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Date: Wed, 13 Jun 2018 12:54:54 +0300
From: Georgi Guninski <guninski@...inski.com>
To: oss-security@...ts.openwall.com
Subject: Re: Are `su user' and/or `sudo -u user sh' considered
 dangerous?

On Wed, Jun 13, 2018 at 10:40:43AM +0300, Georgi Guninski wrote:
> Is there POC for relatively new distros?

debian 8 and 9 are vulnerable to su - hostile:
https://j.ludost.net/blog/archives/2018/06/13/ancient_su_-_hostile_vulnerability_in_debian_8_and_9/index.html

what about the second potential vulnerability: reading root's tty after
the session is closed with something like tee(1) ?

several sources suggest disabling TIOCSTI or using setsid(), are they
enough?

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