| Log Message: |
Jails have a problem in that if the jail directory is world-readable,
an attacker with root access to the jail can create a setuid binary for
their own use in the host environment (if they also have this access),
thus breaking root in the host.
This exploit is impossible if the jail's files are not world-readable.
Add instructions to the man page on how to create a jail with the
correct permissions set.
PR: docs/156853
Submitted by: Chris Rees (utisoft at gmail dot com)
Reviewed by: cperciva (security parts)
MFC after: 9 days
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head/usr.sbin/jail/jail.8