Rufus suggest to upgrade grub and makes unbootable stick of kav rescue disk #467

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gggeek opened this Issue Mar 15, 2015 · 4 comments

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gggeek commented Mar 15, 2015

When trying to create a usb stick for kaspersky rescue disk, rufus 2.0 prompted me to download grub 2.0 because only 2.0-beta was found.
The resulting stick would not boot and drop me to a grub emergency prompt

@pbatard pbatard self-assigned this Mar 15, 2015

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pbatard Mar 15, 2015

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I replicated the issue. Unfortunately, the Kaspersky people seem to be fudging their versioning of GRUB, as they explicitly set their version to 0 (this can be seen in the normal.mod on their ISO).

This is VERY BAD practice, and of course it makes it next to impossible for Rufus to figure out what is the actual version of Grub that Kaspersky are using, so that their ISO can be converted to bootable USB.

At this stage, I may very well add code that states that the Kaspersky ISO (or any other ISO that sets its GRUB version to something as inaccurate as 0) is unsupported...

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pbatard commented Mar 15, 2015

I replicated the issue. Unfortunately, the Kaspersky people seem to be fudging their versioning of GRUB, as they explicitly set their version to 0 (this can be seen in the normal.mod on their ISO).

This is VERY BAD practice, and of course it makes it next to impossible for Rufus to figure out what is the actual version of Grub that Kaspersky are using, so that their ISO can be converted to bootable USB.

At this stage, I may very well add code that states that the Kaspersky ISO (or any other ISO that sets its GRUB version to something as inaccurate as 0) is unsupported...

@pbatard pbatard added this to the 2.1 milestone Mar 15, 2015

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gggeek Mar 15, 2015

I see. Otoh Unetbootin does not seem to have any problems with it.
Is the approach taken by the two apps completely different?

gggeek commented Mar 15, 2015

I see. Otoh Unetbootin does not seem to have any problems with it.
Is the approach taken by the two apps completely different?

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pbatard Mar 16, 2015

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Yes it is. If I were to take a guess, I'd say Unetbootin probably tries to replace all of the GRUB files, whereas Rufus only tries to replace the GRUB bootloader. But to be able to do that, it needs to know the version of GRUB that was used when creating the ISO.

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pbatard commented Mar 16, 2015

Yes it is. If I were to take a guess, I'd say Unetbootin probably tries to replace all of the GRUB files, whereas Rufus only tries to replace the GRUB bootloader. But to be able to do that, it needs to know the version of GRUB that was used when creating the ISO.

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pbatard Mar 17, 2015

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Well, I spent the last 3 hours trying to guess the GRUB version Kaspersky used, but none of the one I tried (starting with 1.97) worked.
So Kaspersky or any ISO that can't report a proper version is out.

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pbatard commented Mar 17, 2015

Well, I spent the last 3 hours trying to guess the GRUB version Kaspersky used, but none of the one I tried (starting with 1.97) worked.
So Kaspersky or any ISO that can't report a proper version is out.

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