MS07-046 is not categorized as virus, worm, Trojan or backdoor. It is a critical vulnerability in the Microsoft Windows graphics device interface (GDI) on Windows 2003/XP/2000 computers, which allows arbitrary code to be remotely executed in the vulnerable computer.
Windows graphics device interface (GDI) enables applications to use graphics and formatted text on both the video display and the printer.
If exploited successfully, MS07-046 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 sending a specially crafted attachment via email and then persuading the user to open the attachment. If so, the attacker could cause arbitrary code to run in the security context of the locally logged-on user.
If you have a Windows 2003/XP/2000 computer, it is recommended to download and apply the security patch for this vulnerability. Click here to access the web page for downloading the patch.
Additionally, bear in mind that this security bulletin replaces a previous bulletin, called MS06-001.