UPDATING-HardenedBSD

[20170616] Changed default protection settings for text section
__HardenedBSD_version = 50 

       Fixes the (theoretically) last outstanding memory
       protection related weakness in HBSD's user-space detectable
       with paxtest.


[20170302] Enable CFI by default for amd64
__HardenedBSD_version = 49

	Enable WITH_CFI by default on HardenedBSD/amd64.
	Control-Flow Integrity (CFI) is an exploit mitigation
	technique developed in the clang/llvm project. Now that
	base has clang 4.0.0, which brings a linker that supports
	Link-Time Optimization (LTO), lld, we can now make use of
	CFI, which requires LTO.

	This also enables lld by default for amd64 and arm64. Disable
	CFI by setting WITHOUT_CFI in src.conf(5).

[20170112] Enable SafeStack by default for amd64
__HardenedBSD_version = 48

	Enable WITH_SAFESTACK by default on HardenedBSD/amd64.
	SafeStack is an exploit mitigation technique developed in the
	clang/llvm project, born in the Code-Pointer Integrity
	(CPI) project. Now that base has clang 3.9.1, which contains
	a more mature CFI/CPI implementation, SafeStack can be enabled
	by default for amd64.

	Disable SafeStack for base by setting WITHOUT_SAFESTACK in
	src.conf(5).

[20160820] Enable LibreSSL by default
__HardenedBSD_version = 47

	Enable WITH_LIBRESSL by default on HardenedBSD.
	After this we point we deliver LibreSSL as base
	SSL engine for HardenedBSD. The OpenSSL is still
	available, and accessable with WITHOUT_LIBRESSL=
	knob in src.conf.


[20160423] RELRO + BIND_NOW
__HardenedBSD_version = 46

	Enable RELRO + BIND_NOW for base.
	Introduce WITHOUT_RELRO and WITHOUT_BIND_NOW.
	Setting WITHOUT_RELRO also sets WITHOUT_BIND_NOW.


[20160408] PIEified base for amd64 and i386
__HardenedBSD_version = 45

	Remove WANTS_PIE.
	Default PIE for base for amd64 and i386 only.
	When PIE is enabled, compile non-static libraries with -fPIC.
	Default WITH_SHARED_TOOLCHAIN to enabled by default.

	If you encounter build problems during make buildworld,
	try to clean the object files directory, which is typically
	/usr/obj: 
	
		cd /usr/obj; rm -rf *
	
	And retry to build the world. This will require due to not
	proper cleaning mechanizm of FreeBSD's build framework.


[201603XX] noexec and ASLR changes
__HardenedBSD_version = 44

	Fixed noexec's paxflags parser to get usable system on
	bronen setups too.
	Changed ASLR stack randomization settings on 32 machines.

[20160316] ASLR cleanup
__HardenedBSD_version = 43

	Since the hardening.pax.aslr.*_len variables are no longer
	available outside of loader.conf(5), remove them from
	struct hbsd_features, which gets embedded in struct
	prison. This change makes the hardening.pax.aslr.*_len
	variables a global setting, rather than a per-jail setting.


[20160225] RTLD noexec
__HardenedBSD_version = 42

	Enforce nonexec thread stacks, driven by the RTLD.


[20160213] rewritten internals
__HardenedBSD_version = 41

	Changed hardenedBSD core structures.
	Dropped ptrace_hardening.
	Dropped ASLR bit settings.
	Fixed hbsd_update_build bug.
	Added skeleton file.
	Changed feature strings.
	Changed noexec implicit rules.


[20160123] add pax_get_hardenedbsd_version API
__HardenedBSD_version = 40

	Add pax_get_hardenedbsd_version() API to query hardening's version
	from kernel codes.

	Add new types, which represents the PAX_FLAGS.


[20151225] redo rework internal structures
__HardenedBSD_version = 39

	Change pax_get_prison(...) to pax_get_prison_td(...) where possible.
	Fix one segvguard related issue.
	Changed pax_elf signature.

	We reverted this code in version 37, because we observed weird
	issue, but this issues was unrelated to the reworked internals.
	The true root of the problem was a secadm bug and the issue fixed
	with version 38.


[20151218] reworked MAP_32BIT mmap randomization
__HardenedBSD_version = 38

	Previously the MAP_32BIT case mmap randomization was an ASR,
	to fix this and some other issue with the MAP_32BIT related
	mmap, implement a proper ASLR.

	Upstream fixed stability issues with higher order PID randomization


[20151208] revert the reworked internal structures
__HardenedBSD_version = 37

	revert: Change pax_get_prison(...) to pax_get_prison_td(...) where possible.
	revert: Changed pax_elf signature.


[20151206] rework internal structures
__HardenedBSD_version = 36

	Change pax_get_prison(...) to pax_get_prison_td(...) where possible.
	Change noexec's sysctl handlers.
	Fix one segvguard related issue.
	Fix randompid related issue.
	Changed pax_elf signature.


[20151123] changed proc structure : added p_timekeep_base
__HardenedBSD_version = 35

	Follow the recent VDSO changes from kib@.
	This required to introduce new field to struct proc.


[20151018] disabled lib32 build by default
__HardenedBSD_version = 34

	Do not build lib32 and 32bit related stuffs on 64bit platforms
	by default.


[20150924] changed stack-protector level
__HardenedBSD_version = 33

	Bump the default build settings from the --stack-protector
	to --stack-protector-strong.


[20150915] ASLR changes
__HardenedBSD_version = 32

	Changed default VDSO randomization from 20 bits to 28 bits.
	Fixed div by zero in rare cases in pax_aslr_init_vmspace.


[20150907] Reworked DISALLOWMAP32BIT and changes some internal functions
__HardenedBSD_version = 31

	Rename and correctly paxify the DISALLOWMAP32BIT.
	Changed pax flags setup.


[20150905] Added MAP32_PROTECT
__HardenedBSD_version = 30

	Added per-process mode to disable MAP_32BIT mode mmap(2).


[20150823] Fixed pkg bootstrap
__HardenedBSD_version = 29

	With FreeBSD commit 671f0b9, use of pubkey signature_type method is explicitly disallowed.
	This breaks bootstrapping with pubkey signature_type.


[20150715] Fixed vdso randomization
__HardenedBSD_version = 28

	Fixed and simplified vdso and stack mapping.


[20150706] Added shared-page (vdso) randomization
__HardenedBSD_version = 27

	This version brings in true stack randomization.
	Changed ASLR settings:
		vdso random : 20 bit


[20150701] Rewriten stack randomization, and bumped ASLR settings
__HardenedBSD_version = 26

	This version brings in true stack randomization.
	Changed ASLR settings:
		stack random : 26 -> 42 bit
		exec random : 21 -> 30 bit


[20150605] ASLR "rewrite" and NOEXEC fixes after jhb's vm_mmap.c changes 
__HardenedBSD_version = 25
__HardenedBSD_version = 24

	Move the mmap randomization to it's own place and add more state enforcements (KASSERTs).
	Added locking around pax_aslr_mmap(...).
	Factore out the MAP_32BIT related code from pax_aslr_mmap(...), and move to pax_aslr_mmap_map_32bit(...)


[20150604] fix ASLR - randomize the rtld's shared object too
__HardenedBSD_version = 23

	Randomize the rtld's address before load them in imgact_elf.c


[20150604] added PAX_NOTE_{,NO}SHLIBRANDOM extension
__HardenedBSD_version = 22

	This feature will fix the issue mentioned on issue #137


[20150528] Changed internal structure, removed hardening.pax.segvguard.debug sysctl
__HardenedBSD_version = 21

	Changed internal structure
	Removed hardening.pax.segvguard.debug sysctl


[20150415] Bumped stack randomization
__HardenedBSD_version = 20

	Increased stack randomization from 20 bit to 26 bit.


[20150415] Fixed stack randomization
__HardenedBSD_version = 19


[20150408] How to get HardenedBSD and HardenedBSD-ports?

	Without git/svnlite:

	    HardenedBSD source:

		# fetch https://github.com/HardenedBSD/hardenedBSD/archive/hardened/current/master.tar.gz -o hardenedbsd-src.tar.gz
		# tar xf hardenedbsd-src.tar.gz
		# mv hardenedBSD-hardened-current-master /usr/src

	    HardenedBSD ports:

		# fetch https://github.com/HardenedBSD/freebsd-ports/archive/master.tar.gz -o hardenedbsd-ports.tar.gz
		# tar xf hardenedbsd-ports.tar.gz
		# mv freebsd-ports-master /usr/ports

	    Secadm:

		# fetch https://github.com/HardenedBSD/secadm/archive/master.tar.gz -o secadm.tar.gz
		# tar xf secadm.tar.gz

	With git:

	    HardenedBSD-source:

		# git clone https://github.com/HardenedBSD/hardenedBSD.git /usr/src

	    HardenedBSD ports:

		# git clone https://github.com/HardenedBSD/freebsd-ports.git /usr/ports

	    Secadm:

		# git clone https://github.com/HardenedBSD/secadm.git

	With svnlite (much more slower than git version):

	    HardenedBSD-source:

		# svnlite co https://github.com/HardenedBSD/hardenedBSD.git /usr/src

	    HardenedBSD ports:

		# svnlite co https://github.com/HardenedBSD/freebsd-ports.git /usr/ports

	    Secadm:

		# svnlite co https://github.com/HardenedBSD/secadm.git


[20150404] Added secadm hook to rtld
__HardenedBSD_version = 18

Added integriforce secadm hook to rtld to validate
shared object before loading them.


[20150318] Merged first part of NOEXEC project
__HardenedBSD_version = 17

This is the first part of PaX's MPROTECT restriction:
* this merge brings per process level restriction settings
* eliminated the linux's sound related mmap weakness
* improved the logging
...

If you have problem with your application, then install
secadm:

 * from pkg:

	pkg install secadm

 * or from github:

	# git clone https://github.com/hardenedbsd/secadm
	# cd secadm
	# make && make install


[201502011] Changed kernel knobs

Added ``options PAX`` to enable the HardenedBSD framework.
All other PAX_* knob depends on PAX knob.


[20150131] Upgrading from systems before "HBSD: Revert the chacha20 import in full."

After the "HBSD: Revert the chacha20 import in full." commit
we lost the compatibility with the previous version, this
means ABI break, and the system is unable to properly boot.
In the background is the removed VM_INHERIT_ZERO flag, which
was previously used in libc.

The solution is to install the new world, before you booting to the new kernel.

1. make buildworld kernel
2. IMPORTANT: install world before you reboot
 2.1. mergemaster -p && make installworld && mergemaster
3. reboot
4. start in single user mode
5. cd /usr/src
6. make delete-old delete-old-libs
7. if you have buildworld or buildkernel error,
   where the cc aborting and dumping core,
   then you need to delete the content of /usr/obj directory:
 7.1 cd /usr/obj
 7.2 rm -rf *

And probably a full ports rebuild required too...