Date: Sun, 3 Jan 2021 22:18:48 GMT From: Kristof Provost <kp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 0fc80e44f600 - stable/12 - pf tests: Test CVE-2019-5598 Message-ID: <202101032218.103MIm5L020474@gitrepo.freebsd.org>
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The branch stable/12 has been updated by kp: URL: https://cgit.FreeBSD.org/src/commit/?id=0fc80e44f600b65830da93b7b56e47250f978f06 commit 0fc80e44f600b65830da93b7b56e47250f978f06 Author: Kristof Provost <kp@FreeBSD.org> AuthorDate: 2019-03-22 07:39:28 +0000 Commit: Kristof Provost <kp@FreeBSD.org> CommitDate: 2021-01-03 20:26:49 +0000 pf tests: Test CVE-2019-5598 Verify that pf correctly drops inconsistent ICMP packets (i.e. where the IP src/dst do not match the IP src/dst in the ICMP packet. (cherry picked from commit 7de4bd92b8a1f510c88ea3b5af0bcb106af6ba11) --- tests/sys/netpfil/pf/CVE-2019-5598.py | 130 ++++++++++++++++++++++++++++++++++ tests/sys/netpfil/pf/Makefile | 7 +- tests/sys/netpfil/pf/icmp.sh | 99 ++++++++++++++++++++++++++ 3 files changed, 234 insertions(+), 2 deletions(-) diff --git a/tests/sys/netpfil/pf/CVE-2019-5598.py b/tests/sys/netpfil/pf/CVE-2019-5598.py new file mode 100644 index 000000000000..648b8ef9d6f0 --- /dev/null +++ b/tests/sys/netpfil/pf/CVE-2019-5598.py @@ -0,0 +1,130 @@ +#!/usr/local/bin/python2.7 + +import argparse +import scapy.all as sp +import sys +from sniffer import Sniffer + +def check_icmp_error(args, packet): + ip = packet.getlayer(sp.IP) + if not ip: + return False + if ip.dst != args.to[0]: + return False + + icmp = packet.getlayer(sp.ICMP) + if not icmp: + return False + if icmp.type != 3 or icmp.code != 3: + return False + + return True + +def main(): + parser = argparse.ArgumentParser("CVE-2019-icmp.py", + description="CVE-2019-icmp test tool") + parser.add_argument('--sendif', nargs=1, + required=True, + help='The interface through which the packet will be sent') + parser.add_argument('--recvif', nargs=1, + required=True, + help='The interface on which to check for the packet') + parser.add_argument('--src', nargs=1, + required=True, + help='The source IP address') + parser.add_argument('--to', nargs=1, + required=True, + help='The destination IP address') + + args = parser.parse_args() + + # Send the allowed packet to establish state + udp = sp.Ether() / \ + sp.IP(src=args.src[0], dst=args.to[0]) / \ + sp.UDP(dport=53, sport=1234) + sp.sendp(udp, iface=args.sendif[0], verbose=False) + + # Start sniffing on recvif + sniffer = Sniffer(args, check_icmp_error) + + # Send the bad error packet + icmp_reachable = sp.Ether() / \ + sp.IP(src=args.src[0], dst=args.to[0]) / \ + sp.ICMP(type=3, code=3) / \ + sp.IP(src="4.3.2.1", dst="1.2.3.4") / \ + sp.UDP(dport=53, sport=1234) + sp.sendp(icmp_reachable, iface=args.sendif[0], verbose=False) + + sniffer.join() + if sniffer.foundCorrectPacket: + sys.exit(1) + + sys.exit(0) + +if __name__ == '__main__': + main() +#!/usr/local/bin/python2.7 + +import argparse +import scapy.all as sp +import sys +from sniffer import Sniffer + +def check_icmp_error(args, packet): + ip = packet.getlayer(sp.IP) + if not ip: + return False + if ip.dst != args.to[0]: + return False + + icmp = packet.getlayer(sp.ICMP) + if not icmp: + return False + if icmp.type != 3 or icmp.code != 3: + return False + + return True + +def main(): + parser = argparse.ArgumentParser("CVE-2019-icmp.py", + description="CVE-2019-icmp test tool") + parser.add_argument('--sendif', nargs=1, + required=True, + help='The interface through which the packet will be sent') + parser.add_argument('--recvif', nargs=1, + required=True, + help='The interface on which to check for the packet') + parser.add_argument('--src', nargs=1, + required=True, + help='The source IP address') + parser.add_argument('--to', nargs=1, + required=True, + help='The destination IP address') + + args = parser.parse_args() + + # Send the allowed packet to establish state + udp = sp.Ether() / \ + sp.IP(src=args.src[0], dst=args.to[0]) / \ + sp.UDP(dport=53, sport=1234) + sp.sendp(udp, iface=args.sendif[0], verbose=False) + + # Start sniffing on recvif + sniffer = Sniffer(args, check_icmp_error) + + # Send the bad error packet + icmp_reachable = sp.Ether() / \ + sp.IP(src=args.src[0], dst=args.to[0]) / \ + sp.ICMP(type=3, code=3) / \ + sp.IP(src=args.src[0], dst=args.to[0]) / \ + sp.UDP(dport=53, sport=1234) + sp.sendp(icmp_reachable, iface=args.sendif[0], verbose=False) + + sniffer.join() + if sniffer.foundCorrectPacket: + sys.exit(1) + + sys.exit(0) + +if __name__ == '__main__': + main() diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile index 115a38666cc7..474b3c3b9b4b 100644 --- a/tests/sys/netpfil/pf/Makefile +++ b/tests/sys/netpfil/pf/Makefile @@ -18,15 +18,18 @@ ATF_TESTS_SH+= anchor \ synproxy \ set_skip \ pfsync \ - table + table \ + icmp ${PACKAGE}FILES+= utils.subr \ echo_inetd.conf \ sniffer.py \ pft_ping.py \ - CVE-2019-5597.py + CVE-2019-5597.py \ + CVE-2019-5598.py ${PACKAGE}FILESMODE_pft_ping.py= 0555 ${PACKAGE}FILESMODE_CVE-2019-5597.py= 0555 +${PACKAGE}FILESMODE_CVE-2019-5598.py= 0555 .include <bsd.test.mk> diff --git a/tests/sys/netpfil/pf/icmp.sh b/tests/sys/netpfil/pf/icmp.sh new file mode 100755 index 000000000000..5cc1a769c799 --- /dev/null +++ b/tests/sys/netpfil/pf/icmp.sh @@ -0,0 +1,99 @@ +# $FreeBSD$ + +. $(atf_get_srcdir)/utils.subr + +atf_test_case "cve_2019_5598" "cleanup" +cve_2019_5598_head() +{ + atf_set descr 'Test CVE-2019-5598' + atf_set require.user root + atf_set require.progs scapy +} + +cve_2019_5598_body() +{ + pft_init + + epair_in=$(vnet_mkepair) + epair_out=$(vnet_mkepair) + ifconfig ${epair_in}a 192.0.2.1/24 up + ifconfig ${epair_out}a up + + vnet_mkjail alcatraz ${epair_in}b ${epair_out}b + jexec alcatraz ifconfig ${epair_in}b 192.0.2.2/24 up + jexec alcatraz ifconfig ${epair_out}b 198.51.100.2/24 up + jexec alcatraz sysctl net.inet.ip.forwarding=1 + jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05 + jexec alcatraz route add default 198.51.100.3 + route add -net 198.51.100.0/24 192.0.2.2 + + jexec alcatraz pfctl -e + pft_set_rules alcatraz "block all" \ + "pass in proto udp to 198.51.100.3 port 53" \ + "pass out proto udp to 198.51.100.3 port 53" + + atf_check -s exit:0 $(atf_get_srcdir)/CVE-2019-icmp.py \ + --sendif ${epair_in}a \ + --recvif ${epair_out}a \ + --src 192.0.2.1 \ + --to 198.51.100.3 +} + +cve_2019_5598_cleanup() +{ + pft_cleanup +} + +atf_init_test_cases() +{ + atf_add_test_case "cve_2019_5598" +} +# $FreeBSD$ + +. $(atf_get_srcdir)/utils.subr + +atf_test_case "cve_2019_5598" "cleanup" +cve_2019_5598_head() +{ + atf_set descr 'Test CVE-2019-5598' + atf_set require.user root + atf_set require.progs scapy +} + +cve_2019_5598_body() +{ + pft_init + + epair_in=$(vnet_mkepair) + epair_out=$(vnet_mkepair) + ifconfig ${epair_in}a 192.0.2.1/24 up + ifconfig ${epair_out}a up + + vnet_mkjail alcatraz ${epair_in}b ${epair_out}b + jexec alcatraz ifconfig ${epair_in}b 192.0.2.2/24 up + jexec alcatraz ifconfig ${epair_out}b 198.51.100.2/24 up + jexec alcatraz sysctl net.inet.ip.forwarding=1 + jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05 + route add -net 198.51.100.0/24 192.0.2.2 + + jexec alcatraz pfctl -e + pft_set_rules alcatraz "block all" \ + "pass in proto udp to 198.51.100.3 port 53" \ + "pass out proto udp to 198.51.100.3 port 53" + + atf_check -s exit:0 $(atf_get_srcdir)/CVE-2019-icmp.py \ + --sendif ${epair_in}a \ + --recvif ${epair_out}a \ + --src 192.0.2.1 \ + --to 198.51.100.3 +} + +cve_2019_5598_cleanup() +{ + pft_cleanup +} + +atf_init_test_cases() +{ + atf_add_test_case "cve_2019_5598" +}
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