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
Since kib's change the stack guard is now ON by default,
this option in hardening menu of bsdinstall is no longer needed.
Submitted by: Bartlomiej Rutkowski <robak@FreeBSD.org>
Reviewed by: bapt
Approved by: bapt
MFC after: 1 day
Sponsored by: Pixeware LTD
Differential Revision: https://reviews.freebsd.org/D11686
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
As discussed previously, in order to introduce new OS hardening
defaults, we've added them to bsdinstall in 'off by default' mode.
It has been there for a while, so the next step is to change them
to 'on by defaul' mode, so that in future we could simply enable
them in base OS.
Reviewed by: brd
Approved by: adrian
Differential Revision: https://reviews.freebsd.org/D9641
The most recent version of bsdinstall does not seem to respect any of
the checkboxes in the "Choose the services you would like to be started
at boot" dialog. None of the chosen services end up in the rc.conf file
that is installed onto the target system.
This is caused by the bsdinstall/scripts/hardening script, which
implements the new hardening options dialog. The script starts by
overwriting the previously written rc.conf.services file:
echo -n > $BSDINSTALL_TMPETC/rc.conf.services
which is obviously incorrect. It should clear out rc.conf.hardening
instead.
Reviewed by: allanjude
PR: 211506
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D7387
This patch add new 'hardening' file responsible for new bsdinstall
'System Hardening' menu allowing users to set some sane and carefully
picked system security options (like random process id's, hiding
other users/groups processes and others).
All options are OFF by default in this patch due to POLA principle
with intention to turn change some of them to ON by default in future.
Reviewed by: adrian, allanjude, bdrewery, nwhitehorn
Approved by: adrian, allanjude
MFC after: 7 days
