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From: daw@mozart.cs.berkeley.edu (David Wagner)
To: linux-kernel@vger.kernel.org
Subject: Re: Is writing to /dev/ramdom a security flaw (vserver project)
Date: 20 Oct 2001 00:26:45 GMT	[thread overview]
Message-ID: <9qqgc5$4ht$1@abraham.cs.berkeley.edu> (raw)
In-Reply-To: <20011019172309.4219c22e9a53@remtk.solucorp.qc.ca>

Jacques Gelinas  wrote:
>Is this a security issue if an administrator of a vserver is allowed to write
>in /dev/random ?

If you're talking about write(2), it should be safe, since the entropy
count is not affected.  If you're talking about doing an ioctl(2) on
/dev/random, this is risky (since root can modify the entropy counter),
but it looks like all those code paths are protected by a capability
check, so my guess is that you're probably ok this, too.

      parent reply	other threads:[~2001-10-20  0:26 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-19 22:23 Is writing to /dev/ramdom a security flaw (vserver project) Jacques Gelinas
2001-10-19 21:38 ` Christopher Friesen
2001-10-20  0:26 ` David Wagner [this message]

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