So I’ve just had a quick play with this and yes, it works.
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@gsuberland @kirenida @GossiTheDog It could maybe restore my windows where bitlocker prompts me for the key which I have forgotten. Or I get that prompt because my TPM forgot the key, and that's then not possible.
Anyway, running linux now.@gunstick @kirenida @GossiTheDog nope. it needs a functioning TPM with the right key, and BitLocker in no password mode. this is only functionally a login bypass.
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog
Oh wow, a backdoor in a Microsoft product, much wow \s -
M mrmasterkeyboard@mastodon.social shared this topic
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog I am shocked. Shocked I say!
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@GossiTheDog I am shocked. Shocked I say!
Rememeber: never ask “is this Microsoft security product backdoored?”
Instead ask: “how exactly is it backdoored? How many back doors are there?”
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog i wouldn't be surprised if this was supposed to only be built in certain branches via velocity configuration, and someone fucked up when merging some other changes in -
Rememeber: never ask “is this Microsoft security product backdoored?”
Instead ask: “how exactly is it backdoored? How many back doors are there?”
@GossiTheDog Also: that’s worse?
- Microsoft and intentionally backdooring BitLocker
- Microsoft unintentionally backdooring bitlocker -
So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
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I think my prior toot on NightmareEclipse auto deleted so to make a perm one - it isn’t me. I suspect it’s somebody who used to work at MSFT, who departed after my era.
For anybody looking at this, testing showed two things:
- TPM unlocked the storage
- it provides a login bypass, as you’re dumped as SYSTEM prior to Windows Hello or password loginBitLocker operates without a PIN by default so it’s basically a big gap, it’s unclear how this code made it into the production version of Windows.
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For anybody looking at this, testing showed two things:
- TPM unlocked the storage
- it provides a login bypass, as you’re dumped as SYSTEM prior to Windows Hello or password loginBitLocker operates without a PIN by default so it’s basically a big gap, it’s unclear how this code made it into the production version of Windows.
I should point out I’ve only tested with one version of Windows 11 - maybe the scope is smaller.
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog I'd be highly surprised if it didn't have a backdoor. Microsoft is not a company you should trust -
So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
I was worried I'd run out of tools that do not require opening a computer/laptop case, now that Microsoft's planning to patch Bitpixie this year.
But Windows is a gift that just keeps on giving
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog I always assumed anything that could unlock an encrypted drive with no password or other authentication from the user could be bypassed. I figured if you don't have to enter a password, you have to assume that neither does anybody else.
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog hi just out of curiosity why would a bios password help / be required? is that only for if pcr7 isn't bound?
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
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@tanavit @GossiTheDog
Haha oui j'ai vu passer ça, ainsi qu'une faille RCE dans Word. -
So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog why is Microsoft so lazy when it comes to developing mission critical software
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@mkoek @GossiTheDog you can also usually get the same general result in this config by poking the motherboard with a logic analyser and dumping the TPM data off the bus.
@gsuberland @mkoek @GossiTheDog Unless Microsoft made another mistake this shouldn't be possible. Accessing disk encryption keys should always use what is called a "salted session", where the communication between TPM and application is encrypted, precisely to prevent passive attacks on the bus.
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@drm Plus besoin de s'embêter à faire du TPM sniffing
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So I’ve just had a quick play with this and yes, it works. Essentially BitLocker has a backdoor. https://github.com/Nightmare-Eclipse/YellowKey
Mitigation = BitLocker PIN and BIOS password lock.
@GossiTheDog thanks God i can recover an Old ssd whose bitlocker key is somewhere in the short-circuited mainboard Something Something Secure Module and I happen to not have a backup of that specific bitlocker key
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@drm Plus besoin de s'embêter à faire du TPM sniffing
@S1m @GossiTheDog testé hier par un collègue, ça marche bien ! Mais ça va être rapidement patché...
