MS05-015 is not categorized as virus, worm, Trojan or backdoor. It is a critical vulnerability in the Hyperlink Object Library in Windows 2003/XP/2000/Me/98 computers, which allows to remotely execute arbitrary code in the vulnerable computer.
If exploited successfully, MS05-015 allows hackers to gain remote control of the affected computer with the same privileges as the logged on user. If this user had administrator rights, the hacker could take complete control of the system: create, modify or delete files, install programs, create new user accounts, etc.
This vulnerability is usually exploited by creating a specially crafted link. This link is then included in a malicious web page, or in an e-mail message in HTML format. If the user of a vulnerable computer is enticed into clicking the link, the hacker will take complete control of the computer.
If you have a Windows 2003/XP/2000/Me/98 computer, it is recommendable to download and apply the security patch for this vulnerability. Click here to access the web page for downloading the patch.>