[NT] Multiple Remote Buffer Overflow in Avirt Soho

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To: list@securiteam.com
Date: 24 Feb 2004 12:52:10 +0200

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  Multiple Remote Buffer Overflow in Avirt Soho
------------------------------------------------------------------------

SUMMARY

 <http://www.avirt.com/> Avirt Soho was "developed for the home or small
office, Soho installs in minutes! Its intuitive wizards and simple
interface automate the setup process and make maintenance a snap. Don't
worry if you're new to networking or Internet sharing - Avirt Soho does
all the work!". Two buffer overflows have been found in the product
allowing a remote attacker to cause the product to no longer respond to
legitimate requests.

DETAILS

Vulnerable Systems:
 * Avirt Soho version 4.3

Exploit:
To test the vulnerability simply send to the server ( port 1080 ) a string
like:
GET aaaa[ 1113 of a ]aaaa

To test the vulnerability on the web service send to the server ( port
8080 ) a string like:
GET %%%%[ 2061 of % ]%%%% HTTP/1.1

ADDITIONAL INFORMATION

The information has been provided by <mailto:fdonato@autistici.org>
Donato Ferrante.

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