Alexander Popov [Tue, 24 Mar 2020 11:14:20 +0000 (14:14 +0300)]
Small syctl cleanup
Alexander Popov [Mon, 23 Mar 2020 15:25:28 +0000 (18:25 +0300)]
Merge pull request #34 from madaidan/grapheneos
GrapheneOS is the continuation of CopperheadOS
madaidan [Sun, 22 Mar 2020 19:34:23 +0000 (19:34 +0000)]
GrapheneOS is the continuation of CopperheadOS
Alexander Popov [Fri, 20 Mar 2020 20:24:03 +0000 (23:24 +0300)]
CopperheadOS disables the kernel's CONFIG_AIO feature
It isn't used or exposed by the base system and is a dubious feature.
It performs no better than thread pools and it can still block, along
with having coverage of only a tiny portion of blocking system calls
even when considering only commonly used system calls for IO.
There are no known compatibility issues caused by having this disabled.
Since this is such a dubious niche feature, it's also very poorly tested
and it doesn't get much attention. Proposed improvements have been blocked
based on the concern that POSIX AIO is such a bad interface that trying
to improve/extend it would be harmful. Following the lead of CopperheadOS
on this front has been proposed and accepted upstream for the recommended
Android kernel configuration used to derive device specific configurations.
https://github.com/AndroidHardeningArchive/documentation/blob/master/technical_overview.md#attack-surface-reduction
Alexander Popov [Fri, 20 Mar 2020 19:56:22 +0000 (22:56 +0300)]
KSPP now recommends PAGE_TABLE_ISOLATION for X86_32
Alexander Popov [Fri, 20 Mar 2020 19:48:15 +0000 (22:48 +0300)]
Update KSPP recommendations
Alexander Popov [Wed, 18 Mar 2020 15:03:56 +0000 (18:03 +0300)]
INTEL_IOMMU is available for X86_32
Alexander Popov [Wed, 18 Mar 2020 15:03:20 +0000 (18:03 +0300)]
Move VMSPLIT_3G to 'userspace_hardening'
CONFIG_VMSPLIT_3G=y is for maximal userspace memory area and maximal ASLR.
It works both for ARM and X86_32.
Alexander Popov [Wed, 18 Mar 2020 11:27:45 +0000 (14:27 +0300)]
Style fix
Alexander Popov [Wed, 18 Mar 2020 11:27:17 +0000 (14:27 +0300)]
IOMMU_SUPPORT is needed for all architectures
Alexander Popov [Wed, 18 Mar 2020 11:06:50 +0000 (14:06 +0300)]
SECURITY_WRITABLE_HOOKS and SECURITY_SELINUX_DISABLE mean the same
Alexander Popov [Wed, 18 Mar 2020 09:18:31 +0000 (12:18 +0300)]
Add CLIP OS recommendation about X86_CPUID
Alexander Popov [Wed, 18 Mar 2020 09:17:55 +0000 (12:17 +0300)]
Fix RANDOM_TRUST_BOOTLOADER check
Alexander Popov [Wed, 18 Mar 2020 09:16:09 +0000 (12:16 +0300)]
LOCKDOWN update - part II
That commit contains changes in the checks that I made after learning
the upstreamed LOCKDOWN
Alexander Popov [Wed, 18 Mar 2020 09:10:10 +0000 (12:10 +0300)]
LOCKDOWN update - part I
That features didn't change in the upstreamed version of LOCKDOWN
Alexander Popov [Wed, 18 Mar 2020 08:12:13 +0000 (11:12 +0300)]
Don't restrict arch for "is not set" checks
That would simplify things
Alexander Popov [Tue, 17 Mar 2020 17:41:26 +0000 (20:41 +0300)]
SECURITY_LOCKDOWN_LSM is recommended by CLIP OS
Alexander Popov [Sun, 8 Mar 2020 21:47:18 +0000 (00:47 +0300)]
Add CONFIG_INTEGRITY for userspace hardening
Alexander Popov [Sun, 8 Mar 2020 20:53:52 +0000 (23:53 +0300)]
Fix the comments
Alexander Popov [Sun, 8 Mar 2020 20:53:34 +0000 (23:53 +0300)]
Don't show all checks from all supported platforms in debug_mode
Alexander Popov [Sat, 7 Mar 2020 20:39:23 +0000 (23:39 +0300)]
Improve 'dunno' report in debug_mode
Alexander Popov [Fri, 6 Mar 2020 22:15:42 +0000 (01:15 +0300)]
Add SECURITY_LOADPIN_ENFORCE check
Alexander Popov [Fri, 6 Mar 2020 22:15:04 +0000 (01:15 +0300)]
Update CLIP OS kernel security documentation
Alexander Popov [Fri, 6 Mar 2020 21:53:06 +0000 (00:53 +0300)]
Add CLIP OS recommendation about CONFIG_STAGING
Alexander Popov [Fri, 6 Mar 2020 21:50:08 +0000 (00:50 +0300)]
Add CLIP OS recommendation about CONFIG_RANDOM_TRUST_BOOTLOADER
Alexander Popov [Fri, 6 Mar 2020 21:37:33 +0000 (00:37 +0300)]
Update the README
Alexander Popov [Fri, 6 Mar 2020 21:35:22 +0000 (00:35 +0300)]
Improve debug_mode a lot
The debug_mode enables:
- reporting about unknown kernel options in the config,
- showing all checks from all supported platforms,
- verbose printing of ComplexOptChecks (OR, AND).
Alexander Popov [Fri, 6 Mar 2020 21:31:50 +0000 (00:31 +0300)]
Improve the table header
Alexander Popov [Fri, 6 Mar 2020 21:24:38 +0000 (00:24 +0300)]
Drop unused OptCheck printing
Alexander Popov [Thu, 5 Mar 2020 20:21:13 +0000 (23:21 +0300)]
Update 'decision' for new KSPP recommendations
Alexander Popov [Thu, 5 Mar 2020 20:11:55 +0000 (23:11 +0300)]
Update KSPP recommendations
Alexander Popov [Thu, 5 Mar 2020 11:07:24 +0000 (14:07 +0300)]
Update the README
Alexander Popov [Thu, 5 Mar 2020 10:39:15 +0000 (13:39 +0300)]
LDISC_AUTOLOAD can be disabled since v5.1
This fixes the false positive report about LDISC_AUTOLOAD for old kernels
Alexander Popov [Thu, 5 Mar 2020 10:38:02 +0000 (13:38 +0300)]
REFCOUNT_FULL is enabled by default since v5.5
Alexander Popov [Thu, 5 Mar 2020 10:37:32 +0000 (13:37 +0300)]
Add kernel version checks for complex checks with logical operations
Nice, like it :)
And move config_checklist to other globals by the way.
Alexander Popov [Thu, 5 Mar 2020 10:32:43 +0000 (13:32 +0300)]
Add kernel version detection
Alexander Popov [Thu, 5 Mar 2020 09:07:33 +0000 (12:07 +0300)]
Simplify perform_checks()
Alexander Popov [Wed, 4 Mar 2020 20:20:19 +0000 (23:20 +0300)]
Fix versions in KSPP recommendations
Alexander Popov [Wed, 4 Mar 2020 14:47:10 +0000 (17:47 +0300)]
Fix the name for ClearLinux config
Alexander Popov [Wed, 4 Mar 2020 12:38:13 +0000 (15:38 +0300)]
STACKPROTECTOR_PER_TASK is now default for ARM
Alexander Popov [Wed, 4 Mar 2020 12:29:34 +0000 (15:29 +0300)]
SECURITY_WRITABLE_HOOKS is not disabled by default
Alexander Popov [Wed, 4 Mar 2020 12:26:40 +0000 (15:26 +0300)]
Include GCC_PLUGINS to defconfig
This option is now enabled by default in case of compiler support.
Alexander Popov [Wed, 4 Mar 2020 12:16:47 +0000 (15:16 +0300)]
Update defconfigs (v5.5)
Alexander Popov [Thu, 27 Feb 2020 17:29:59 +0000 (20:29 +0300)]
Merge branch 'config-updates-from-hackurx'
Refers to PR #31.
Thanks to @HacKurx for his work.
Loïc [Wed, 26 Feb 2020 10:10:21 +0000 (11:10 +0100)]
Update of the kconfig-hardened-check.py part
Loïc [Wed, 26 Feb 2020 09:55:46 +0000 (10:55 +0100)]
Add link for clearlinux
Loïc [Wed, 26 Feb 2020 09:53:04 +0000 (10:53 +0100)]
Add clearlinux-master
config check is finished: 'OK' - 74 / 'FAIL' - 49
Loïc [Mon, 24 Feb 2020 20:07:51 +0000 (21:07 +0100)]
Update to 5.3.0-28-generic (LTS HWE)
config check is finished: 'OK' - 50 / 'FAIL' - 73
Loïc [Mon, 24 Feb 2020 17:41:04 +0000 (18:41 +0100)]
Remove debian-stretch.config
No need to support old stable versions
Loïc [Mon, 24 Feb 2020 17:38:36 +0000 (18:38 +0100)]
Add link for amazonlinux2
Loïc [Mon, 24 Feb 2020 17:36:23 +0000 (18:36 +0100)]
Update to 4.14.165-133.209.amzn2.x86_64
config check is finished: 'OK' - 44 / 'FAIL' - 79
Loïc [Mon, 24 Feb 2020 17:18:48 +0000 (18:18 +0100)]
Update to 5.4.21
config check is finished: 'OK' - 55 / 'FAIL' - 68
Loïc [Mon, 24 Feb 2020 17:16:20 +0000 (18:16 +0100)]
Update to openSUSE-15.1
config check is finished: 'OK' - 36 / 'FAIL' - 87
Loïc [Mon, 24 Feb 2020 17:14:18 +0000 (18:14 +0100)]
Update to 5.3.16 (SLE15-SP2)
config check is finished: 'OK' - 47 / 'FAIL' - 76
Loïc [Mon, 24 Feb 2020 17:12:12 +0000 (18:12 +0100)]
Update to SLE15-SP2 and openSUSE-15.1
Loïc [Mon, 24 Feb 2020 17:08:01 +0000 (18:08 +0100)]
Update to 5.4.21
config check is finished: 'OK' - 87 / 'FAIL' - 36
Loïc [Mon, 24 Feb 2020 17:04:23 +0000 (18:04 +0100)]
Update to 5.5.5-pentoo
config check is finished: 'OK' - 84 / 'FAIL' - 39
Loïc [Mon, 24 Feb 2020 17:02:25 +0000 (18:02 +0100)]
Update of some links
Loïc [Mon, 24 Feb 2020 16:53:48 +0000 (17:53 +0100)]
Update to 5.4.1 (uek6)
config check is finished: 'OK' - 52 / 'FAIL' - 71
Loïc [Mon, 24 Feb 2020 16:47:31 +0000 (17:47 +0100)]
Update to 4.18.0-147.5.1.el8_1.x86_64
config check is finished: 'OK' - 47 / 'FAIL' - 76
Loïc [Mon, 24 Feb 2020 16:43:54 +0000 (17:43 +0100)]
Update to config-4.19.0-8-amd64
config check is finished: 'OK' - 54 / 'FAIL' - 69
Alexander Popov [Tue, 14 Jan 2020 10:28:25 +0000 (13:28 +0300)]
Fix INIT_ON_FREE_DEFAULT_ON vs PAGE_POISONING issue #28
PAGE_POISONING is a debugging feature.
It provides less erasing than INIT_ON_FREE_DEFAULT_ON.
Join these checks with OR giving preference to INIT_ON_FREE_DEFAULT_ON.
Thanks to @madaidan for the details.
Also drop my previous recommendations about CONFIG_PAGE_POISONING_NO_SANITY
and CONFIG_PAGE_POISONING_ZERO.
Alexander Popov [Tue, 14 Jan 2020 09:35:38 +0000 (12:35 +0300)]
Answer the question about CONFIG_PANIC_ON_OOPS
Thanks to @madaidan
Refers to #29
Alexander Popov [Sat, 11 Jan 2020 12:05:11 +0000 (15:05 +0300)]
Recommend disabling VIDEO_VIVID
The vivid driver is for testing. It doesn't require any special hardware.
It is shipped in Ubuntu, Debian, Arch Linux, SUSE Linux Enterprise and openSUSE.
On Ubuntu the devices created by this driver are available to the normal user,
since Ubuntu applies RW ACL when the user is logged in.
See the disclosure of CVE-2019-18683 which I've found and fixed in vivid driver:
https://www.openwall.com/lists/oss-security/2019/11/02/1
Alexander Popov [Fri, 10 Jan 2020 14:41:14 +0000 (17:41 +0300)]
Take some ideas from NixOS/nixpkgs hardened kernel config
Add CONFIG_SECURITY_SAFESETID (y) and CONFIG_SECURITY_WRITABLE_HOOKS (n).
Refers to the pull request #27.
Alexander Popov [Mon, 2 Dec 2019 14:23:57 +0000 (17:23 +0300)]
Pretty printing
Alexander Popov [Fri, 29 Nov 2019 13:56:32 +0000 (16:56 +0300)]
Version 0.5.3 (supports Linux kernel v5.3)
Alexander Popov [Fri, 29 Nov 2019 13:53:29 +0000 (16:53 +0300)]
Add the link to Linux Kernel Defence Map
Alexander Popov [Fri, 29 Nov 2019 13:25:59 +0000 (16:25 +0300)]
Update the README
Alexander Popov [Fri, 29 Nov 2019 13:22:43 +0000 (16:22 +0300)]
Update defconfigs
Alexander Popov [Fri, 29 Nov 2019 13:21:42 +0000 (16:21 +0300)]
RANDOMIZE_BASE is now enabled by default on arm64
Alexander Popov [Thu, 28 Nov 2019 21:11:07 +0000 (00:11 +0300)]
x86_32: INTEL_IOMMU is not enabled by default - fix the reason
Alexander Popov [Thu, 28 Nov 2019 21:07:48 +0000 (00:07 +0300)]
X86_INTEL_UMIP is now X86_UMIP
Alexander Popov [Thu, 28 Nov 2019 21:07:21 +0000 (00:07 +0300)]
x86_64: more hardening options are enabled by default - change the reason
Alexander Popov [Thu, 28 Nov 2019 17:24:55 +0000 (20:24 +0300)]
Improve the list of the kernel parameters in TODO
Alexander Popov [Thu, 28 Nov 2019 17:23:04 +0000 (20:23 +0300)]
Add CLIP OS links
Alexander Popov [Thu, 28 Nov 2019 16:56:13 +0000 (19:56 +0300)]
Update the column width
Alexander Popov [Thu, 28 Nov 2019 16:54:55 +0000 (19:54 +0300)]
Some of my recommendations are used by CLIP OS, change the `reason` field
Alexander Popov [Thu, 28 Nov 2019 16:30:01 +0000 (19:30 +0300)]
Don't recommend disabling IKCONFIG anymore
That info is needed for this script :)
Alexander Popov [Thu, 28 Nov 2019 16:28:52 +0000 (19:28 +0300)]
Save more hardening sysctls for TODO
Alexander Popov [Thu, 28 Nov 2019 16:27:53 +0000 (19:27 +0300)]
Update CLIP OS doc
Alexander Popov [Thu, 28 Nov 2019 09:09:36 +0000 (12:09 +0300)]
Group security policies together
Also update the name of the lockdown feature (merged into v5.4).
Alexander Popov [Thu, 28 Nov 2019 09:07:11 +0000 (12:07 +0300)]
Add INIT_ON_ALLOC_DEFAULT_ON and INIT_ON_FREE_DEFAULT_ON introduced in v5.3
Alexander Popov [Thu, 28 Nov 2019 09:06:27 +0000 (12:06 +0300)]
Add RODATA_FULL_DEFAULT_ENABLED for ARM64
Alexander Popov [Thu, 28 Nov 2019 07:32:49 +0000 (10:32 +0300)]
Add info about Debian and AOSP kernel configs to links.txt
Alexander Popov [Thu, 28 Nov 2019 07:17:57 +0000 (10:17 +0300)]
Add Debian Buster kernel config
Alexander Popov [Thu, 28 Nov 2019 07:17:07 +0000 (10:17 +0300)]
Add AOSP kernel config for Pixel 3a
Alexander Popov [Fri, 23 Aug 2019 16:09:36 +0000 (19:09 +0300)]
Introduce the versioning
At the Chaos Communication Camp 2019 @jelly told that it would be nice to add the kconfig-hardened-check to Arch Linux.
So I add versioning to make it happen.
Thanks @jelly, nice to meet you!
Alexander Popov [Fri, 23 Aug 2019 12:48:43 +0000 (15:48 +0300)]
Update the script output in the README
Alexander Popov [Fri, 23 Aug 2019 10:35:53 +0000 (13:35 +0300)]
Add HARDEN_BRANCH_PREDICTOR and HARDEN_EL2_VECTORS
Alexander Popov [Fri, 23 Aug 2019 11:40:41 +0000 (14:40 +0300)]
Bring more order to the offsets (style fix)
Alexander Popov [Thu, 22 Aug 2019 10:43:46 +0000 (13:43 +0300)]
Add INIT_STACK_ALL as an alternative to GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
Alexander Popov [Thu, 22 Aug 2019 10:35:32 +0000 (13:35 +0300)]
Add SHUFFLE_PAGE_ALLOCATOR from v5.2
Alexander Popov [Thu, 22 Aug 2019 10:34:49 +0000 (13:34 +0300)]
Add some new sysctls (to remember them)
Alexander Popov [Mon, 8 Jul 2019 14:07:18 +0000 (17:07 +0300)]
Merge pull request #22 from adrianopol/master
#20 fix: use right quotes in json output
Thanks @adrianopol
Andrew Petelin [Sun, 7 Jul 2019 19:24:41 +0000 (22:24 +0300)]
#20 fix: use right quotes in json output
Alexander Popov [Mon, 24 Jun 2019 12:05:51 +0000 (15:05 +0300)]
Do code refactoring without changing the functionality
Changes:
- get rid of checklist global variable,
- improve print_checks().
Alexander Popov [Mon, 24 Jun 2019 11:04:11 +0000 (14:04 +0300)]
Merge branch 'json-support'
Thanks to @adrianopol
Alexander Popov [Mon, 24 Jun 2019 10:51:35 +0000 (13:51 +0300)]
json: Fix minor things and update the README
Andrew Petelin [Fri, 21 Jun 2019 19:56:23 +0000 (22:56 +0300)]
add --json option