+++ This bug was initially created as a clone of Bug #168206 +++
This issue was reported to bugtraq here:
The issue is that if a non root user is able to run umount -r, it is possible to
subvert the restrictions placed on a filesystem such as nosuid.
This issue also affects RHEL2.1
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.