On Thu, Jul 19, 2018 at 06:17:46PM +0200, Lukas Vrabec via refpolicy wrote:
> Hi All,
>
> I found one thing in refpolicy which I don't completely understand.
>
> In "policy/support/misc_patterns.spt" there is definition of
> "domain_transition_pattern" and this contains line:
> allow $1 $2:file { getattr open read execute };
>
> There is missing map permission.
>
> However in "policy/support/misc_macros.spt" there is definition of
> "can_exec" and it contains allow rule:
> define(`can_exec',`allow $1 $2:file { mmap_exec_file_perms ioctl lock
> execute_no_trans };')
This should just use mmap_exec_file_perms
>
> There is a mmap_exec_file_perms which contains:
> define(`mmap_exec_file_perms',`{ getattr open map read execute ioctl }')
>
> Map is present in can_exec().
>
> So for domain transitions we don't allow map permission from calling
> domain on binary type but in can_exec macro there is map permission.
>
> I think this is a bug and in "domain_transition_pattern" there should be
> this line:
> allow $1 $2:file { getattr open read execute map };
This should just use mmap_exec_file_perms as well
>
> instead of:
> allow $1 $2:file { getattr open read execute };
>
> Am I right or missing something?
>
> Thanks for help!
> Lukas.
permission sets provide a single point of failure and should used as much as possible
These were overlooked and because of this we now have a good example what the purpose of permission sets and patterns is.
>
> --
> Lukas Vrabec
> Software Engineer, Security Technologies
> Red Hat, Inc.
>
> _______________________________________________
> refpolicy mailing list
> refpolicy@xxxxxxxxxxxxxx
> http://oss.tresys.com/mailman/listinfo/refpolicy
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