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220 Commits

Author SHA1 Message Date
Patrick Schleizer
5f0dd8270b
consistent use of quotes 2020-03-21 14:14:35 -04:00
Patrick Schleizer
66ea1a3a12
minor 2020-03-21 14:14:15 -04:00
Patrick Schleizer
23bd7ead59
remove trailing space 2020-03-21 14:12:42 -04:00
madaidan
89ada11cf9
Only remount if already mounted read-only 2020-03-21 17:49:07 +00:00
madaidan
c8826d6702
Fix sysctl-initramfs logs 2020-03-21 17:15:25 +00:00
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