From unknown Sat Aug 09 20:34:11 2025 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) Content-Type: text/plain; charset=utf-8 From: bug#59383 <59383@debbugs.gnu.org> To: bug#59383 <59383@debbugs.gnu.org> Subject: Status: [PATCH] doc: Call out potential for downgrade attacks with time-machine. Reply-To: bug#59383 <59383@debbugs.gnu.org> Date: Sun, 10 Aug 2025 03:34:11 +0000 retitle 59383 [PATCH] doc: Call out potential for downgrade attacks with ti= me-machine. reassign 59383 guix-patches submitter 59383 "pelzflorian (Florian Pelz)" severity 59383 normal tag 59383 patch thanks From debbugs-submit-bounces@debbugs.gnu.org Sat Nov 19 07:09:43 2022 Received: (at submit) by debbugs.gnu.org; 19 Nov 2022 12:09:43 +0000 Received: from localhost ([127.0.0.1]:39194 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owMfH-0001Qf-3L for submit@debbugs.gnu.org; Sat, 19 Nov 2022 07:09:43 -0500 Received: from lists.gnu.org ([209.51.188.17]:45958) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owMfD-0001QW-Sn for submit@debbugs.gnu.org; Sat, 19 Nov 2022 07:09:40 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1owMfD-0007lE-1E for guix-patches@gnu.org; Sat, 19 Nov 2022 07:09:39 -0500 Received: from relay.yourmailgateway.de ([188.68.61.103]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1owMfB-0001ah-0v for guix-patches@gnu.org; Sat, 19 Nov 2022 07:09:38 -0500 Received: from mors-relay-8403.netcup.net (localhost [127.0.0.1]) by mors-relay-8403.netcup.net (Postfix) with ESMTPS id 4NDssB53Twz8FyW for ; Sat, 19 Nov 2022 13:09:34 +0100 (CET) Authentication-Results: mors-relay-8403.netcup.net; dkim=permerror (bad message/signature format) Received: from policy02-mors.netcup.net (unknown [46.38.225.35]) by mors-relay-8403.netcup.net (Postfix) with ESMTPS id 4NDssB4fcdz8FyV for ; Sat, 19 Nov 2022 13:09:34 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at policy02-mors.netcup.net X-Spam-Flag: NO X-Spam-Score: -2.9 X-Spam-Level: X-Spam-Status: No, score=-2.9 required=6.31 tests=[ALL_TRUSTED=-1, BAYES_00=-1.9] autolearn=ham autolearn_force=no Received: from mxe217.netcup.net (unknown [10.243.12.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by policy02-mors.netcup.net (Postfix) with ESMTPS id 4NDssB1gp2z8sZj for ; Sat, 19 Nov 2022 13:09:33 +0100 (CET) Received: from florianrock64 (ip5b40a50f.dynamic.kabel-deutschland.de [91.64.165.15]) by mxe217.netcup.net (Postfix) with ESMTPSA id DDE5B9EC28 for ; Sat, 19 Nov 2022 13:09:32 +0100 (CET) From: "pelzflorian (Florian Pelz)" To: guix-patches@gnu.org Subject: [PATCH] doc: Call out potential for downgrade attacks with time-machine. Date: Sat, 19 Nov 2022 13:09:31 +0100 Message-ID: <87v8nbjgck.fsf@pelzflorian.de> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: DDE5B9EC28 X-Spamd-Result: default: False [-5.60 / 15.00]; BAYES_HAM(-5.50)[99.99%]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:3209, ipnet:91.64.0.0/14, country:DE]; RCVD_COUNT_ZERO(0.00)[0]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_NONE(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Server: rspamd-worker-8404 X-NC-CID: ip98Zx+PmbU45acym2xo8CtWj6pFnurWd7hiUPMAmMvldKgJvFK9yDzH Received-SPF: none client-ip=188.68.61.103; envelope-from=pelzflorian@pelzflorian.de; helo=relay.yourmailgateway.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) * doc/guix.texi (Invoking guix time-machine): Add a note. --- doc/guix.texi | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/doc/guix.texi b/doc/guix.texi index eaecfd0daa..c29db13be6 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -60,7 +60,7 @@ Copyright @copyright{} 2018 Mike Gerwitz@* Copyright @copyright{} 2018 Pierre-Antoine Rouby@* Copyright @copyright{} 2018, 2019 G=C3=A1bor Boskovits@* -Copyright @copyright{} 2018, 2019, 2020 Florian Pelz@* +Copyright @copyright{} 2018, 2019, 2020, 2022 Florian Pelz@* Copyright @copyright{} 2018 Laura Lazzati@* Copyright @copyright{} 2018 Alex Vong@* Copyright @copyright{} 2019 Josh Holland@* @@ -4834,6 +4834,13 @@ Invoking guix time-machine large number of packages; the result is cached though and subsequent commands targeting the same commit are almost instantaneous. =20 +@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 + The general syntax is: =20 @example base-commit: 7502af793172714b2b322c21ba2379c698108ef2 --=20 2.38.0 From debbugs-submit-bounces@debbugs.gnu.org Sat Nov 19 08:39:06 2022 Received: (at submit) by debbugs.gnu.org; 19 Nov 2022 13:39:06 +0000 Received: from localhost ([127.0.0.1]:39262 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owO3m-0005oF-49 for submit@debbugs.gnu.org; Sat, 19 Nov 2022 08:39:06 -0500 Received: from lists.gnu.org ([209.51.188.17]:46476) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owO3j-0005o6-BI for submit@debbugs.gnu.org; Sat, 19 Nov 2022 08:39:05 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1owO3j-0002Q2-5Q for guix-patches@gnu.org; Sat, 19 Nov 2022 08:39:03 -0500 Received: from tobias.gr ([2a02:c205:2020:6054::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1owO3h-0002rB-Ck for guix-patches@gnu.org; Sat, 19 Nov 2022 08:39:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; s=2018; bh=RwARdBu7Ub6JJ XRPiTZZwF5WmKG0nZf7nIvHkbz9Gm0=; h=in-reply-to:date:subject:cc:to: from:references; d=tobias.gr; b=AZl6gLGMzNCcROTPzUCNDnJ//MRI3RbkuECUwM CXplsjXwizxMoFHGWwJTSo94G+gdIOm7Qr3zUlO4/F8/SA39L9Dt43PyFhpqz8b1Fqk9zL MKWCTT/MVaf94o3y+o0P/vS7tdiCYDUs5ty0sMPs4QcqrW7JrTU3fqjlgr1tWEgEt5gN6b nAlJaBzMijPPHsz/mgs1n82ocGhj6Dd/WGZzzyZnPSVsUhrzR0KIc3BKbvo4Vg+1FGBRo7 ayMypaD++u4zA501DEXW/zfvdRtgPwA6qcWBPrIAnli6kyXUJtIk5niLb4fBfR/SUkqIWJ dLyCdFrExDhsbXZqUrkkTt+w== Received: by submission.tobias.gr (OpenSMTPD) with ESMTPSA id f7f9ca7a (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO); Sat, 19 Nov 2022 13:38:48 +0000 (UTC) References: <87v8nbjgck.fsf@pelzflorian.de> From: Tobias Geerinckx-Rice To: "pelzflorian (Florian Pelz)" Subject: Re: [bug#59383] [PATCH] doc: Call out potential for downgrade attacks with time-machine. Date: Sat, 19 Nov 2022 14:37:16 +0100 In-reply-to: <87v8nbjgck.fsf@pelzflorian.de> BIMI-Selector: v=BIMI1; s=default; Message-ID: <8735af9i8b.fsf@nckx> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Received-SPF: pass client-ip=2a02:c205:2020:6054::1; envelope-from=me@tobias.gr; helo=tobias.gr X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.6 (-) X-Debbugs-Envelope-To: submit Cc: 59383@debbugs.gnu.org, guix-patches@gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.6 (--) --=-=-= Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Hi Florian, and thanks for the patch. pelzflorian (Florian Pelz) =E5=86=99=E9=81=93=EF=BC=9A > +@quotation Note > +Naturally, no security fixes can be provided for old versions=20 > of Guix > +or its channels. This also means that careless use of=20 > @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 paragraph= . What=20 would the downgrade attack=E2=80=94distinct from a downgrade=E2=80=94look l= ike? Kind regards, T G-R --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iIMEARYKACsWIQT12iAyS4c9C3o4dnINsP+IT1VteQUCY3jcdA0cbWVAdG9iaWFz LmdyAAoJEA2w/4hPVW15+UQBAMLDk9dFxu8TKhm3O+rnX6D+VV5EKAFjLZMOSnFz 5ZSlAQDG77jDtZPiFJqL+a9LNwnp5ZhzwoYpv9MnUYwwwzG7Dg== =QvE2 -----END PGP SIGNATURE----- --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Sat Nov 19 12:40:00 2022 Received: (at 59383) by debbugs.gnu.org; 19 Nov 2022 17:40:00 +0000 Received: from localhost ([127.0.0.1]:41054 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owRou-0003mL-Bs for submit@debbugs.gnu.org; Sat, 19 Nov 2022 12:40:00 -0500 Received: from relay.yourmailgateway.de ([188.68.63.102]:55505) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1owRos-0003mB-Bf for 59383@debbugs.gnu.org; Sat, 19 Nov 2022 12:39:59 -0500 Received: from mors-relay-2502.netcup.net (localhost [127.0.0.1]) by mors-relay-2502.netcup.net (Postfix) with ESMTPS id 4NF1BN6jxvz5yrm; Sat, 19 Nov 2022 18:39:56 +0100 (CET) Authentication-Results: mors-relay-2502.netcup.net; dkim=permerror (bad message/signature format) Received: from policy02-mors.netcup.net (unknown [46.38.225.35]) by mors-relay-2502.netcup.net (Postfix) with ESMTPS id 4NF1BN5tqSz54HD; Sat, 19 Nov 2022 18:39:56 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at policy02-mors.netcup.net X-Spam-Flag: NO X-Spam-Score: -2.899 X-Spam-Level: X-Spam-Status: No, score=-2.899 required=6.31 tests=[ALL_TRUSTED=-1, BAYES_00=-1.9, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mxe217.netcup.net (unknown [10.243.12.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by policy02-mors.netcup.net (Postfix) with ESMTPS id 4NF1BM5Hjnz8sbC; Sat, 19 Nov 2022 18:39:54 +0100 (CET) Received: from florianrock64 (ip5b40a50f.dynamic.kabel-deutschland.de [91.64.165.15]) by mxe217.netcup.net (Postfix) with ESMTPSA id A853E9E9FF; Sat, 19 Nov 2022 18:39:51 +0100 (CET) From: "pelzflorian (Florian Pelz)" To: Tobias Geerinckx-Rice Subject: Re: [bug#59383] [PATCH] doc: Call out potential for downgrade attacks with time-machine. References: <87v8nbjgck.fsf@pelzflorian.de> <8735af9i8b.fsf@nckx> Date: Sat, 19 Nov 2022 18:39:50 +0100 In-Reply-To: <8735af9i8b.fsf@nckx> (Tobias Geerinckx-Rice's message of "Sat, 19 Nov 2022 14:37:16 +0100") Message-ID: <87wn7qn8rd.fsf@pelzflorian.de> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: A853E9E9FF X-Spamd-Result: default: False [-3.48 / 15.00]; BAYES_HAM(-3.38)[94.10%]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_THREE(0.00)[3]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:3209, ipnet:91.64.0.0/14, country:DE]; FROM_HAS_DN(0.00)[]; RCVD_COUNT_ZERO(0.00)[0]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Server: rspamd-worker-8404 X-NC-CID: w28TCRlbdQ4tR48ldaI7JSIzbxMMUZYSIrf7UuN3UpxlW+Rm7ue69lDa X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 59383 Cc: 59383@debbugs.gnu.org, guix-patches@gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Hi Tobias, thanks for your thoughts. Tobias Geerinckx-Rice writes: > pelzflorian (Florian Pelz) =E5=86=99=E9=81=93=EF=BC=9A >> @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 paragra= ph. What > would the downgrade attack=E2=80=94distinct from a downgrade=E2=80=94look= like? My choice of words was the same as in the unattended upgrades service, but perhaps I should add before the @xref: Suggestions to ``just use the time machine'' could be attempts to trick people to use old software. But they can also get you back to a working state. Regards, Florian From debbugs-submit-bounces@debbugs.gnu.org Mon Nov 21 06:26:05 2022 Received: (at 59383) by debbugs.gnu.org; 21 Nov 2022 11:26:05 +0000 Received: from localhost ([127.0.0.1]:45560 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ox4w8-0001QY-SM for submit@debbugs.gnu.org; Mon, 21 Nov 2022 06:26:05 -0500 Received: from mail-wm1-f43.google.com ([209.85.128.43]:33454) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ox4w4-0001Q3-UL for 59383@debbugs.gnu.org; Mon, 21 Nov 2022 06:26:02 -0500 Received: by mail-wm1-f43.google.com with SMTP id ja4-20020a05600c556400b003cf6e77f89cso10406730wmb.0 for <59383@debbugs.gnu.org>; Mon, 21 Nov 2022 03:26:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:from:to:cc:subject:date:message-id :reply-to; bh=K7aYjw97TqGnKLX9Z64QSwzqieyLqXD9pm16Oq2J9/0=; b=C8iSvpzlAypYQ5cgMAH9I+X23k9A23y4AaehAWYFUvmbv9/vSClU+uqOR/poCOOEZR jasKsSzHEVYvmhayM2z1RpG6JaFewW4L4W2yKjrpBbaeEsJ9dDQAuKxZ+RolobzpZeqA 4eyrBn362deVZnTLw9a+b5seALi0JmdZHg7wnRDozSWDrUtf6m8wzfoaVsWy0e1i/39s rTzVDABMfC28NZKkKE/fvJfVNxjI/wkUDI3febiEVG7+2onA/tzusEVPEkTK0GdS4UB+ 2RlTslhKNG8jb5qc3X37mj2Vj6IntR1FGO5Z1wzZzA3abqW7keGeihyhaIuQl7ivl83X +QOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=K7aYjw97TqGnKLX9Z64QSwzqieyLqXD9pm16Oq2J9/0=; b=ceoOBRtiTKQI0s5Q6Iu614p4qf9Ispmde3FNITie2SOKFPnNhQYeZLyHN5alxW0h57 kw8mO+Vz20KsipJMgJRI3mN3Z8p1pmR9BmMx24AswimyKww1SbvZFERrqayVjiUzVnhd HhVNGNIBae9luzpPN8A13TGLnrb4+jtKIiQw3kduzZGIBdX0qM50+0lXW8LEnHW0koXD q9s6bAGuVxzk98HKc4e5KxOtQGOz8F13cFfYbfzm0YBqMejd05zwVFgfmlFGqh29IFFV 5Pg4PbMKEfy0hBPEpsUPu/kvCXDwPa00xhrtIkBjCXcFOB2qOYqZ2ayzrox2hQdInr94 pdTg== X-Gm-Message-State: ANoB5pnE2ZqBte329mZLZumLOcjat6P7YJBHhKdeWdgK0jNRicfj5XVx xhAdq1WDbZ1q6KX0mBQ25Ohxpj8t07U= X-Google-Smtp-Source: AA0mqf6AS8pZvqEzPOWB9LGJD0oQ791eNK9aECySRAIlGVv43G64qqJQYFW9p3pccS2pLD1DqOrY3A== X-Received: by 2002:a05:600c:468c:b0:3cf:7c81:caae with SMTP id p12-20020a05600c468c00b003cf7c81caaemr5763173wmo.135.1669029954687; Mon, 21 Nov 2022 03:25:54 -0800 (PST) Received: from lili ([2a01:e0a:59b:9120:65d2:2476:f637:db1e]) by smtp.gmail.com with ESMTPSA id w11-20020a1cf60b000000b003cfbe1da539sm13325601wmc.36.2022.11.21.03.25.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Nov 2022 03:25:54 -0800 (PST) From: zimoun To: "pelzflorian (Florian Pelz)" , Tobias Geerinckx-Rice Subject: Re: [bug#59383] [PATCH] doc: Call out potential for downgrade attacks with time-machine. In-Reply-To: <87wn7qn8rd.fsf@pelzflorian.de> References: <87v8nbjgck.fsf@pelzflorian.de> <8735af9i8b.fsf@nckx> <87wn7qn8rd.fsf@pelzflorian.de> Date: Mon, 21 Nov 2022 12:19:05 +0100 Message-ID: <86a64kk11y.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 59383 Cc: 59383@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) 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 From debbugs-submit-bounces@debbugs.gnu.org Tue Nov 22 02:58:24 2022 Received: (at 59383) by debbugs.gnu.org; 22 Nov 2022 07:58:24 +0000 Received: from localhost ([127.0.0.1]:49623 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxOAi-0002HS-IF for submit@debbugs.gnu.org; Tue, 22 Nov 2022 02:58:24 -0500 Received: from eggs.gnu.org ([209.51.188.92]:52080) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxOAh-0002HF-0H for 59383@debbugs.gnu.org; Tue, 22 Nov 2022 02:58:24 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oxOAb-0005RK-Hm; Tue, 22 Nov 2022 02:58:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=LWvmAAhkNpAwXaqKMH1nFAtTlecZZOgku+xogP6Sn30=; b=ViyBWkhKo78KNtbOM+g0 0cR4xm6+Xk8pUVZH5wAT9WWDTQ5R2fi8nE7+KebV8RzomKVHd5PWhN39lyVB/eOkNyx9GtVvkVION 4fyARRjesGrb+IiHfjXF/4oJdF4I43WbFn+XJnFtEoNznBXy2In+F4wFucN5OXIQcE11OXb4l5NN8 jJn4ixCXzBBVw6u79GlnOUx5L6ZnTWlyzsFHy3Hqmtvm6RumUptPKHereHFiO6ZP/leuR790LXW6M qyhe9axNy4YdU5dPlP1Zcz9g5uLy+xZ+9MLyNgsXGhFOM6fcTm892lqnBi3D8sAjZqa1fF4fufgKq YKXPwGMuEISfJQ==; Received: from [89.207.171.76] (helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oxOAa-0007ey-1w; Tue, 22 Nov 2022 02:58:17 -0500 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: zimoun Subject: Re: bug#59383: [PATCH] doc: Call out potential for downgrade attacks with time-machine. References: <87v8nbjgck.fsf@pelzflorian.de> <8735af9i8b.fsf@nckx> <87wn7qn8rd.fsf@pelzflorian.de> <86a64kk11y.fsf@gmail.com> Date: Tue, 22 Nov 2022 08:58:08 +0100 In-Reply-To: <86a64kk11y.fsf@gmail.com> (zimoun's message of "Mon, 21 Nov 2022 12:19:05 +0100") Message-ID: <87pmdfifov.fsf_-_@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 59383 Cc: Tobias Geerinckx-Rice , "pelzflorian \(Florian Pelz\)" , 59383@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) Hi, zimoun skribis: > @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 I like that wording. Florian, WDYT? Ludo=E2=80=99. From debbugs-submit-bounces@debbugs.gnu.org Tue Nov 22 09:47:21 2022 Received: (at 59383-done) by debbugs.gnu.org; 22 Nov 2022 14:47:21 +0000 Received: from localhost ([127.0.0.1]:50337 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxUYT-0002ek-AE for submit@debbugs.gnu.org; Tue, 22 Nov 2022 09:47:21 -0500 Received: from relay.yourmailgateway.de ([185.244.194.184]:38215) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oxUYR-0002ec-1T for 59383-done@debbugs.gnu.org; Tue, 22 Nov 2022 09:47:20 -0500 Received: from relay01-mors.netcup.net (localhost [127.0.0.1]) by relay01-mors.netcup.net (Postfix) with ESMTPS id 4NGnCn03btz8tcD; Tue, 22 Nov 2022 15:47:17 +0100 (CET) Authentication-Results: relay01-mors.netcup.net; dkim=permerror (bad message/signature format) Received: from policy01-mors.netcup.net (unknown [46.38.225.35]) by relay01-mors.netcup.net (Postfix) with ESMTPS id 4NGnCm6mlBz8G6P; Tue, 22 Nov 2022 15:47:16 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at policy01-mors.netcup.net X-Spam-Flag: NO X-Spam-Score: -2.9 X-Spam-Level: X-Spam-Status: No, score=-2.9 required=6.31 tests=[ALL_TRUSTED=-1, BAYES_00=-1.9] autolearn=ham autolearn_force=no Received: from mxe217.netcup.net (unknown [10.243.12.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by policy01-mors.netcup.net (Postfix) with ESMTPS id 4NGnCl5PK8z8sbY; Tue, 22 Nov 2022 15:47:14 +0100 (CET) Received: from florianrock64 (ip5b40a50f.dynamic.kabel-deutschland.de [91.64.165.15]) by mxe217.netcup.net (Postfix) with ESMTPSA id B756A9EA0A; Tue, 22 Nov 2022 15:47:10 +0100 (CET) From: "pelzflorian (Florian Pelz)" To: 59383-done@debbugs.gnu.org Subject: Re: bug#59383: [PATCH] doc: Call out potential for downgrade attacks with time-machine. References: <87v8nbjgck.fsf@pelzflorian.de> <8735af9i8b.fsf@nckx> <87wn7qn8rd.fsf@pelzflorian.de> <86a64kk11y.fsf@gmail.com> <87pmdfifov.fsf_-_@gnu.org> Date: Tue, 22 Nov 2022 15:47:09 +0100 In-Reply-To: <87pmdfifov.fsf_-_@gnu.org> ("Ludovic =?utf-8?Q?Court=C3=A8s?= =?utf-8?Q?=22's?= message of "Tue, 22 Nov 2022 08:58:08 +0100") Message-ID: <87o7szcahe.fsf@pelzflorian.de> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: B756A9EA0A X-Spamd-Result: default: False [-2.97 / 15.00]; BAYES_HAM(-4.37)[97.16%]; SUSPICIOUS_RECIPS(1.50)[]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_ZERO(0.00)[0]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:3209, ipnet:91.64.0.0/14, country:DE]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; TAGGED_RCPT(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; TO_DN_SOME(0.00)[]; FREEMAIL_CC(0.00)[gmail.com,tobias.gr,gnu.org] X-Rspamd-Server: rspamd-worker-8404 X-NC-CID: GFr7CAZ48F4eG4n7AjQhK0niODEFrc6S02qJqSndhnNNQI21OdK/GCCu X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 59383-done Cc: Ludovic =?utf-8?Q?Court=C3=A8s?= , Tobias Geerinckx-Rice , zimoun X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) zimoun=E2=80=99s wording is good; less alarmist. I used his words (with a period before @xref, no french spacing and a less alarmist commit message and Co-authored by line). Pushed as b8d4c323f5d089dd800b358143d5bae26c965404. Closing. Regards, Florian From unknown Sat Aug 09 20:34:11 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Wed, 21 Dec 2022 12:24:09 +0000 User-Agent: Fakemail v42.6.9 # This is a fake control message. # # The action: # bug archived. thanks # This fakemail brought to you by your local debbugs # administrator