Thank you, unknown genius!

Rahul Sundaram sundaram at fedoraproject.org
Sat Apr 12 22:47:36 UTC 2008


Les Mikesell wrote:
> Bruno Wolff III wrote:
> 
>>>> Bruno is noting that the current methods of exploitation tend to be web
>>>> pages, flash, java, media files and a firewall isn't going to be of 
>>>> much
>>>> help with this type of intrusion but selinux clearly could be a 
>>>> layer of
>>>> use here.
>>> Does it actually prevent browser plugins from doing things that the 
>>> running user can't do in the default configuration?
>>
>> Yes.
> 
> I thought plugins ran as libraries within the same process. SELinux can 
> prevent them from loading which isn't particularly useful. How can it 
> control separately what a plugin can do without breaking the browser's 
>  own ability to it?

I already gave you the link earlier. Nspluginwrapper is installed by 
default which can run plugins in a separate memory address making it 
possible to confine it by policy. If a flash plugin tries to access 
files under .ssh for example, SELinux policy can prevent that as a 
obvious violation.

Rahul




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