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89f6723288
(e.g. traceroute with icmp)
ok henning, jsing
Also extend the test case to cover this scenario.
PR: 280701
Obtained from: OpenBSD
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
145 lines
4.2 KiB
Bash
145 lines
4.2 KiB
Bash
#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2019 Kristof Provost <kp@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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. $(atf_get_srcdir)/utils.subr
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common_dir=$(atf_get_srcdir)/../common
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atf_test_case "cve_2019_5598" "cleanup"
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cve_2019_5598_head()
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{
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atf_set descr 'Test CVE-2019-5598'
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atf_set require.user root
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atf_set require.progs scapy
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}
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cve_2019_5598_body()
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{
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pft_init
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epair_in=$(vnet_mkepair)
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epair_out=$(vnet_mkepair)
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ifconfig ${epair_in}a 192.0.2.1/24 up
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ifconfig ${epair_out}a up
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vnet_mkjail alcatraz ${epair_in}b ${epair_out}b
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jexec alcatraz ifconfig ${epair_in}b 192.0.2.2/24 up
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jexec alcatraz ifconfig ${epair_out}b 198.51.100.2/24 up
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jexec alcatraz sysctl net.inet.ip.forwarding=1
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jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05
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jexec alcatraz route add default 198.51.100.3
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route add -net 198.51.100.0/24 192.0.2.2
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jexec alcatraz pfctl -e
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pft_set_rules alcatraz "block all" \
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"pass in proto udp to 198.51.100.3 port 53" \
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"pass out proto udp to 198.51.100.3 port 53"
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atf_check -s exit:0 env PYTHONPATH=${common_dir} \
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$(atf_get_srcdir)/CVE-2019-5598.py \
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--sendif ${epair_in}a \
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--recvif ${epair_out}a \
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--src 192.0.2.1 \
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--to 198.51.100.3
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}
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cve_2019_5598_cleanup()
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{
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pft_cleanup
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}
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atf_test_case "ttl_exceeded" "cleanup"
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ttl_exceeded_head()
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{
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atf_set descr 'Test that we correctly translate TTL exceeded back'
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atf_set require.user root
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}
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ttl_exceeded_body()
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{
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pft_init
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epair_srv=$(vnet_mkepair)
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epair_int=$(vnet_mkepair)
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epair_cl=$(vnet_mkepair)
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vnet_mkjail srv ${epair_srv}a
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jexec srv ifconfig ${epair_srv}a 192.0.2.1/24 up
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jexec srv route add default 192.0.2.2
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vnet_mkjail int ${epair_srv}b ${epair_int}a
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jexec int sysctl net.inet.ip.forwarding=1
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jexec int ifconfig ${epair_srv}b 192.0.2.2/24 up
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jexec int ifconfig ${epair_int}a 203.0.113.2/24 up
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vnet_mkjail nat ${epair_int}b ${epair_cl}b
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jexec nat ifconfig ${epair_int}b 203.0.113.1/24 up
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jexec nat ifconfig ${epair_cl}b 198.51.100.2/24 up
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jexec nat sysctl net.inet.ip.forwarding=1
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jexec nat route add default 203.0.113.2
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vnet_mkjail cl ${epair_cl}a
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jexec cl ifconfig ${epair_cl}a 198.51.100.1/24 up
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jexec cl route add default 198.51.100.2
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jexec nat pfctl -e
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pft_set_rules nat \
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"nat on ${epair_int}b from 198.51.100.0/24 -> (${epair_int}b)" \
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"block" \
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"pass inet proto udp" \
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"pass inet proto icmp icmp-type { echoreq }"
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# Sanity checks
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atf_check -s exit:0 -o ignore \
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jexec cl ping -c 1 198.51.100.2
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atf_check -s exit:0 -o ignore \
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jexec cl ping -c 1 203.0.113.1
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atf_check -s exit:0 -o ignore \
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jexec cl ping -c 1 203.0.113.2
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atf_check -s exit:0 -o ignore \
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jexec cl ping -c 1 192.0.2.1
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echo "UDP"
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atf_check -s exit:0 -e ignore -o match:".*203.0.113.2.*" \
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jexec cl traceroute 192.0.2.1
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jexec nat pfctl -Fs
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echo "ICMP"
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atf_check -s exit:0 -e ignore -o match:".*203.0.113.2.*" \
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jexec cl traceroute -I 192.0.2.1
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}
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ttl_exceeded_cleanup()
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{
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pft_cleanup
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}
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atf_init_test_cases()
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{
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atf_add_test_case "cve_2019_5598"
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atf_add_test_case "ttl_exceeded"
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}
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