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Netgear DG632 Router Remote DoS Vulnerability
Product Name: Netgear DG632 Router
Date: 15 June, 2009
Author: tom@xxxxxxxxxxxxxxx <tom@xxxxxxxxxxxxxxx>
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