linux-kernel - Re: [RFC 0/5 v4] procfs: introduce hidepid=, hidenet=, gid= mount options

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]

Message-ID: <20110622101724.GA4278@albatros>
Date:	Wed, 22 Jun 2011 14:17:24 +0400
From:	Vasiliy Kulikov <segoon@...nwall.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
	Greg Kroah-Hartman <gregkh@...e.de>,
	"David S. Miller" <davem@...emloft.net>,
	Arnd Bergmann <arnd@...db.de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	linux-security-module@...r.kernel.org
Subject: Re: [RFC 0/5 v4] procfs: introduce hidepid=, hidenet=, gid= mount
 options

On Wed, Jun 22, 2011 at 10:45 +0400, Vasiliy Kulikov wrote:
> More generic solution (I'm not suggesting it, but merely discussing)
> would use some user-supplied set of files to restrict access to (or,
> better, the set of allowed files because white list is almost always
> better than black list).  Maybe this one:
> 
>     mount -t proc -o "pid_allow=exe,status,comm,oom_*" proc /proc
> 
> And without pid_allow it would behave like pid_allow=*.

>  "pid_allow=."
> would deny access to the whole /proc/PID.

I mean "pid_allow=", of course.

> This would be a bit inconsistent with current permissions because e.g.
> if use pid_allow=environ then environ file would not be accessible
> because of posix permissions.  Hierarchical mode (pid_allow=fd/1) is not
> allowed too.

For hierarchical mode: attr_allowed, tgid_allowed, tid_allowed.


Thanks,

-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
--
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/