full-disclosure - Re: [FD] Scope of Debian's /home/loser is with permissions 755, default umask 002

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Message-ID: <2d5799a5-9ab9-5e2f-088f-ae136ea610d7@riseup.net>
Date: Sat, 14 Nov 2020 07:58:31 +0000
From: bo0od <bo0od@...eup.net>
To: fulldisclosure@...lists.org
Subject: Re: [FD] Scope of Debian's /home/loser is with permissions 755,
 default umask 002

I see this is fixed in Whonix/Kicksecure which they are like hardened 
debian, One for anonymity (whonix), and one for clearnet (KickSecure). I 
doubt any distro fixed/hardened that.

Maybe this is interesting: 
https://www.whonix.org/wiki/Dev/Strong_Linux_User_Account_Isolation

Georgi Guninski:
> On Debian /home/loser is with permissions 755, default umask 0022
> 
> (If you don't understand the numbers, this means a lot of
> files are world readable).
> 
> On multiuser machines this sucks much.
> 
> Question: How much sensitive data can be read on default install?
> 
> Partial results:
> 
> 1. mutt (text email client) exposes ~/.mutt/muttrc,
> which might contain the imap password in plaintext.
> 
> 2. Some time ago on a multiuser debian mirror we found a lot of data,
> including the wordpress password of the admin.
> 
> 3. Anything created by EDITOR NEWFILE is readable, unless the directory
> prevents. This include root doing EDITOR /etc/NEWFILE
> 
> Debian said won't fix:
> https://www.openwall.com/lists/oss-security/2020/10/07/4
> 
> Consider contracting me for gnu/linux security,
> CV:  https://j.ludost.net/resumegg.pdf
> 
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