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Date: Tue, 08 Jul 2008 19:30:02 +0800
From: Eugene Teo <>
Subject: Re: CVE-2008-2931 kernel: missing check before setting
 mount propagation

Eugene Teo wrote:
> The do_change_type routine in the Linux kernel has a missing check for
> capable(CAP_SYS_ADMIN). Even though the mount command restricts the
> changing of mountpoint type to only root users, it is possible for local
> unprivileged users to bypass and abuse this problem. More details can be
> found at:
> This affects kernel versions from 2.6.15-rc1 up to 2.6.22-rc1. The

Correction: It should be up to 2.6.21.

Eugene Teo / Red Hat Security Response Team

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