can't exec /usr/sbin/named-xfer: Permission denied

[Ralf Hildebrandt]

On Wed, Mar 28, 2001 at 01:56:13AM +0200, Brad Knowles wrote:

> 	Problem is, chroot() jails can be escaped, especially if you can 
> get root privileges in the jail.  Indeed, by far the vast majority of 
> security breaches involved taking an existing account (privileged or 
> not) and then using that to exceed your level of authorized access to 
> gain root privilege.

I collected some writeups on that issue, you might want to check:
http://www.stahl.bau.tu-bs.de/~hildeb/bind/