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[FD] Scope of Debian's /home/loser is with permissions 755, default umask 002
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Scope of Debian's /home/loser is with permissions 755, default umask 002
- From: Georgi Guninski <gguninski@xxxxxxxxx>
- Date: Thu, 12 Nov 2020 13:26:57 +0200
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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