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Add option to bsdinstall to disable insecure console, update stack guard option

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This patch adds new bsdinstall option to hardening section that allows users
to change this behaviour to secure one and updates stack guard option so it
would set the value of relevant sysctl to 512 (2MB)

Submitted by:	Bartek Rutkowski
Reviewed by:	adrian, bapt, emaste
Approved by:	bapt, emaste
MFC after:	1 day
Sponsored by:	Pixeware LTD
Differential Revision:	https://reviews.freebsd.org/D9700
This commit is contained in:
Bartek Rutkowski 2017-07-05 13:37:27 +00:00
parent 8f99208721
commit 82ec242f2e
2 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
usr.sbin/bsdinstall/scripts/config
View File

@ -35,6 +35,11 @@ rm $BSDINSTALL_TMPETC/rc.conf.*
cat $BSDINSTALL_CHROOT/etc/sysctl.conf $BSDINSTALL_TMPETC/sysctl.conf.* >> $BSDINSTALL_TMPETC/sysctl.conf
rm $BSDINSTALL_TMPETC/sysctl.conf.*
if [ -f $BSDINSTALL_TMPTEC/ttys.hardening ]; then
cat $BSDINSTALL_TMPTEC/ttys.hardening > $BSDINSTALL_TMPTEC/ttys
rm $BSDINSTALL_TMPTEC/ttys.hardening
fi
cp $BSDINSTALL_TMPETC/* $BSDINSTALL_CHROOT/etc
cat $BSDINSTALL_TMPBOOT/loader.conf.* >> $BSDINSTALL_TMPBOOT/loader.conf

8
usr.sbin/bsdinstall/scripts/hardening
View File

@ -42,10 +42,11 @@ FEATURES=$( dialog --backtitle "FreeBSD Installer" \
"3 read_msgbuf" "Disable reading kernel message buffer for unprivileged users" ${read_msgbuf:-off} \
"4 proc_debug" "Disable process debugging facilities for unprivileged users" ${proc_debug:-off} \
"5 random_pid" "Randomize the PID of newly created processes" ${random_pid:-off} \
"6 stack_guard" "Insert stack guard page ahead of the growable segments" ${stack_guard:-off} \
"6 stack_guard" "Set stack guard buffer size to 2MB" ${stack_guard:-off} \
"7 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \
"8 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \
"9 disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \
"9 secure_console" "Enable console password prompt" ${secure_console:-off} \
2>&1 1>&3 )
exec 3>&-
@ -69,7 +70,7 @@ for feature in $FEATURES; do
echo kern.randompid=$(jot -r 1 9999) >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
fi
if [ "$feature" = "stack_guard" ]; then
echo security.bsd.stack_guard_page=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
echo security.bsd.stack_guard_page=512 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
fi
if [ "$feature" = "clear_tmp" ]; then
echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
@ -80,5 +81,8 @@ for feature in $FEATURES; do
if [ "$feature" = "disable_sendmail" ]; then
echo 'sendmail_enable="NONE"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
fi
if [ "$feature" = "secure_console" ]; then
sed "s/unknown off secure/unknown off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening
fi
done