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On 04/07/2011 08:33 AM, yersinia wrote:
On Thu, Apr 7, 2011 at 1:04 PM, Christoph A. <casmls(a)gmail.com>
wrote:
> Hi,
>
> in the light of the security vulnerability in the ISC DHCP client
> [1][2][3], the obvious question for a fedora/rh/centos user is:
> Does SELinux prevent dhclient from accessing my $HOME (user_home_dir_t)
> and /media (mnt_t)?
> How strictly confined is dhcpc_t?
In my knowledge of selinux nobody in the selinux world can access
home directory by default. And this also true for dhcpc. I have not
found, also on fc12, rilevant permission given
to dhcpc_t on user_home_dir_t and /mnt_t : the only found are for or
reading the fs attribute and similar read permission.
Best Regards
--
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You can check the access using sesesearch
On F15 I see
sesearch -A -s dhcpc_t -t user_home_type
Found 2 semantic av rules:
allow daemon user_tmp_t : file { getattr append } ;
allow daemon user_home_t : file { getattr append } ;
Meaning that SELinux would allow dhcpc_t to append to a file in the
homedir IFF it was passed as an open file descriptor.
That would be the only allowed access.
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