diff -Nru casper-1.378/debian/changelog casper-1.379/debian/changelog
--- casper-1.378/debian/changelog	2016-08-18 16:23:20.000000000 -0700
+++ casper-1.379/debian/changelog	2016-09-30 13:59:45.000000000 -0700
@@ -1,3 +1,11 @@
+casper (1.379) yakkety; urgency=medium
+
+  * scripts/casper-bottom/53disable_unattended_upgrades:
+    - Disable the security allowed origin as it can fill a live environment.
+      (LP: #1619188)
+
+ -- Brian Murray <brian@ubuntu.com>  Fri, 30 Sep 2016 13:57:37 -0700
+
 casper (1.378) yakkety; urgency=medium
 
   * scripts/casper-bottom/52gnome_initial_setup:
diff -Nru casper-1.378/scripts/casper-bottom/53disable_unattended_upgrades casper-1.379/scripts/casper-bottom/53disable_unattended_upgrades
--- casper-1.378/scripts/casper-bottom/53disable_unattended_upgrades	1969-12-31 16:00:00.000000000 -0800
+++ casper-1.379/scripts/casper-bottom/53disable_unattended_upgrades	2016-09-30 14:00:28.000000000 -0700
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+PREREQ=""
+DESCRIPTION="Disabling security unattended-upgrades..."
+
+prereqs()
+{
+       echo "$PREREQ"
+}
+
+case $1 in
+# get pre-requisites
+prereqs)
+       prereqs
+       exit 0
+       ;;
+esac
+
+. /scripts/casper-functions
+
+log_begin_msg "$DESCRIPTION"
+
+# Stop downloading and installing security updates automatically
+# as they can fill up a Live CD or presistent environment. (LP: #1619188)
+SECURITY='"${distro_id}:${distro_codename}-security";'
+if grep -q "^\s\+$SECURITY$" /etc/apt/apt.conf.d/50unattended-upgrades; then
+    sed -i "s/\(\s\+\)$SECURITY/\/\/\1$SECURITY/" /etc/apt/apt.conf.d/50unattended-upgrades
+fi
+
+log_end_msg