mirror of
https://github.com/Kicksecure/security-misc.git
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150 lines
5.0 KiB
Plaintext
150 lines
5.0 KiB
Plaintext
## Copyright (C) 2012 - 2020 ENCRYPTED SUPPORT LP <adrelanos@riseup.net>
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## See the file COPYING for copying conditions.
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## Please use "/etc/permission-hardening.d/20_user.conf" or
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## "/usr/local/etc/permission-hardening.d/20_user.conf" for your custom
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## configuration. When security-misc is updated, this file may be overwritten.
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## File permission hardening.
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##
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## Syntax:
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## [filename] [mode] [owner] [group] [capability]
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##
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## To remove all SUID/SGID binaries in a directory, you can use the "nosuid"
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## argument.
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## TODO: white spaces inside file name untested and probably will not work.
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######################################################################
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# SUID disablewhitelist
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######################################################################
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## disablewhitelist disables below (or in lexically higher) files
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## exactwhitelist and matchwhitelist. Add these here (discouraged) or better
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## in file "/etc/permission-hardening.d/20_user.conf".
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## For example, if you are not using SELinux the following might make sense to
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## enable. TODO: research
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#/utempter/utempter disablewhitelist
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## If you are not going to use AppImages such as electrum Bitcoin wallet.
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#/fusermount disablewhitelist
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######################################################################
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# SUID exact match whitelist
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######################################################################
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/usr/bin/sudo exactwhitelist
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/bin/sudo exactwhitelist
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/usr/bin/bwrap exactwhitelist
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/bin/bwrap exactwhitelist
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/usr/lib/spice-gtk/spice-client-glib-usb-acl-helper exactwhitelist
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/usr/lib/chromium/chrome-sandbox exactwhitelist
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/usr/bin/pkexec exactwhitelist
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/usr/bin/pkexec.security-misc-orig exactwhitelist
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## https://forums.whonix.org/t/disable-suid-binaries/7706/61
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## Protect from 'chmod -x' (and SUID removal).
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## SUID will be removed below in separate step.
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/bin/mount exactwhitelist
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/usr/bin/mount exactwhitelist
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## There is a controversy about firejail but those who choose to install it
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## should be able to use it.
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## https://www.whonix.org/wiki/Dev/Firejail#Security
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/usr/bin/firejail exactwhitelist
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## In case you need to use 'su'. See also:
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## https://www.whonix.org/wiki/root#su
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#/bin/su exactwhitelist
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#/usr/bin/su exactwhitelist
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######################################################################
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# SUID exact match whitelist
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######################################################################
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## https://manpages.debian.org/buster/xserver-xorg-legacy/Xorg.wrap.1.en.html
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## https://lwn.net/Articles/590315/
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## http://forums.whonix.org/t/permission-hardening/8655/25
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#/usr/lib/xorg/Xorg.wrap whitelist
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######################################################################
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# SUID regex match whitelist - research required
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######################################################################
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/usr/lib/virtualbox/ matchwhitelist
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## https://github.com/QubesOS/qubes-core-agent-linux/blob/master/qubes-rpc/qfile-unpacker.c
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## match both:
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#/usr/lib/qubes/qfile-unpacker whitelist
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#/lib/qubes/qfile-unpacker
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/qubes/qfile-unpacker matchwhitelist
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## match both:
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#/usr/lib/policykit-1/polkit-agent-helper-1 matchwhitelist
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#/lib/policykit-1/polkit-agent-helper-1
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polkit-agent-helper-1 matchwhitelist
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######################################################################
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# SUID regex match whitelist
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######################################################################
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dbus-daemon-launch-helper matchwhitelist
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/utempter/utempter matchwhitelist
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## required for AppImages such as electrum Bitcoin wallet
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## https://forums.whonix.org/t/disable-suid-binaries/7706/57
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/fusermount matchwhitelist
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######################################################################
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# Permission Hardening
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######################################################################
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## Remove SUID from 'mount' but keep executable.
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## https://forums.whonix.org/t/disable-suid-binaries/7706/61
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/bin/mount 745 root root
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/usr/bin/mount 745 root root
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/home/ 0755 root root
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/home/user/ 0700 user user
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/root/ 0700 root root
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/boot/ 0700 root root
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/etc/permission-hardening.d 0600 root root
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/usr/local/etc/permission-hardening.d 0600 root root
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/lib/modules/ 0700 root root
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######################################################################
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# SUID/SGID Removal
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######################################################################
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## Remove all SUID/SGID binaries/libraries.
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/bin/ nosuid
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/usr/bin/ nosuid
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/usr/local/bin/ nosuid
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/sbin/ nosuid
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/usr/sbin/ nosuid
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/usr/local/sbin/ nosuid
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/lib/ nosuid
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/lib32/ nosuid
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/lib64/ nosuid
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/usr/lib/ nosuid
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/usr/lib32/ nosuid
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/usr/lib64/ nosuid
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/usr/local/lib/ nosuid
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/usr/local/lib32/ nosuid
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/usr/local/lib64/ nosuid
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######################################################################
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# Capability Removal
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######################################################################
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## Ping doesn't work with Tor anyway so its capabilities are removed to
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## reduce attack surface.
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## anon-apps-config does this.
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#/bin/ping 0744 root root none
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## TODO: research
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#/usr/lib/x86_64-linux-gnu/gstreamer1.0/grstreamer-1.0/gst-ptp-helper 0744 root root none
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