Package: dracut-core
Severity: normal
X-Debbugs-CC: whonix-de...@whonix.org

Dear maintainer,

systemd does not wipe the LUKS disk encryption key for root disk from
RAM during shutdown.

Quote myself [0]:

> Avoiding all sidelines, keeping this simple, for my understanding and
for the record and please correct me if I am wrong... Summary:
>
> "cryptsetup close" of root device during shutdown is already implemented.


Quote systemd developer Lennart Poettering [0]:

> iff your initrd/distro of choice do so. For the root disk it doesn’t
matter what systemd does, it matters what the initrd/distro do. hence
ping the maintainers of those.


The purpose of this is to defeat a cold boot attack. [1] [2] [3] [4]

I reported this bug against Debian cryptsetup. [5]

Cheers,
Patrick

[0] https://github.com/systemd/systemd/issues/17887
[1] https://www.youtube.com/watch?v=JDaicPIgn9U
[2] https://en.wikipedia.org/wiki/Cold_boot_attack
[3] https://blog.f-secure.com/cold-boot-attacks/
[4]
https://www.usenix.org/legacy/event/sec08/tech/full_papers/halderman/halderman.pdf
[5] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978642

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