oss-security - Re: CVE request: kernel: problem with NFS v4 client handling of MAY_EXEC in nfs

Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers

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Date: Wed, 20 May 2009 12:06:09 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE request: kernel: problem with NFS v4 client
 handling of MAY_EXEC in nfs_permission

Eugene Teo wrote:
> Frank Filz reported: the problem is that permission checking is skipped
> if atomic open is possible, but when exec opens a file, it just opens it
> O_READONLY which means EXEC permission will not be checked at that time.

Upstream commit: 7ee2cb7f32b299c2b06a31fde155457203e4b7dd

Thanks, Eugene

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