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From: Glen Barber <gjb@FreeBSD.org>
Date: Wed, 27 Jul 2011 01:57:24 +0000 (UTC)
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Subject: svn commit: r224463 - stable/7/usr.sbin/jail
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Author: gjb (doc committer)
Date: Wed Jul 27 01:57:24 2011
New Revision: 224463
URL: http://svn.freebsd.org/changeset/base/224463

Log:
  MFC 224286:
  
  Document the potential for jail escape.
  
  PR:		142341

Modified:
  stable/7/usr.sbin/jail/jail.8
Directory Properties:
  stable/7/usr.sbin/jail/   (props changed)

Modified: stable/7/usr.sbin/jail/jail.8
==============================================================================
--- stable/7/usr.sbin/jail/jail.8	Wed Jul 27 01:56:52 2011	(r224462)
+++ stable/7/usr.sbin/jail/jail.8	Wed Jul 27 01:57:24 2011	(r224463)
@@ -33,7 +33,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 17, 2010
+.Dd July 23, 2011
 .Dt JAIL 8
 .Os
 .Sh NAME
@@ -708,3 +708,10 @@ Currently, the simplest answer is to min
 offered on the host, possibly limiting it to services offered from
 .Xr inetd 8
 which is easily configurable.
+.Sh NOTES
+Great care should be taken when managing directories visible within the jail.
+For example, if a jailed process has its current working directory set to a
+directory that is moved out of the jail's chroot, then the process may gain
+access to the file space outside of the jail.
+It is recommended that directories always be copied, rather than moved, out
+of a jail.