bugtraq - DoS against AVM Fritz!Box 7050 (and others)

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Message-ID: <20070119164655.mll6v3mjk08s0ows@admin.betaversion.net>
Date: Fri, 19 Jan 2007 16:46:55 +0100
From: collin@...aversion.net
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: DoS against AVM Fritz!Box 7050 (and others)

Denial of Service against AVM Fritz!Box 7050 (and others)

Discovered by: Matthias Wenzel
Advisory: http://mazzoo.de/blog/2007/01/18#FritzBox_DoS

Manufacturer: AVM (www.avm.de)
Product: Fritz!Box 750 (and others)

Vendor was notified 6 month ago (see blog entry by Matthias)

Sending a zero-length UDP packet to port 5060 (SIP) of a AVM Fritz!Box will
crash the VoIP-telephony application. This works from any IP-interface,
including the DSL line.


Collin (only delivering the message to FD and BugTraq)