SecAdv903144 is not categorized as virus, worm, Trojan or backdoor. It is a security advisory released by Microsoft in order to tackle JAVAPRXY.DLL, a vulnerable component of Internet Explorer on Windows 2003/XP/2000/Me/98 computers, which allows arbitrary code to be remotely executed in the vulnerable computer. Affected versions of Internet Explorer are 5.01, 5.5 and 6.
If exploited successfully, the vulnerability 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.
The vulnerability that affects JAVAPRXY.DLL is exploited by creating a specially crafted web page and enticing users to access it.
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 different patches for each vulnerable version.