INTRUDERS TIGER TEAM SECURITY - SECURITY
ADVISORYhttp://www.intruders.com.br/http://www.intruders.org.br/ADVISORY/0206 -
D-Link Wireless Access-Point (DWL-2100ap)PRIORITY: HIGHI -
INTRUDERS:----------------Intruders Tiger Team Security is a project entailed
with Security Open Source (http://www.securityopensource.org.br).The Intruders
Tiger Team Security (ITTS) is a group of researchers with more than 10 years of
experience, specialized in the development of intrusion projects (Pen-Test) and
in special security projects.All the projects of intrusion (Pen-Test) realized
until the moment by the Intruders Tiger Team Security had 100% of success.II -
INTRODUCTION:------------------D-Link AirPlus XtremeG 2.4GHz Wireless Access
Point, 54Mbps/108Mbps (802.11g):D-Link, the industry pioneer in wireless
networking, introduces a performance breakthrough in wireless connectivity ?
D-Link AirPlus Xtreme GTM series of high-speed devices now capable of
delivering transfer rates up to 15x faster than the standard 802.11b with the
new D-Link 108G. With the new AirPlus Xtreme G DWL-2100AP Wireless Access
Point, D-Link sets a new standard for wireless access points.D-Link DWL-2100ap
is one of the most popular Access Point in the world.III -
DESCRIPTION:------------------Intruders Tiger Team Security identified during
an intrusion project (Pen-Test) an unknown vulnerability in the Access Point
D-Link DWL-2100ap, that allows an attacker to read device's configuration,
without authentication with web server.Extremely sensible informations are
avaible in the configuration of the Access Point D-Link DWL-2100ap, for
example:- User and password used to manage the device.- Password used in WEP
and WPA.- SSID, IP, subnet mask, MAC Address filters, etc.IV -
ANALISYS:---------------Making a HTTP request to the /cgi-bin/ directory, the
Web server will return error 404 (Page not found).Making a HTTP request to the
/cgi-bin/AnyFile.htm, the Web server will return error 404 (Page not
found).However, making a HTTP request to any file in /cgi-bin/ directory, with
.cfg extension, will return all the device configuration.For example, making
the following request:http://dlink-DWL-2100ap/cgi-bin/Intruders.cfgWe would
have a result equivalent to the following:# Copyright (c) 2002 Atheros
Communications, Inc., All Rights Reserved# DO NOT EDIT -- This configuration
file is automatically generatedmagic Ar52xxAPfwc: 34login adminDHCPServer
Eth_Acl nameaddrdomainsuffix IP_Addr 10.0.0.30IP_Mask 255.0.0.0Gateway_Addr
10.0.0.1RADIUSaddr RADIUSport 1812RADIUSsecret password IntrudersTestpassphrase
wlan1 passphrase AnewBadPassPhrase# Several lines removed.D-Link DWL-2100ap
Access Point does not allow disable the Web server, not even has options to
filter ports. We remember that the D-Link DWL-2100ap Access Point comes
configured with default user /password (user:admin and no password).V.
DETECTION:-------------Intruders Tiger Team Security confirmed the existence of
this vulnerability in all firmwares tested, also the last version 2.10na.
Possibly other(s) D-Link Access Point model(s) can be vulnerable also.VI.
SUGESTION:--------------D-Link company:1 - Use strong cookies to guarantee that
only authorized users will get access to configuration.2 - Store sensible
configurations like password(s) using hash(s).3 - Allow create firewall
politics and rules to filters port(s) and IP(s).4 - Request to the user change
the default user/password on the first logon, and not allow change the
password to the last one used.5 - Use HTTP with SSL (HTTPS).6 - Contracts
specialized companies in Pen-Test and security audit, aiming homologate the
security of D-Link products.D-Link customers:1 - Upgrade the firmware of D-Link
DWL-2100ap Access Point. Direct link to download is
http://www.dlinkbrasil.com.br/internet/downloads/Wireless/DWL-2100AP/DWL2100AP-firmware-v210na-r0343.tfpVII
- CHRONOLOGY:-----------------11/02/2006 - Vulnerability discovered during a
Pen-Test.15/02/2006 - D-Link World Wide Team Contacted.17/02/2006 - No
response.18/02/2006 - D-Link World Wide Team re-contacted.24/02/2006 - No
response.25/02/2006 - D-Link World Wide Team last try of contact.29/02/2006 -
No response.29/02/2006 - D-Link Brazil Team Contacted.02/03/2006 - No
response.03/03/2006 - D-Link Brazil Team re-contacted.06/03/2006 - D-Link
Brazil Team responsed.09/03/2006 - Patch created.14/03/2006 - Patch added to
D-Link Brazil download site.06/06/2006 - published advisory.VIII -
CREDITS:---------------Wendel Guglielmetti Henrique and Intruders Tiger Team
Security had discovered this vulnerability.Gratefulness to Glaudson Ocampos
(Intruders Tiger Team Security), Waldemar Nehgme, JoãoArquimedes (Security Open
Source) and Ricardo N. Ferreira (Security Open Source).Visit our
website:http://www.intruders.com.br/http://www.intruders.org.br/
