linux-kernel - Re: [PATCH 01/12] Security: Add CAP_COMPROMISE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 20 Mar 2013 09:45:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <matthew.garrett@...ula.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-security-module@...r.kernel.org" 
	<linux-security-module@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 01/12] Security: Add CAP_COMPROMISE_KERNEL

On 03/20/2013 08:14 AM, Matthew Garrett wrote:
> On Wed, 2013-03-20 at 08:03 -0700, H. Peter Anvin wrote:
>> CAP_SYS_RAWIO is definitely inappropriate there.
> 
> Ok. How do we fix that without breaking userspace that expects
> CAP_SYS_RAWIO to be sufficient?
> 

I don't think we can to some way, because when what you have is
fundamentally broken, it's hard to fix.

However, it is extremely likely that the number of affected applications
is vanishingly small.  There probably are a handful of apps that do
this, and I wouldn't be surprised if most of them simply run as root.

	-hpa

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/