The JTAG tools can be used to gain superuser access to the system. The most basic way to do this would be to use the "shell" command.
It would be a large security hole to install the tools so that arbitrary users can run them with superuser rights (suid root); on the other hand probably a number of people might be tempted to do so in order to work around "permission denied" problems when trying to access a cable over parport or usb.
Running the tools as root is okay, but becoming root by just using the tools has to be impossible.
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Added a check in #801.