From: Chris Wright <chrisw@sous-sol.org>
To: Stephen Hemminger <stephen.hemminger@vyatta.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Chris Wright <chrisw@linux-foundation.org>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH] sysctl: permission check based on capability not euid
Date: Wed, 28 May 2008 13:14:00 -0700 [thread overview]
Message-ID: <20080528201400.GG30402@sequoia.sous-sol.org> (raw)
In-Reply-To: <20080528121200.54c04b5a@speedy>
* Stephen Hemminger (stephen.hemminger@vyatta.com) wrote:
> This patch modifies the permission checks for sysctl's from being based on uid=0 (root)
> to use the capability system. This matches the behavior of other OS's using sysctl's
> and capabilities. Linux has tried to get away from using uid=0 for security overrides
> and use capabilities instead.
>
> I was working on Quagga enhancement that involved enabling a sysctl, and it didn't
> work because is a safe daemon and drops privileges and resets its real/effective uid
> after initialization; it then re-enables only the capabilities when it needs to
> do some privileged operation. This wouldn't work because sysctl's were still using
> the root based permission check. The existing code in quagga to enable ip forwarding
> doesn't work for the same reason.
I don't think CAP_SYS_ADMIN makes sense for net.*, for example.
prev parent reply other threads:[~2008-05-28 20:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-28 19:12 [PATCH] sysctl: permission check based on capability not euid Stephen Hemminger
2008-05-28 20:14 ` Chris Wright [this message]
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