NETGEAR DG632 Router Web Interface Can Be Crashed By Remote Users
SecurityTracker Alert ID: 1022403|
SecurityTracker URL: http://securitytracker.com/id/1022403
(Links to External Site)
Updated: Jul 1 2009|
Original Entry Date: Jun 16 2009
Denial of service via network|
Version(s): DG632; firmware version 3.4.0_ap|
A vulnerability was reported in the NETGEAR DG632 Router. A remote user can cause denial of service conditions.|
A remote user on the local network can send a specially crafted HTTP POST request for '/cgi-bin/firmwarecfg' to cause the target web management service to stop responding. A power reset is required to return the service to normal operation.
A remote user on the WAN interface can exploit this flaw if Remote Management is enabled.
The vendor was notified on June 12, 2009.
Tom Neaves reported this vulnerability.
A remote user can cause denial of service conditions on the target web service.|
No solution was available at the time of this entry.|
[Editor's note: The vendor has noted that the vulnerable product has reached end of life.]
Vendor URL: www.netgear.com/ (Links to External Site)
Exception handling error|
Source Message Contents
Date: Mon, 15 Jun 2009 19:37:53 +0100|
Subject: Netgear DG632 Router Remote DoS Vulnerability
Product Name: Netgear DG632 Router
Date: 15 June, 2009
Author: firstname.lastname@example.org <email@example.com>
Original URL: http://www.tomneaves.co.uk/Netgear_DG632_Remote_DoS.txt
Discovered: 18 November, 2006
Disclosed: 15 June, 2009
The Netgear DG632 router has a web interface which runs on port 80. This
allows an admin to login and administer the device's settings. However,
a Denial of Service (DoS) vulnerability exists that causes the web interface
to crash and stop responding to further requests.
Within the "/cgi-bin/" directory of the administrative web interface exists
file called "firmwarecfg". This file is used for firmware upgrades. A HTTP
request for this file causes the web server to hang. The web server will
responding to requests and the administrative interface will become
until the router is physically restarted.
While the router will still continue to function at the network level, i.e.
still respond to ICMP echo requests and issue leases via DHCP, an
no longer be able to interact with the administrative web interface.
This attack can be carried out internally within the network, or over the
if the administrator has enabled the "Remote Management" feature on the
Affected Versions: Firmware V3.4.0_ap (others unknown)
III. VENDOR RESPONSE
12 June, 2009 - Contacted vendor.
15 June, 2009 - Vendor responded. Stated the DG632 is an end of life
product and is no
longer supported in a production and development sense, as such, there will
be no further
firmware releases to resolve this issue.
Discovered by Tom Neaves