methods.rb:45:in `block in run'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/methods.rb:43:in `each'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/methods.rb:43:in `run'
        from /mnt/c/Users/Silver/Desktop/VBiosFinder-master/src/cli.rb:36:in `extract'
        from /var/lib/gems/2.3.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
        from /var/lib/gems/2.3.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
        from /var/lib/gems/2.3.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
        from /var/lib/gems/2.3.0/gems/thor-0.20.0/lib/thor/base.rb:466:in `start'
        from _init.rb:7:in `<main>'```

It spend a good amount of time (5 mins or more) on the step before "Cleaning up garbage"

[stzokev]

@coderobe I tried on the [0] file inside the .exe and got further. Can you confirm that you get that as well:

trying to extract ./[0]
found UEFIExtract archive
trying to extract ./[0]-polyglot
found UEFIExtract archive
trying to extract ./[0]-polyglot-zlib
trying to extract ./[0]-polyglot-zlib-polyglot
found UEFIExtract archive
trying to extract ./mkmf.log
found UEFIExtract archive
filtering for modules...
got 216 modules
finding vbios
no candidates found :(
input contains uefi data but no vbios could be found
the vbios might not be baked into the input!

[stzokev]

@coderobe If you could just confirm whether there is vbios in this https://downloads.dell.com/FOLDER05273023M/1/Precision_7x20_1.13.0.exe I would appreciate it.

[mani-rai]

Same for XPS 9570 bios version: 1.12.0 as well. no candidates found :(

[T-vK]

Hello everyone, I found a way to unpack the BIOS update to the point that VBiosFinder was able to extract the vBIOS ROMs.

Is there any chance we can add that functionality to VBiosFinder directly?

https://github.com/T-vK/DellBiosUnpackerPOC

Tested against this BIOS Update: https://dl.dell.com/FOLDER07188382M/1/XPS_15_9575_2-in-1_1.15.1.exe

Edit:
@wbushey @stzokev @mani-rai I just tested it against the BIOS updates you linked and it works as well.

[T-vK]

@coderobe I just noticed your thumbs-up. Can we talk about integrating this into VBiosFinder?

[coderobe]

yeah, sure - if you translate hdr-unpack to ruby i'll integrate it in here
i sadly don't currently have the time to look into that myself, but it looks like it should be fairly straightforward.

[T-vK]

Unfortunately I have no experience with Ruby at all. I'll see if I can figure it out though.

[T-vK]

@coderobe Okay, so I learned a bit of ruby now and ported the script: https://github.com/T-vK/DellBiosUnpackerPOC/blob/master/hdr-unpack.rb

Tested and works like a charm.

[coderobe]

alright - thanks! i'll look into merging it.