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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=C8iSvpzl; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: 6.49 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=C8iSvpzl; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: A953DD12D X-Spam-Score: 6.49 X-Migadu-Scanner: scn0.migadu.com X-TUID: 7QRWM/XWeeWN Hi, On Sat, 19 Nov 2022 at 18:39, "pelzflorian (Florian Pelz)" wrote: >>> @quotation Note >>> Naturally, no security fixes can be provided for old versions of Guix >>> or its channels. This also means that careless use of @command{guix >>> time-machine} opens the door to downgrade attacks. >>> @xref{Invoking guix pull, @option{--allow-downgrades}}. >>> @end quotation >> >> =E2=80=98Attack=E2=80=99 is a very big word. It should not end a paragr= aph. What >> would the downgrade attack=E2=80=94distinct from a downgrade=E2=80=94loo= k like? Why not something like, --8<---------------cut here---------------start------------->8--- @quotation Note The history of Guix is immutable and @command{guix time-machine} provides the exact same software as they are in a specific Guix revision. Naturally, no security fixes are provided for old versions of Guix or its channels. A careless use of @command{guix time-machine} opens the door to security vulnerabilities @xref{Invoking guix pull, @option{--allow-downgrades}}. @end quotation --8<---------------cut here---------------end--------------->8--- ? Cheers, simon