The do_remount function in fs/namespace.c in the Linux kernel through
3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of
a bind mount, which allows local users to bypass an intended read-only
restriction and defeat certain sandbox protection mechanisms via a
"mount -o remount" command within a user namespace.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20140813 Re: CVE Request: ro bind mount bypass using user namespaces
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