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265 Commits

Author SHA1 Message Date
madaidan
4d0de87f79
Disable unprivileged userfaultfd use again 2020-03-08 17:49:49 +00:00
madaidan
efb2683cfc
Hide unprivileged_userfaultfd error 2020-03-08 17:49:12 +00:00
Patrick Schleizer
284a491100
disable vm.unprivileged_userfaultfd=0 for now 
because broken

https://forums.whonix.org/t/kernel-hardening/7296/406

reverts "Restrict the userfaultfd() syscall to root as it can make heap sprays easier."

https://duasynt.com/blog/linux-kernel-heap-spray
 2020-03-08 08:07:10 -04:00
madaidan
6b64b36b01
Restrict the userfaultfd() syscall to root 2020-02-24 18:23:15 +00:00
madaidan
f6b6ab374e
Gather more entropy during boot 2020-02-16 19:51:32 +00:00
madaidan
a79ce7fa68
Document ldisc_autoload better 2020-02-15 17:30:21 +00:00
Patrick Schleizer
1e5946c795
Merge branch 'master' into sysrq 2020-02-15 10:41:52 +00:00
Patrick Schleizer
5124f8cebc
Merge pull request #61 from madaidan/disable_early_pci_dma 
Avoid holes in IOMMU
 2020-02-15 10:18:56 +00:00
madaidan
9b767139ef
Avoid holes in IOMMU 2020-02-14 18:52:01 +00:00
madaidan
d251c43344
Restrict the SysRq key 2020-02-14 18:17:20 +00:00
madaidan
0ea7dd161b
Restrict loading line disciplines to CAP_SYS_MODULE 2020-02-14 17:50:19 +00:00
Patrick Schleizer
ad6b766886
Merge pull request #57 from madaidan/sysctl 
Prevent symlink/hardlink TOCTOU races
 2020-02-13 18:40:58 +00:00
madaidan
700c7ed908
Create 40_cpu_mitigations.cfg 2020-02-12 18:42:13 +00:00
madaidan
ba0043b8a7
Update 40_kernel_hardening.cfg 2020-02-12 18:36:05 +00:00
madaidan
5cb21d0d4d
Prevent symlink/hardlink TOCTOU races 2020-02-12 18:03:23 +00:00
HulaHoop0
e4c6e897cf
kvm.nx_huge_pages=force 2020-02-03 16:06:46 +00:00
Patrick Schleizer
85d2aa1365
hide stdout (but not stderr) by sysctl during initramfs 2020-01-30 06:13:42 -05:00
Patrick Schleizer
b9d65338bc
unconditionally enable all CPU bugs (spectre, meltdown, L1TF, ...) 
this might reduce performance

* `spectre_v2=on`
* `spec_store_bypass_disable=on`
* `tsx=off`
* `tsx_async_abort=full,nosmt`

Thanks to @madaidan for the suggestion!

https://forums.whonix.org/t/should-all-kernel-patches-for-cpu-bugs-be-unconditionally-enabled-vs-performance-vs-applicability/7647
 2020-01-30 05:55:13 -05:00
Patrick Schleizer
c1a0da60be
set kernel boot parameter l1tf=full,force and nosmt=force 
https://forums.whonix.org/t/should-all-kernel-patches-for-cpu-bugs-be-unconditionally-enabled-vs-performance-vs-applicability/7647/17
 2020-01-30 00:46:48 -05:00
Patrick Schleizer
a37da1c968
add digits to drop-in file names 2020-01-24 04:39:06 -05:00
Patrick Schleizer
e0aa67677d
merge the many modprobe.d config files into 1 
and use a name starting with double digits

to make it easier to disable settings using a lexically higher config file
 2020-01-24 04:30:36 -05:00
Patrick Schleizer
6a4c493213
merge the many sysctl config files into 1 
and use a name starting with double digits

to make it easier to disable settings using a lexically higher config file
 2020-01-24 04:26:36 -05:00
Patrick Schleizer
6f8d89c6c5
error handling 2020-01-15 15:54:06 -05:00
madaidan
f7fde60b67
Process sysctl.conf too 2020-01-15 20:28:32 +00:00
Patrick Schleizer
528c5fc4c4
Merge branch 'master' into sysctl-initramfs 2020-01-15 11:02:03 +00:00
Patrick Schleizer
80159545a5
fix xfce4-power-manager xfpm-power-backlight-helper pkexec lxsudo popup 
https://forums.whonix.org/t/xfce4-power-manager-xfpm-power-backlight-helper-pkexec-lxsudo-popup/8764

do show lxqt-sudo password prompt if there is a sudoers exceptoin

improved pkexec wrapper logging
 2020-01-15 02:42:10 -05:00
madaidan
8c4e0ff1c4
Set sysctl values in initramfs 2020-01-12 21:37:37 +00:00
madaidan
a662a76a52
Blacklist vivid 2020-01-11 18:37:00 +00:00
Patrick Schleizer
f3ff32ddbb
Protect /bin/mount from 'chmod -x'. 
/bin/mount exactwhitelist
/usr/bin/mount exactwhitelist

Remove SUID from 'mount' but keep executable.

/bin/mount 745 root root
/usr/bin/mount 745 root root

https://forums.whonix.org/t/disable-suid-binaries/7706/61
 2019-12-30 06:39:24 -05:00
Patrick Schleizer
e5623fcd2b
comment 2019-12-29 04:21:52 -05:00
Patrick Schleizer
674840e6f9
/fusermount matchwhitelist 
unbreak AppImages such as electrum Bitcoin wallet

https://forums.whonix.org/t/disable-suid-binaries/7706/57
 2019-12-26 05:44:35 -05:00
Patrick Schleizer
ede536913d
no longer hardcode amd64 2019-12-24 06:00:41 -05:00
Patrick Schleizer
27a42a9da8
Merge pull request #50 from madaidan/modules 
Make /lib/modules unreadable
 2019-12-24 10:55:11 +00:00
Patrick Schleizer
ac49c55d1f
Merge pull request #49 from madaidan/kver 
Detect kernel upgrades
 2019-12-24 10:55:03 +00:00
madaidan
79241c5d09
Make /lib/modules unreadable 2019-12-23 20:28:29 +00:00
madaidan
98e88d1456
Detect kernel upgrades 2019-12-23 19:57:43 +00:00
madaidan
d1a0650fd9
Use only one slub_debug parameter 2019-12-23 19:44:52 +00:00
Patrick Schleizer
9d77d88a4d
comments 2019-12-23 09:39:50 -05:00
Patrick Schleizer
3e131174d5
comments 2019-12-23 05:00:35 -05:00
Patrick Schleizer
9f072ce4f9
comment 2019-12-23 03:46:02 -05:00
Patrick Schleizer
26fe9394ff
disable lockdown for now due to module loading 2019-12-23 03:41:54 -05:00
madaidan
535c258b83
More kernel hardening 2019-12-23 03:35:07 -05:00
Patrick Schleizer
11b4192fbd
comments 2019-12-23 03:28:42 -05:00
Patrick Schleizer
2152fa2d61
comment 2019-12-23 02:38:53 -05:00
Patrick Schleizer
f8f2e6c704
fix disablewhitelist feature 2019-12-23 02:35:13 -05:00
Patrick Schleizer
47ddcad0c0
rename keyword whitelist to exactwhitelist 
add new keyword disablewhitelist

refactoring
 2019-12-23 02:29:47 -05:00
Patrick Schleizer
1ff56625a1
polkit-agent-helper-1 matchwhitelist to match both 
- /usr/lib/policykit-1/polkit-agent-helper-1 matchwhitelist
- /lib/policykit-1/polkit-agent-helper-1
 2019-12-23 01:42:03 -05:00
Patrick Schleizer
d484b299ea
matchwhitelist /qubes/qfile-unpacker to match both 
- /usr/lib/qubes/qfile-unpacker whitelist
- /lib/qubes/qfile-unpacker
 2019-12-23 01:38:31 -05:00
Patrick Schleizer
58a4e0bc7d
dbus-daemon-launch-helper matchwhitelist 2019-12-22 19:12:10 -05:00
Patrick Schleizer
15e3a2832d
comment 2019-12-22 18:57:23 -05:00
Patrick Schleizer
6eb8fd257a
suid utempter/utempter matchwhitelist 
to cover both:

/usr/lib/x86_64-linux-gnu/utempter/utempter
/lib/x86_64-linux-gnu/utempter/utempter
 2019-12-22 18:56:36 -05:00
Patrick Schleizer
bce02ffdc0
Merge pull request #47 from madaidan/msr 
Blacklist CPU MSRs
 2019-12-22 15:26:07 +00:00
madaidan
dd93b11321
Blacklist CPU MSRs 2019-12-22 13:52:43 +00:00
Patrick Schleizer
2ddf7b5db5
/lib/ nosuid 2019-12-21 14:06:51 -05:00
Patrick Schleizer
2350e0f5d0
Merge remote-tracking branch 'origin/master' 2019-12-21 06:57:10 -05:00
Patrick Schleizer
efd65a3f15
Merge pull request #45 from madaidan/apparmor 
Delete apparmor profiles
 2019-12-21 11:56:31 +00:00
Patrick Schleizer
3ea587187e
no need to exclude xorg nosuid on Debian 
http://forums.whonix.org/t/permission-hardening/8655/25
 2019-12-21 06:53:07 -05:00
madaidan
c28ddf5c4d
Delete usr.lib.security-misc.pam_tally2-info 2019-12-20 22:44:31 +00:00
madaidan
cfe69dd669
Delete usr.lib.security-misc.permission-lockdown 2019-12-20 22:44:27 +00:00
Patrick Schleizer
d220bb3bc4
suid /usr/lib/chromium/chrome-sandbox whitelist 2019-12-20 13:07:01 -05:00
Patrick Schleizer
77b3dd5d6b
comments 2019-12-20 13:02:33 -05:00
Patrick Schleizer
d7bd477e73
add "/usr/lib/xorg/Xorg.wrap whitelist" 
until this is researched

https://manpages.debian.org/buster/xserver-xorg-legacy/Xorg.wrap.1.en.html
https://lwn.net/Articles/590315/
 2019-12-20 12:59:27 -05:00
Patrick Schleizer
17e8605119
add matchwhitelist feature 
add "/usr/lib/virtualbox/ matchwhitelist"
 2019-12-20 12:57:24 -05:00
Patrick Schleizer
3fab387669
suid /usr/bin/firejail whitelist 
There is a controversy about firejail but those who choose to install it
should be able to use it.
https://www.whonix.org/wiki/Dev/Firejail#Security
 2019-12-20 12:50:35 -05:00
Patrick Schleizer
d3f16a5bf4
sgid /usr/lib/qubes/qfile-unpacker whitelist 2019-12-20 12:47:10 -05:00
Patrick Schleizer
508ec0c6fa
comment 2019-12-20 12:34:07 -05:00
Patrick Schleizer
1b569ea790
comment 2019-12-20 12:32:36 -05:00
Patrick Schleizer
e28da89253
/bin/sudo whitelist / /bin/bwrap whitelist 2019-12-20 09:48:06 -05:00
Patrick Schleizer
6d30e3b4a2
do not remove suid from whitelisted binaries ever 
https://forums.whonix.org/t/permission-hardening/8655/13
 2019-12-20 08:13:23 -05:00
Patrick Schleizer
48fe7312bf
update config 2019-12-20 05:57:41 -05:00
Patrick Schleizer
87d820d84c
comment 2019-12-20 05:54:16 -05:00
Patrick Schleizer
46466c12ad
parse drop-in config folder rather than only one config file 2019-12-20 05:49:11 -05:00
Patrick Schleizer
6c8127e3cd
remove "/lib/ nosuid" from permission hardening 
Takes 1 minute to parse. No SUID binaries there by default.
remount-secure mounts it with nosuid anyhow.
Therefore no processing it here.
 2019-12-20 05:29:37 -05:00
Patrick Schleizer
788a2c1ba3
comment 2019-12-20 03:45:01 -05:00
madaidan
9df7407286
Remove SUID bits 2019-12-19 17:01:33 +00:00
Patrick Schleizer
729fa26eca
use pam_acccess only for /etc/pam.d/login 
remove "Allow members of group 'ssh' to login."
remove "+:ssh:ALL EXCEPT LOCAL"
 2019-12-12 09:00:08 -05:00
madaidan
6c564f6e95
Create permission-hardening.conf 2019-12-08 16:50:11 +00:00
Patrick Schleizer
9432d16378
/usr/bin/cat mrix, 2019-12-07 12:13:42 -05:00
Patrick Schleizer
c1800b13fe
separate group "ssh" for incoming ssh console permission 
Thanks to @madaidan

https://forums.whonix.org/t/etc-security-hardening-console-lockdown-pam-access-access-conf/8592/16
 2019-12-07 11:26:39 -05:00
Patrick Schleizer
8636d2f629
add securetty 2019-12-07 06:51:10 -05:00
Patrick Schleizer
8b3f5a555b
add console lockdown to pam info output 2019-12-07 06:25:45 -05:00
Patrick Schleizer
021b06dac9
add hvc0 to hvc9 2019-12-07 06:04:45 -05:00
Patrick Schleizer
8a59662a44
comment 2019-12-07 06:02:45 -05:00
Patrick Schleizer
cda6724755
add pts/0 to pts/9 2019-12-07 05:56:57 -05:00
Patrick Schleizer
218cbddba9
comment 2019-12-07 05:52:06 -05:00
Patrick Schleizer
6479c883bf
Console Lockdown. 
Allow members of group 'console' to use tty1 to tty7. Everyone else except
members of group 'console-unrestricted' are restricted from using console
using ancient, unpopular login methods such as using /bin/login over networks,
which might be exploitable. (CVE-2001-0797)

Not enabled by default in this package since this package does not know which
users shall be added to group 'console'.

In new Whonix builds, user 'user" will be added to group 'console' and
pam console-lockdown enabled by package anon-base-files.

/usr/share/pam-configs/console-lockdown

/etc/security/access-security-misc.conf

https://forums.whonix.org/t/etc-security-hardening/8592
 2019-12-07 05:40:20 -05:00
Patrick Schleizer
8cf5ed990a
comment 2019-12-05 15:52:24 -05:00
madaidan
30289c68c2
Enable reverse path filtering 2019-12-05 20:13:10 +00:00
Patrick Schleizer
0c25a96b59
description / comments 2019-12-03 02:18:32 -05:00
madaidan
5da2a27bf0
Distrust the CPU for initial entropy 2019-12-02 16:43:00 +00:00
madaidan
d9d6d07714
/dev/pts/[0-9]* rw, 2019-11-26 17:12:12 +00:00
Patrick Schleizer
d32024a3da
/usr/sbin/pam_tally2 mrix, 
https://forums.whonix.org/t/apparmor-for-complete-system-including-init-pid1-systemd-everything-full-system-mac-policy/8339/152
 2019-11-23 05:53:19 -05:00
Patrick Schleizer
81e4f580af
etc/apparmor.d/usr.lib.security-misc.permission-lockdown: /usr/bin/chmod mrix, 2019-11-19 15:29:02 +00:00
Patrick Schleizer
477d476bb1
etc/apparmor.d/usr.lib.security-misc.pam_tally2-info: add '#include <abstractions/base>' 2019-11-10 08:29:44 -05:00
Patrick Schleizer
11dc23bf08
etc/apparmor.d/usr.lib.security-misc.permission-lockdown: add '#include <abstractions/base>' 2019-11-10 08:28:32 -05:00
Patrick Schleizer
9f2932faab
/usr/bin/id rix, 2019-11-09 13:32:21 -05:00
Patrick Schleizer
94d40c68d4
do not set kernel boot parameter page_poison=1 in Qubes since does not work 
https://github.com/QubesOS/qubes-issues/issues/5212#issuecomment-533873012
 2019-11-05 10:02:55 -05:00
Patrick Schleizer
f57702c158
comments; copyright 2019-11-05 09:55:43 -05:00
Patrick Schleizer
b55c2fd62e
Enables punycode (network.IDN_show_punycode) by default in Thunderbird 
to make phising attacks more difficult. Fixing URL not showing real Domain
Name (Homograph attack).

https://forums.whonix.org/t/enable-network-idn-show-punycode-by-default-in-thunderbird-to-fix-url-not-showing-real-domain-name-homograph-attack-punycode/8415
 2019-11-03 02:50:51 -05:00
Patrick Schleizer
e1375802eb
apparmor fix 
https://forums.whonix.org/t/apparmor-for-complete-system-including-init-pid1-systemd-everything-full-system-mac-policy/8339/67
 2019-10-31 16:32:28 +00:00