[refpolicy] [mmap zero conditional for unconfined patch ] 1/1] Allow unconfined domains to mmap low conditionally.

[dwalsh@redhat.com (Daniel J Walsh)]

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On 09/03/2010 10:53 AM, Christopher J. PeBenito wrote:
> On 09/01/10 11:54, Dominick Grift wrote:
>> Allow unconfined domains to mmap low conditionally.
> 
> I'm very concerned about adding this to all unconfined domains, even if 
> its conditional.
> 
> Is this from the Fedora policy?
> 
>> Signed-off-by: Dominick Grift<domg472@gmail.com>
>> ---
>> :100644 100644 416e668... a1bfac5... M	policy/modules/system/unconfined.if
>>   policy/modules/system/unconfined.if |    1 +
>>   1 files changed, 1 insertions(+), 0 deletions(-)
>>
>> diff --git a/policy/modules/system/unconfined.if b/policy/modules/system/unconfined.if
>> index 416e668..a1bfac5 100644
>> --- a/policy/modules/system/unconfined.if
>> +++ b/policy/modules/system/unconfined.if
>> @@ -37,6 +37,7 @@ interface(`unconfined_domain_noaudit',`
>>   	kernel_unconfined($1)
>>   	corenet_unconfined($1)
>>   	dev_unconfined($1)
>> +	domain_mmap_low($1)
>>   	domain_unconfined($1)
>>   	domain_dontaudit_read_all_domains_state($1)
>>   	domain_dontaudit_ptrace_all_domains($1)
> 

Yes.  The problem is not adding it, proves to be useless.  Since an
unconfined domain can do

Download mmap_zero_breakin /tmp/
chcon -t wine_exec_t /tmp/mmap_zero_breakin
/tmp/mmap_zero_breakin

Removing this line will just cause AVC's from random wine apps and add
no security.
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