linux-kernel - Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem file

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, 6 Apr 2016 11:52:30 -0700 (PDT)
From:	Christian Kujau <lists@...dbynature.de>
To:	ed@...sec.com
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dan Rosenberg <dan.j.rosenberg@...il.com>,
	Dave Jones <davej@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Kernel Hardening <kernel-hardening@...ts.openwall.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] KERNEL: resource: Fix bug on leakage in /proc/iomem
 file

On Wed, 6 Apr 2016, ed@...sec.com wrote:
> First, I wrote your attached patch, but then I thought zeroing other
> /proc/iomem values would be better. So I changed it.

On my systems, /proc/iomem, /proc/ioports and others get their 
world-readable bits removed during bootup - I guess that would mitigate 
this issue too?

Christian.
-- 
BOFH excuse #184:

loop found in loop in redundant loopback