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Re: Package Manager Denies Permission to Install



On Wed, 2009-01-21 at 15:59 -0800, Kam Leo wrote:
> On Wed, Jan 21, 2009 at 2:25 PM, Craig White <craigwhite azapple com> wrote:
> > On Wed, 2009-01-21 at 13:42 -0800, Kam Leo wrote:
> >> On Wed, Jan 21, 2009 at 12:47 PM, Patrick O'Callaghan
> >> <pocallaghan gmail com> wrote:
> >> > On Thu, Jan 22, 2009 at 2:12 PM, Kevin Kofler <kevin kofler chello at> wrote:
> >> >> Richard Hughes wrote:
> >> >>> Sure, but my point if that GTK code is untrusted, and just not designed
> >> >>> to be run with elevated privileges. A buffer-overflow is an easy exploit
> >> >>> if the code is running as uid 0, whether running as setuid or as root.
> >> >>
> >> >> Why would you overflow a buffer on your own machine where you're already
> >> >> root? It makes sense to attack a setuid binary on a machine you're not root
> >> >> on, but it doesn't make sense to attack your own machine.
> >> >
> >> > Really?  In that case I invite you to visit my website evil.com and
> >> > click on a few links. Better still, log into my friendly server and
> >> > run a few of my apps. They're running on my machine, not yours. Of
> >> > course the GUI runs on your machine via X11 ...
> >> >
> >> > poc
> >>
> >> A GUI is not required to compromise a machine. No need to go after the
> >> root user either. Take a gander here:
> >> http://www.linuxsecurity.com/content/blogcategory/89/102/7/0/
> > ----
> > well now...there's a cogent argument.
> >
> > Suggesting that even though few of the applications that run on X are
> > audited for security when run as superuser, that it becomes acceptable
> > to do so because other exploits exist that don't require X to propagate.
> >
> > Interesting logical expansion
> >
> > Craig
> 
> The fallacy is believing you automatically obtain security by auditing
> applications running on X for execution by the superuser or preventing
> root from logging into X.

No, the fallacy is believing that security is either on or off, when in
fact there's *always* a tradeoff between effective security and
user-friendliness. Running a GUI as root greatly expands the number of
potential exploits, that's all.

poc


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