full-disclosure - Re: Netgear DG632 Router Remote DoS Vulnerability

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Message-Id: <200906161242.06803.hanno@hboeck.de>
Date: Tue, 16 Jun 2009 12:42:06 +0200
From: Hanno Böck <hanno@...eck.de>
To: full-disclosure@...ts.grok.org.uk
Cc: bugtraq@...urityfocus.com
Subject: Re: Netgear DG632 Router Remote DoS Vulnerability

Am Montag 15 Juni 2009 schrieb Tom Neaves:
> Within the "/cgi-bin/" directory of the administrative web interface exists
> a
> file called "firmwarecfg".  This file is used for firmware upgrades.  A
> HTTP POST
> request for this file causes the web server to hang.  The web server will
> stop
> responding to requests and the administrative interface will become
> inaccessible
> until the router is physically restarted.
>
> While the router will still continue to function at the network level, i.e.
> it will
> still respond to ICMP echo requests and issue leases via DHCP, an
> administrator will
> no longer be able to interact with the administrative web interface.
>
> This attack can be carried out internally within the network, or over the
> Internet
> if the administrator has enabled the "Remote Management" feature on the
> router.

Don't have such a device for tests, but isn't it possible to exploit this 
remotely through CSRF even without "Remote Management" option?
(i.e. put some javascript on a webpage sending a post request to the default 
ip of the router?)

-- 
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