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From: Tobias Geerinckx-Rice via Bug reports for GNU Guix <bug-guix@gnu.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: 37744@debbugs.gnu.org,
	GNU Guix maintainers <guix-maintainers@gnu.org>,
	guix-security@gnu.org
Subject: bug#37744: Per-user profile directory hijack (CVE-2019-17365 for Nix)
Date: Mon, 14 Oct 2019 13:53:35 +0200	[thread overview]
Message-ID: <87y2xno85o.fsf@nckx> (raw)
In-Reply-To: <87blujsqq0.fsf@gnu.org>

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Ludo',

Thanks for your report :-p

The 1777 is obviously very bad, no question.  However: question:

Ludovic Courtès 写道:
> I don’t see how to let the daemon create ‘per-user/$USER’ on 
> behalf of
> the client for clients connecting over TCP.  Or we’d need to add 
> a
> challenge mechanism or authentication.

I need more cluebat please: say I'm an attacker and connect to 
your daemon (over TCP, why not), asking it to create an empty 
‘per-user/ludo’.

Assuming the daemon creates it with sane permissions (say 0755) & 
without any race conditions, what's my evil plan now?

Kind regards,

T G-R

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  reply	other threads:[~2019-10-14 11:54 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-14  7:47 bug#37744: Per-user profile directory hijack (CVE-2019-17365 for Nix) Ludovic Courtès
2019-10-14  7:58 ` Ludovic Courtès
2019-10-14 11:53   ` Tobias Geerinckx-Rice via Bug reports for GNU Guix [this message]
2019-10-14 16:37     ` Maxim Cournoyer
2019-10-15 12:34     ` Ludovic Courtès
2019-10-15 14:31       ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16  6:57         ` Ludovic Courtès
2019-10-16 10:22           ` Ludovic Courtès
2019-10-16 13:25             ` Ludovic Courtès
2019-10-16 14:22               ` pelzflorian (Florian Pelz)
2019-10-16 15:16                 ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16 15:19                   ` pelzflorian (Florian Pelz)
2019-10-16 15:23                     ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16 17:05                       ` Ludovic Courtès
2019-10-16 19:50                         ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16 19:55                           ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16 21:40                             ` Ludovic Courtès
2019-10-16 21:41                             ` Ludovic Courtès
2019-10-16 19:58                         ` Julien Lepiller
2019-10-16 21:38                           ` Ludovic Courtès
2019-10-16 15:37                 ` pelzflorian (Florian Pelz)
2019-10-16 21:39                   ` Ludovic Courtès
2019-10-17  2:58                     ` pelzflorian (Florian Pelz)
2019-10-17  3:01                       ` pelzflorian (Florian Pelz)
2019-10-16 20:28               ` Ludovic Courtès
2019-10-17 16:18               ` Ludovic Courtès
2019-10-17 19:01                 ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-17 20:25                   ` Ludovic Courtès
2019-10-18  2:21                     ` Bengt Richter
2019-10-18 14:36                       ` Ludovic Courtès
2019-10-19  1:32                         ` Bengt Richter
2019-10-16 14:12             ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-10-16 20:01               ` Ludovic Courtès
2019-10-16 16:28             ` Julien Lepiller

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