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bsdinstall(8) hardening menu: Utilize new kern.randompid=1 behaviour

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Enabling the PID randomization option in bsdinstall(8)'s hardening menu
now randomizes the effective value of kern.randompid on each boot.

Previous behaviour:
When kern.randompid was enabled via the the bsdinstall(8) hardening menu,
a random value was generated and placed in the systems /etc/sysctl.conf as
kern.randompid=value
This makes the value of kern.randompid static across reboots.

New behaviour:
When kern.randompid is enabled via the bsdinstall(8) hardening menu, the
line kern.randompid=1 is placed in the systems /etc/sysctl.conf.
This takes advantage of a new kernel feature and makes the value of
kern.randompid be randomized by the kernel on each reboot.

Submitted by:	Marie Helene Kvello-Aune <marieheleneka@gmail.com>
Reviewed by:	des
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D12433
This commit is contained in:
allanjude 2017-10-02 14:19:31 +00:00
parent f74bf3f764
commit be5ef94d23
1 changed files with 1 additions and 1 deletions
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2
usr.sbin/bsdinstall/scripts/hardening
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@ -66,7 +66,7 @@ for feature in $FEATURES; do
echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
fi
if [ "$feature" = "random_pid" ]; then
echo kern.randompid=$(jot -r 1 9999) >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
echo kern.randompid=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
fi
if [ "$feature" = "clear_tmp" ]; then
echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening