Home page logo

fulldisclosure logo Full Disclosure mailing list archives

Re: TTY handling when executing code in lower-privileged context (su, virt containers)
From: Benji <me () b3nji com>
Date: Sat, 10 Nov 2012 18:58:37 +0000

Furthermore, the handling of user privileges to disallow root logins is to
stop (stupid) users doing stupid things, security wise. If a lot of users
weren't forced to use unprivileged accounts, all the processes you're
talking about running would be run as root. AFAIK security is used to
protect from the lowest denominator up, not top down.

On Sat, Nov 10, 2012 at 6:49 PM, Benji <me () b3nji com> wrote:

The advice weakens your system from a local perspective granted, but if an
attacker has a local user on your box already, it's already game over.

Yes, if you were a user with intelligence. I must've forgot that everyone
that uses a computer does so with sense.

On Sat, Nov 10, 2012 at 6:30 PM, Michal Zalewski <lcamtuf () coredump cx>wrote:

I think you've taken that far too literaly. My understanding of it is to
protect against a) brute force retardation b) dumb attackers.

The advice weakens the security of your system, because it means I
just need to compromise your unprivileged account (in which you run
your browser, mail client, and so on) to own the entire box.

As for the benefits, care to elaborate? I'm not sure what a) and b)
really mean. If you're worried about brute-force, don't use trivial
passwords. If you worry about opportunistic attacks, do that and then
patch your stuff every now and then.


Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]