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Title: CDNetworks Nefficient Download(NeffyLauncher.dll) Vulnerabilities
Author: Simon Ryeo(bar4mi (at) gmail.com, barami (at) ahnlab.com)
Severity: High
Impact: Remote Code Execution
Vulnerable Systems: MS Windows Systems
Version: NeffyLauncher 1.0.5 {AA07EBD2-EBDD-4BD6-9F8F-114BD513492C}
Solution: Upgrade the vendor's patch
Vendor's Homepage: http://www.cdnetworks.com
Reference: How to stop an ActiveX control from running in Internet Explorer
http://support.microsoft.com/kb/240797/ko
http://support.microsoft.com/kb/240797/en-us
History:
Description:
Neffycient Download is a ActiveX control used to download and to upgrade
such as game install files through HTTP, FTP, etc. It has two
vulnerabilities.
1st, a attacker can copy a malicious file to any path such as start program
folder(C:\Documents and Settings\All Users\Start Menu\Programs\Startup).
2nd, a attacker can issue keycodes which are used to restrict execution on
other domains.
Object:
I notify this vulnerability not to promote abnormal uses but to make
a software more secure. This vulnerability was patched by the vendor's
positive effort. I hope this information helps many people who try
to study security and to develop an application.
In this way an attacker can modify SkinPath's value to All Users's Start
Program Folder. Then he can execute his malicious program when the user
restarts his computer.
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