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📄 CVE-2019-5597.py(2.22 KB)
📄 CVE-2019-5598.py(2.9 KB)
📄 Makefile(503 B)
📄 Makefile.depend(176 B)
📄 anchor.sh(2.04 KB)
📄 checksum.sh(2.51 KB)
📄 echo_inetd.conf(1.54 KB)
📄 forward.sh(4.85 KB)
📄 fragmentation.sh(4.1 KB)
📄 icmp.sh(2.51 KB)
📁 ioctl
📄 names.sh(1.78 KB)
📄 nat.sh(2.66 KB)
📄 pass_block.sh(5.1 KB)
📄 pfsync.sh(2.9 KB)
📄 rdr.sh(2.15 KB)
📄 route_to.sh(3.26 KB)
📄 set_skip.sh(3.18 KB)
📄 set_tos.sh(3.68 KB)
📄 src_track.sh(1.98 KB)
📄 synproxy.sh(2.68 KB)
📄 table.sh(4.18 KB)
📄 utils.subr(2.01 KB)

Editing: fragmentation.sh

# $FreeBSD$
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2017 Kristof Provost <kp@FreeBSD.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

. $(atf_get_srcdir)/utils.subr

atf_test_case "too_many_fragments" "cleanup"

too_many_fragments_head()
{
	atf_set descr 'IPv4 fragment limitation test'
	atf_set require.user root
}

too_many_fragments_body()
{
	pft_init

epair=$(vnet_mkepair)
	vnet_mkjail alcatraz ${epair}a

ifconfig ${epair}b inet 192.0.2.1/24 up
	jexec alcatraz ifconfig ${epair}a 192.0.2.2/24 up

ifconfig ${epair}b mtu 200
	jexec alcatraz ifconfig ${epair}a mtu 200

jexec alcatraz pfctl -e
	pft_set_rules alcatraz \
		"scrub all fragment reassemble"

# So we know pf is limiting things
	jexec alcatraz sysctl net.inet.ip.maxfragsperpacket=1024

# Sanity check
	atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2

# We can ping with < 64 fragments
	atf_check -s exit:0 -o ignore ping -c 1 -s 800 192.0.2.2

# Too many fragments should fail
	atf_check -s exit:2 -o ignore ping -c 1 -s 20000 192.0.2.2
}

too_many_fragments_cleanup()
{
	pft_cleanup
}

atf_test_case "v6" "cleanup"
v6_head()
{
	atf_set descr 'IPv6 fragmentation test'
	atf_set require.user root
	atf_set require.progs scapy
}

v6_body()
{
	pft_init

epair_send=$(vnet_mkepair)
	epair_link=$(vnet_mkepair)

vnet_mkjail alcatraz ${epair_send}b ${epair_link}a
	vnet_mkjail singsing ${epair_link}b

ifconfig ${epair_send}a inet6 2001:db8:42::1/64 no_dad up

jexec alcatraz ifconfig ${epair_send}b inet6 2001:db8:42::2/64 no_dad up
	jexec alcatraz ifconfig ${epair_link}a inet6 2001:db8:43::2/64 no_dad up
	jexec alcatraz sysctl net.inet6.ip6.forwarding=1

jexec singsing ifconfig ${epair_link}b inet6 2001:db8:43::3/64 no_dad up
	jexec singsing route add -6 2001:db8:42::/64 2001:db8:43::2
	route add -6 2001:db8:43::/64 2001:db8:42::2

jexec alcatraz ifconfig ${epair_send}b inet6 -ifdisabled
	jexec alcatraz ifconfig ${epair_link}a inet6 -ifdisabled
	jexec singsing ifconfig ${epair_link}b inet6 -ifdisabled
	ifconfig ${epair_send}a inet6 -ifdisabled

jexec alcatraz pfctl -e
	pft_set_rules alcatraz \
		"scrub fragment reassemble" \
		"block in" \
		"pass in inet6 proto icmp6 icmp6-type { neighbrsol, neighbradv }" \
		"pass in inet6 proto icmp6 icmp6-type { echoreq, echorep }"

# Host test
	atf_check -s exit:0 -o ignore \
		ping -6 -c 1 2001:db8:42::2

atf_check -s exit:0 -o ignore \
		ping -6 -c 1 -s 4500 2001:db8:42::2

atf_check -s exit:0 -o ignore\
		ping -6 -c 1 -b 70000 -s 65000 2001:db8:42::2

# Forwarding test
	atf_check -s exit:0 -o ignore \
		ping -6 -c 1 2001:db8:43::3

atf_check -s exit:0 -o ignore \
		ping -6 -c 1 -s 4500 2001:db8:43::3

atf_check -s exit:0 -o ignore\
		ping -6 -c 1 -b 70000 -s 65000 2001:db8:43::3

$(atf_get_srcdir)/CVE-2019-5597.py \
		${epair_send}a \
		2001:db8:42::1 \
		2001:db8:43::3
}

v6_cleanup()
{
	pft_cleanup
}

atf_init_test_cases()
{
	atf_add_test_case "too_many_fragments"
	atf_add_test_case "v6"
}

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Editing: fragmentation.sh

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