Re: [gentoo-hardened] New GCC options: -fcf-protection & -fstack-clash-protection

[Tóth Attila]

I'm not a lawyer either, but it's not legal to copy RAP, especially since
the great crisis. It's trademarked and protected. It's a pity some
companies abused the goodwill of the developers and misused grsec
technologies in the past.
Dw.
-- 
dr Tóth Attila, Radiológus, 06-20-825-8057
Attila Toth MD, Radiologist, [phone]

2019.Február 24.(V) 19:18 időpontban Javier Juan Martinez Cabezon ezt írta:
>
> It's would be feasible to include Grsec RAP gcc plugin in gentoo hardened?
>
> I think it would be a better alternative  than fcf-protection does
>
>
> On 24/02/19 16:16, "Tóth Attila" wrote:
>> Dear Guillaume,
>>
>> I'm not a Gentoo Dev either.
>>
>> If there's a place to promote useful gcc flags from their security
>> aspect,
>> Gentoo Hardened is a good place to become a leader of such efforts -
>> like
>> it happened in the past.
>>
>> 1. Regarding fcf-protection:
>> "Currently the x86 GNU/Linux target provides an implementation based on
>> Intel Control-flow Enforcement Technology (CET)."
>> - anybody knows which Intel processor actually supports that since its
>> announcement in 2016?
>> - also it worth to take a look at on these comments by Spender @
>> grsecurity:
>> https://grsecurity.net/effectiveness_of_intel_cet_against_code_reuse_attacks.php
>> It would be good if hardware developers would discuss their plans with
>> more security experts before they put something into production.
>>
>> 2. Regarding stack-clash
>> "Most targets do not fully support stack clash protection."
>> - some information would be helpful to elaborate a little bit more on
>> "not
>> fully" and exactly which targets we are talking about. Anybody has a
>> more
>> detailed documentation?
>>
>> Best regards:
>> Dw.
>>
>
>